CN210720654U - Electrical system with online sampling and checking functions - Google Patents

Electrical system with online sampling and checking functions Download PDF

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Publication number
CN210720654U
CN210720654U CN201921457422.6U CN201921457422U CN210720654U CN 210720654 U CN210720654 U CN 210720654U CN 201921457422 U CN201921457422 U CN 201921457422U CN 210720654 U CN210720654 U CN 210720654U
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gas density
density relay
contact
gas
temperature
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CN201921457422.6U
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金海勇
夏铁新
黄小泵
郭正操
常敏
王乐乐
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Shanghai Roye Electric Science and Technology Co Ltd
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Shanghai Roye Electric Science and Technology Co Ltd
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Abstract

The application provides an electrical system with online sampling check-up function for high pressure, middling pressure electrical equipment, including electrical equipment, gas density relay, gas density detection sensor, temperature regulation mechanism, online check-up contact signal sampling unit and intelligent control unit. Temperature through temperature adjustment mechanism regulation gas density relay temperature compensation element goes up and down, make electrical equipment's gas density relay take place the contact action, the contact action is transmitted to the intelligence through online check-up contact signal sampling unit and is controlled the unit, intelligence is controlled the density value when unit is moved according to the contact, detect out warning and/or shutting contact signal action value and/or return value, need not the maintainer to the check-up work that just can accomplish gas density relay on-the-spot, the reliability of electric wire netting has been improved greatly, the efficiency is improved, the cost is reduced, realize the mutual self-checking between gas density relay and gas density detection sensor simultaneously, and then realize non-maintaining.

Description

Electrical system with online sampling and checking functions
Technical Field
The utility model relates to an electric power tech field especially relates to an use on high pressure, middling pressure electrical equipment, has the electrical system (or electrical equipment) of online sampling check-up function.
Background
The gas density relay is generally used for monitoring and controlling the density of insulating gas in high-voltage electrical equipment, a contact signal control loop is arranged in the gas density relay, a gas path of the gas density relay is communicated with a gas chamber of the high-voltage electrical equipment, when gas leakage is detected, a contact of the gas density relay acts to generate a contact signal, and the contact signal control loop gives an alarm or locks according to the contact signal, so that the safe operation protection of the electrical equipment is realized.
At present, SF6(sulfur hexafluoride) electrical equipment is widely applied to the power sector and industrial and mining enterprises, and rapid development of the power industry is promoted. SF in high-voltage electrical equipment gas chamber6If the density of the gas is reduced and the micro water content exceeds the standard, the SF is seriously influenced6Safe operation of high-voltage electrical equipment: 1) SF6The reduction of the gas density to a certain extent will result in a loss of insulation and arc extinguishing properties. 2) In the presence of some metal species, SF6The gas can generate hydrolysis reaction with water at the high temperature of more than 200 ℃ to generate active HF and SOF2The insulation and metal parts are corroded and generate a large amount of heat, so that the pressure of the gas chamber is increased. 3) When the temperature is reduced, excessive moisture can form condensed water, so that the surface insulation strength of the insulation part is obviously reduced, and even flashover is caused, thereby causing serious harm. The grid operating regulations therefore imposeBefore and during the operation of the plant, the SF must be used6The density and water content of the gas are periodically measured.
With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the SF is subjected to6The online monitoring of the gas density and the micro-water content state of the electrical equipment has important practical significance. With the continuous and vigorous development of the intelligent power grid in China, intelligent high-voltage and medium-voltage electrical equipment is used as an important component and a key node of an intelligent substation, and plays a significant role in the safety of the intelligent power grid.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrical system (or electrical equipment) with online sampling check-up function to solve the problem that proposes in the above-mentioned technical background.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electrical system with online sample verification functionality, comprising:
the electric equipment is internally provided with a gas chamber filled with insulating gas;
the gas density relay is arranged outside a gas chamber of the electrical equipment or is arranged outside the gas chamber of the electrical equipment through a valve;
the temperature adjusting mechanism is a temperature-adjustable adjusting mechanism and is configured to adjust the temperature rise and fall of a temperature compensation element of the gas density relay so as to enable the gas density relay to generate contact action;
the gas density detection sensor is communicated with the gas density relay;
the online check contact signal sampling unit is connected with the gas density relay and is configured to sample a contact signal generated when a contact of the gas density relay acts;
the intelligent control unit is respectively connected with the gas density detection sensor, the temperature adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the temperature adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay;
wherein the contact signal comprises an alarm, and/or a latch.
Preferably, the electrical equipment comprises SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmentally friendly gas electrical equipment, or other insulated gas electrical equipment.
Specifically, the electrical equipment comprises a GIS, a GIL, a PASS, a circuit breaker, a current transformer, a voltage transformer, a transformer, an inflatable cabinet and a ring main unit.
Preferably, the electrical system comprises a bracket, the gas chamber of the electrical equipment is positioned above or below the bracket, the bracket comprises a vertical rack and a horizontal rack, and the gas density relay is positioned in the inner accommodating space of the horizontal rack.
Preferably, the gas density relay includes, but is not limited to, a bimetal compensated gas density relay, a gas compensated gas density relay, a bimetal and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6 gas density relay, SF6 mixed gas density relay, N2 gas density relay.
Preferably, the gas density detection sensor is provided on the gas density relay; or the temperature adjusting mechanism is arranged inside or outside the gas density relay; or, the gas density detection sensor, on-line check contact signal sampling unit and the intelligent control unit are arranged on the gas density relay.
More preferably, the gas density relay and the gas density detection sensor are of an integrated structure; or the gas density relay and the gas density detection sensor are a remote transmission type gas density relay with an integrated structure.
Preferably, the gas density detection sensor is of an integrated structure; or, the gas density detection sensor is a gas density transmitter with an integrated structure.
More preferably, online check joint signal sampling unit, the intelligence accuse unit sets up on the gas density transmitter.
Preferably, the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; or, a gas density transmitter consisting of a pressure sensor and a temperature sensor is adopted; alternatively, a density detection sensor using quartz tuning fork technology.
More preferably, the probe of the pressure sensor is mounted on the gas path of the gas density relay.
More preferably, the probe of the temperature sensor is mounted on or outside the gas path of the gas density relay, or inside the gas density relay, or outside the gas density relay.
More preferably, the temperature sensor may be a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be a thermal resistor and a thermocouple.
More preferably, the pressure sensor includes, but is not limited to, a relative pressure sensor, and/or an absolute pressure sensor.
Further, the pressure sensor may also be a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil-induced pressure sensor (e.g., a pressure sensor with an induction coil in the bawden tube), a resistive pressure sensor (e.g., a pressure sensor with a slide wire resistor in the bawden tube); the pressure sensor can be an analog pressure sensor or a digital pressure sensor.
More preferably, at least one of said temperature sensors is arranged in the vicinity of, on or integrated in a temperature compensation element of said gas density relay. Preferably, at least one temperature sensor is arranged at one end of the pressure detector of the gas density relay, which is close to the temperature compensation element; the pressure detector is a Badon tube or a corrugated tube, and the temperature compensation element adopts a temperature compensation sheet or gas sealed in the shell.
More preferably, the intelligent control unit compares the environmental temperature value with the temperature value collected by the temperature sensor to complete the calibration of the temperature sensor.
Preferably, the temperature adjustment mechanism is a heating element; or the temperature regulating mechanism comprises a heating element, a heat preservation piece, a temperature controller, a temperature detector and a temperature regulating mechanism shell; alternatively, the temperature adjustment mechanism comprises a heating element and a temperature controller; or the temperature adjusting mechanism comprises a heating element, a heating power adjuster and a temperature controller; or the temperature adjusting mechanism comprises a heating element, a refrigerating element, a power regulator and a temperature controller; or the temperature adjusting mechanism comprises a heating element, a heating power regulator and a constant temperature controller; or the temperature adjusting mechanism comprises a heating element, a controller and a temperature detector; or, the temperature adjusting mechanism is a heating element which is arranged near the temperature compensation element; or the temperature adjusting mechanism is a micro constant temperature box; the number of the heating elements is at least one, and the heating elements comprise but are not limited to one of silicon rubber heaters, resistance wires, electric heating tapes, electric heating rods, hot air blowers, infrared heating devices and semiconductors; the temperature controller is connected with the heating element and used for controlling the heating temperature of the heating element, and the temperature controller comprises but is not limited to one of a PID controller, a controller combining PID and fuzzy control, a variable frequency controller and a PLC controller.
More preferably, the heating elements in the temperature regulating mechanism comprise at least two heating elements with the same or different powers; or comprise a heating element with adjustable heating power.
More preferably, the arrangement positions of at least two heating elements can be the same or different, and can be reasonably arranged according to needs.
Preferably, the temperature adjusting mechanism is controlled in a multi-stage temperature increasing and decreasing manner.
Preferably, the temperature regulating mechanism is controlled by the intelligent control unit, when the action value of the contact signal of the gas density relay is measured, the temperature change speed is not more than 1.0 ℃ per second when the action value is approached (or the requirement is set according to the requirement), namely the temperature requirement is steadily increased or decreased.
Preferably, the intelligent control unit realizes maintenance-free of the gas density relay by comparing data detected by the mutual self-calibration unit; or the intelligent control unit and the mutual self-correction unit are used for comparing the detected data, so that the maintenance-free gas density relay is realized.
Preferably, the intelligent control unit further comprises a depth calculation unit, and the depth calculation unit can provide an air source with proper initial density for the gas density relay to be verified according to an environmental temperature value, a gas density value or a pressure value of the electrical equipment and a gas pressure-temperature characteristic; or, the intelligence is controlled the unit according to the ambient temperature value when the check-up, the gas pressure value of electrical equipment air chamber the temperature value that gas density relay needs the check-up, according to gas pressure-temperature characteristic, can be for required check-up gas density relay provides the suitable air supply of initial density of a check-up.
Preferably, one end of the valve is provided with a connecting port communicated with electrical equipment, and the other end of the valve is communicated with the gas path of the gas density relay.
Preferably, the valve is further connected with the intelligent control unit, and the valve is closed or opened under the control of the intelligent control unit.
Preferably, the valve is in communication with the electrical device via a connector.
Preferably, the valve is an electric valve, and/or a solenoid valve.
More preferably, the valve is a permanent magnet solenoid valve.
Preferably, the valve is a piezoelectric valve, or a temperature control valve, or a novel valve which is made of an intelligent memory material and is opened or closed by electric heating.
Preferably, the valve is closed or opened in a hose bending or flattening mode.
Preferably, the valve is sealed within a chamber or housing.
Preferably, pressure sensors are respectively arranged on two sides of the air path of the valve; or, the two sides of the air path of the valve are respectively provided with a pressure detector.
Preferably, the electrical system further comprises a self-sealing valve mounted between the electrical device and the valve; alternatively, the valve is mounted between the electrical device and the self-sealing valve.
Preferably, the electrical system with online sampling verification function further includes: the gas path of the pressure regulating mechanism is communicated with the gas density relay; the pressure regulating mechanism is also connected with the intelligent control unit, the pressure of the gas density relay is regulated to rise and fall under the control of the intelligent control unit, and then the gas density relay is matched or/and combined with the temperature regulating mechanism to enable the gas density relay to generate contact action; or, further comprising: the intelligent control unit is connected with the heating device; or, still include air chamber and heating device, the air chamber with gas density relay is linked together, the outside or the inside of air chamber are equipped with the heating device, the intelligence accuse unit with the heating device is connected.
More preferably, the valve and the pressure regulating mechanism are sealed within a single chamber or housing.
More preferably, the pressure regulating mechanism is sealed within a chamber or housing.
More preferably, during verification, the pressure adjusting mechanism is a closed gas chamber, a heating element and/or a refrigerating element is arranged outside or inside the closed gas chamber, and the temperature of the gas in the closed gas chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the gas density relay is increased or decreased.
Further, the heating element, and/or the cooling element is a semiconductor.
Further, the pressure regulating mechanism further comprises a heat preservation piece, and the heat preservation piece is arranged outside the closed air chamber.
More preferably, during verification, the pressure adjusting mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with the gas path of the gas density relay; the cavity is internally provided with a piston, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod and then drives the piston to move in the cavity.
More preferably, during verification, the pressure adjusting mechanism is a closed air chamber, a piston is arranged inside the closed air chamber, the piston is in sealing contact with the inner wall of the closed air chamber, a driving component is arranged outside the closed air chamber, and the driving component pushes the piston to move in the cavity through electromagnetic force.
More preferably, the pressure adjustment mechanism is an air bag having one end connected to a driving member, the air bag is driven by the driving member to generate a volume change, and the air bag is communicated with the gas density relay.
More preferably, the pressure adjusting mechanism is a bellows, one end of the bellows is communicated with the gas density relay, and the other end of the bellows extends and contracts under the driving of the driving part.
The driving component of the pressure adjusting mechanism includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or stepping motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
More preferably, the pressure regulating mechanism is a purge valve.
Further, the pressure regulating mechanism further comprises a flow valve for controlling the gas release flow.
Further, the air release valve is an electromagnetic valve or an electric valve, or other air release valves realized by electric or pneumatic means.
Further, the bleed valve is put gaseous zero-bit to, intelligence is controlled the unit and is gathered pressure value at that time, compares, accomplishes the zero-bit check-up to pressure sensor, and intelligence is controlled unit or backstage contrast and is judged the result, if the error is out of tolerance, sends unusual suggestion: pressure sensors have problems.
More preferably, the pressure regulating mechanism is a compressor.
More preferably, the pressure regulating mechanism is a pump, and the pump includes, but is not limited to, one of a pressurizing pump, an electric air pump, and an electromagnetic air pump.
More preferably, the gas density relay, the valve, and the pressure adjusting mechanism are connected together by a connecting pipe.
Further, the gas path of the pressure regulating mechanism is communicated with the gas path of the gas density relay through a first connecting pipe; the gas outlet of the valve is directly communicated with the gas circuit of the gas density relay through a second connecting pipe, or the gas outlet of the valve is connected with the gas circuit of the pressure regulating mechanism through a second connecting pipe, so that the valve is communicated with the gas circuit of the gas density relay.
Preferably, the online check joint signal sampling unit and the intelligent control unit are arranged together.
More preferably, the online verification contact signal sampling unit and the intelligent control unit are sealed in a cavity or a shell.
Preferably, the online verification contact signal sampling unit samples the contact signal of the gas density relay, and the sampling conditions are as follows:
the online check joint signal sampling unit is provided with at least one group of independent sampling joints, can automatically complete check on at least one joint simultaneously, and continuously measures without changing the joint or reselecting the joint; wherein, the contact includes, but is not limited to one of warning contact, warning contact + shutting 1 contact + shutting 2 contact, warning contact + shutting contact + superpressure contact.
Preferably, the online verification contact signal sampling unit is used for testing the contact signal action value of the gas density relay or the switching value of the contact signal action value not lower than 24V, namely, during verification, a voltage not lower than 24V is applied between corresponding terminals of the contact signal.
Preferably, the contact of the gas density relay is a normally open density relay, the online verification contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact and the contact signal control circuit of the gas density relay, and the second connecting circuit is connected with the contact and the intelligent control unit of the gas density relay; in a non-verification state, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the online checking contact signal sampling unit cuts off the first connecting circuit, is communicated with the second connecting circuit and connects the contact of the gas density relay with the intelligent control unit; alternatively, the first and second electrodes may be,
the contact of the gas density relay is a normally closed density relay, the online checking contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact of the gas density relay and a contact signal control circuit, and the second connecting circuit is connected with the contact of the gas density relay and the intelligent control unit; in a non-verification state, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; under the check-up state, online check-up contact signal sampling unit is closed contact signal control circuit cuts off gas density relay's contact and contact signal control circuit's being connected, the intercommunication second connecting circuit, will gas density relay's contact with the intelligence is controlled the unit and is connected.
More preferably, the first connection circuit comprises a first relay, the second connection circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact maintain opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay;
in a non-checking state, the normally closed contact is closed, the normally open contact is opened, and the gas density relay monitors the output state of the contact in real time; under the check-up state, normally closed contact disconnection, normally open contact is closed, gas density relay's contact passes through normally open contact with the intelligence is controlled the unit and is connected. For a density relay with normally closed contacts, the adjustment can be made accordingly.
Further, the first relay and the second relay may be two independent relays or may be the same relay.
More preferably, the online checking contact signal sampling unit is provided with a contact sampling circuit, the contact sampling circuit comprises a photoelectric coupler and a resistor, and the photoelectric coupler comprises a light emitting diode and a phototriode; the light emitting diode and the contact of the gas density relay are connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of the phototriode is connected with the intelligent control unit, and the collector of the phototriode is also connected with a power supply through the resistor;
when the contact is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level;
when the contact is opened, the closed loop is opened, the light emitting diode does not emit light, the phototriode is cut off, and the collector of the phototriode outputs high level.
More preferably, the online verification contact signal sampling unit is provided with a contact sampling circuit, and the contact sampling circuit comprises a first photoelectric coupler and a second photoelectric coupler;
the light emitting diode of the first photoelectric coupler and the light emitting diode of the second photoelectric coupler are respectively connected in parallel or directly connected in parallel through a current limiting resistor, and are connected in series with the contact of the gas density relay after being connected in parallel to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler and the second photoelectric coupler are opposite;
the collector of the phototriode of the first photoelectric coupler and the collector of the phototriode of the second photoelectric coupler are connected with a power supply through a divider resistor, the emitter of the phototriode of the first photoelectric coupler is connected with the emitter of the phototriode of the second photoelectric coupler to form an output end, and the output end is connected with the intelligent control unit and is grounded through a resistor;
when the contact is closed, a closed loop is electrified, the first photoelectric coupler is conducted, the second photoelectric coupler is cut off, and the emitter of the phototriode of the first photoelectric coupler outputs high level; or the first photoelectric coupler is cut off, the second photoelectric coupler is conducted, and an emitter of a phototriode of the second photoelectric coupler outputs a high level;
when the contact is disconnected, the closed loop is powered off, the first photoelectric coupler and the second photoelectric coupler are both cut off, and the emitters of the phototriodes of the first photoelectric coupler and the second photoelectric coupler output low levels.
Furthermore, the contact sampling circuit further comprises a first voltage stabilizing diode group and a second voltage stabilizing diode group, the first voltage stabilizing diode group and the second voltage stabilizing diode group are connected in parallel on the contact signal control loop, and the connection directions of the first voltage stabilizing diode group and the second voltage stabilizing diode group are opposite; the first voltage stabilizing diode group and the second voltage stabilizing diode group are respectively formed by connecting one, two or more than two voltage stabilizing diodes in series. Alternatively, a diode may be used instead of the zener diode.
Still further, the first zener diode group comprises a first zener diode and a second zener diode which are connected in series, and a cathode of the first zener diode is connected to an anode of the second zener diode; the second voltage stabilizing diode group comprises a third voltage stabilizing diode and a fourth voltage stabilizing diode which are connected in series, and the anode of the third voltage stabilizing diode is connected with the cathode of the fourth voltage stabilizing diode.
More preferably, the online checking contact signal sampling unit is provided with a contact sampling circuit, the contact sampling circuit comprises a first hall current sensor and a second hall current sensor, contacts of the first hall current sensor, the second hall current sensor and the gas density relay are connected in series to form a closed loop, and a contact of the gas density relay is connected between the first hall current sensor and the second hall current sensor; the output end of the first Hall current sensor and the output end of the second Hall current sensor are both connected with the intelligent control unit;
when the contact is closed, a closed loop is electrified, and current flows between the first Hall current sensor and the second Hall current sensor to generate induced potential;
when the contact is opened, the closed loop is powered off, no current flows between the first Hall current sensor and the second Hall current sensor, and the generated induced potential is zero.
More preferably, the online verification contact signal sampling unit is provided with a contact sampling circuit, and the contact sampling circuit includes: the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier;
first silicon controlled rectifier, third silicon controlled rectifier establish ties, and the series connection circuit that second silicon controlled rectifier, fourth silicon controlled rectifier establish ties the back and first silicon controlled rectifier, third silicon controlled rectifier constitute forms the series-parallel closed circuit, the one end of gas density relay's contact pass through the circuit with circuit electricity between first silicon controlled rectifier, the third silicon controlled rectifier is connected, the other end pass through the circuit with circuit electricity between second silicon controlled rectifier, the fourth silicon controlled rectifier is connected.
Furthermore, the cathode of the first controllable silicon is connected with the intelligent control unit, and the anode of the first controllable silicon is connected with the cathode of the third controllable silicon; the control electrodes of the first controllable silicon and the third controllable silicon are connected with the intelligent control unit; the cathode of the second controllable silicon is connected with the intelligent control unit, and the anode of the second controllable silicon is connected with the cathode of the fourth controllable silicon; and the control electrodes of the second controllable silicon and the fourth controllable silicon are connected with the intelligent control unit.
Preferably, the intelligent control unit acquires a gas density value acquired by the gas density detection sensor; or, the intelligent control unit acquires the pressure value and the temperature value acquired by the gas density detection sensor, and the gas density relay is used for monitoring the gas density on line. Namely, the gas density relay completes the on-line monitoring of the gas density of the monitored electrical equipment.
More preferably, the intelligent control unit calculates the gas density value by using an average method (averaging method), wherein the average method is as follows: setting acquisition frequency in a set time interval, and carrying out average value calculation processing on N gas density values of different acquired time points to obtain the gas density values; or setting a temperature interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different temperature values acquired in the whole temperature range to obtain a gas density value; or setting a pressure interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different pressure values acquired in the whole pressure variation range to obtain a gas density value; wherein N is a positive integer greater than or equal to 1.
Preferably, the intelligent control unit acquires a gas density value acquired by the gas density detection sensor when the gas density relay generates contact signal action or switching, and completes online verification of the gas density relay; alternatively, the first and second electrodes may be,
the intelligence accuse unit acquires gas density relay takes place contact signal action or when switching the pressure value and the temperature value that gas density detection sensor gathered to according to the pressure value that gas pressure-temperature characteristic conversion becomes corresponding 20 ℃, gas density value promptly, accomplish gas density relay's online check-up.
Preferably, the gas density relay is provided with a comparison density value output signal which is connected with the intelligent control unit; or, the gas density relay has a comparison pressure value output signal, and the comparison pressure value output signal is connected with the intelligent control unit.
More preferably, when the gas density relay outputs an output signal of the comparison density value, the intelligent control unit acquires the current gas density value, performs comparison, completes the comparison density value verification of the gas density relay, judges the result through the intelligent control unit or background comparison, and sends an abnormal prompt if the error is out of tolerance; alternatively, the first and second electrodes may be,
when the gas density relay outputs a comparison density value output signal, the intelligent control unit acquires the current gas density value, compares the gas density value with the current gas density value to complete the mutual verification of the gas density relay and the gas density detection sensor, judges the result by the intelligent control unit or background comparison, and sends an abnormal prompt if the error is out of tolerance; alternatively, the first and second electrodes may be,
when gas density relay output compares pressure value output signal, intelligence accuse unit gathers pressure value at that time, compares, accomplishes the mutual check-up to gas density relay and gas density detection sensor, and intelligence accuse unit or backstage contrast are judged the result, if the error is out of tolerance, send unusual suggestion.
Preferably, the electrical system with online sampling and checking functions comprises at least two gas density detection sensors, wherein each gas density detection sensor comprises a pressure sensor and a temperature sensor; and comparing the gas density values detected by the gas density detection sensors to finish the mutual verification of the gas density detection sensors.
Preferably, the gas density detection sensor comprises at least two pressure sensors, and the pressure values acquired by the pressure sensors are compared to complete mutual verification of the pressure sensors.
Preferably, the gas density detection sensor comprises at least two temperature sensors, and the temperature values acquired by the temperature sensors are compared to complete mutual verification of the temperature sensors.
Preferably, the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; randomly arranging and combining the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors, converting the combinations into a plurality of corresponding pressure values at 20 ℃ according to gas pressure-temperature characteristics, namely gas density values, and comparing the gas density values to finish the mutual verification of the pressure sensors and the temperature sensors; or the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors are subjected to all permutation and combination, and each combination is converted into a plurality of corresponding pressure values at 20 ℃ according to the gas pressure-temperature characteristic, namely gas density values, and each gas density value is compared to complete the mutual verification of each pressure sensor and each temperature sensor; or comparing the gas density values obtained by the pressure sensors and the temperature sensors with the output signals of the comparison density values output by the gas density relay, and finishing the mutual verification of the gas density relay, the pressure sensors and the temperature sensors.
Preferably, after the gas density relay is verified, the electrical system automatically generates a verification report of the gas density relay, and if the gas density relay is abnormal, the electrical system sends an alarm and uploads the alarm to a remote end or sends the alarm to a designated receiver.
Preferably, the intelligent control unit automatically controls the whole verification process based on an embedded algorithm and a control program of an embedded system of the microprocessor, and comprises all peripherals, logic and input and output.
More preferably, the intelligent control unit automatically controls the whole verification process based on embedded algorithms and control programs such as a general-purpose computer, an industrial personal computer, an ARM chip, an AI chip, a CPU, an MCU, an FPGA, a PLC and the like, an industrial control main board, an embedded main control board and the like, and includes all peripherals, logics, input and output.
Preferably, the intelligent control unit is provided with an electrical interface, and the electrical interface completes test data storage, and/or test data export, and/or test data printing, and/or data communication with an upper computer, and/or analog quantity and digital quantity information input.
More preferably, the electrical system supports the input of basic information of the gas density relay, the basic information including, but not limited to, one or more of factory number, accuracy requirement, rating parameter, manufacturing plant, operating location.
Preferably, the intelligent control unit further comprises a communication module for transmitting the test data and/or the verification result in a long distance.
More preferably, the communication mode of the communication module is a wired communication mode or a wireless communication mode.
Further, the wired communication mode includes, but is not limited to, one or more of an RS232 BUS, an RS485 BUS, a CAN-BUS BUS, 4-20mA, Hart, IIC, SPI, Wire, a coaxial cable, a PLC power carrier and a cable.
Further, the wireless communication mode includes, but is not limited to, one or more of NB-IOT, 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication and sonar.
Preferably, a clock is further arranged on the intelligent control unit, and the clock is configured to be used for regularly setting the verification time of the gas density relay, or recording the test time, or recording the event time.
Preferably, the control of the intelligent control unit is controlled through a field control and/or a background control.
More preferably, the electrical system completes the online verification of the gas density relay according to the setting or the instruction of the background; or, completing the online verification of the gas density relay according to the set verification time of the gas density relay.
Preferably, the circuit of the intelligent control unit comprises an intelligent control unit protection circuit, and the intelligent control unit protection circuit comprises, but is not limited to, one or more of an anti-static interference circuit (such as ESD and EMI), an anti-surge circuit, an electric fast protection circuit, an anti-radio frequency field interference circuit, an anti-pulse group interference circuit, a power supply short circuit protection circuit, a power supply connection reverse protection circuit, an electric contact misconnection protection circuit, and a charging protection circuit.
Preferably, the electrical system further comprises a multi-way joint, and the gas density relay, the valve and the pressure regulating mechanism are arranged on the multi-way joint; or the intelligent control unit is arranged on the multi-way connector.
More preferably, the gas path of the gas density relay is connected with a first joint of the multi-way joint; the gas path of the pressure regulating mechanism is connected with a second joint of the multi-way joint, and the first joint is communicated with the second joint so as to communicate the gas path of the pressure regulating mechanism with the gas path of the gas density relay; and the gas outlet of the valve is communicated with a third joint of the multi-way joint, and the third joint is communicated with the first joint, so that the gas outlet of the valve is communicated with the gas circuit of the pressure regulating mechanism and/or the gas circuit of the gas density relay.
Furthermore, the third joint of the multi-way joint is provided with a connecting part butted with the electrical equipment, and the valve is embedded in the connecting part.
More preferably, a connector is arranged on a shell of the gas density relay and is fixed in a gas chamber of the electrical equipment; or, preferably, the housing of the gas density relay is fixed on the multi-way joint, and the multi-way joint is fixed in the gas chamber.
Preferably, the electrical system further comprises a gas supplementing interface.
More preferably, the air supply interface is arranged on the pressure regulating mechanism; or the air supply interface is arranged on the electrical equipment; or the air supply interface is arranged on the multi-way joint; or the air supply interface is arranged on the self-sealing valve.
More preferably, the electrical system is capable of counting the number of gas additions; or the air supplement amount; or for the time of invigorating qi.
Preferably, the electrical system can be used for online air make-up.
Preferably, the electrical system may be capable of on-line gas drying.
Preferably, the electrical system further comprises: and the display interface is used for man-machine interaction, is connected with the intelligent control unit, displays the current verification data in real time and/or supports data input. Specifically, the method comprises real-time online gas density value display, pressure value display, temperature value display, change trend analysis, historical data query, real-time alarm and the like.
Preferably, the electrical system further comprises: and the micro water sensor is respectively connected with the gas density relay and the intelligent control unit.
More preferably, the electrical system further comprises: gas circulation mechanism, gas circulation mechanism respectively with gas density relay with the intelligence is controlled the unit and is connected, gas circulation mechanism includes capillary, sealed cavity and heating element, through heating element, realizes that gas flows, the gaseous inside little water value of on-line monitoring.
Further, the micro water sensor can be installed in a sealed chamber of the gas circulation mechanism, in a capillary, at a capillary port, and outside the capillary.
Preferably, the electrical system further comprises: and the decomposition substance sensor is respectively connected with the gas density relay and the intelligent control unit.
Preferably, the electrical system further comprises a camera for monitoring.
Preferably, the electrical system monitors the gas density value, or the density value, the pressure value and the temperature value on line; or the electric system remotely transmits and monitors the gas density value, or the density value, the pressure value and the temperature value.
Preferably, the electric system has a self-diagnosis function capable of timely notifying an abnormality. Such as a wire break, short alarm, sensor damage, etc.
Preferably, the electrical system has a safety protection function: when the gas density value or the pressure value is lower than the set value, the verification is automatically not carried out, and an informing signal is sent out.
Preferably, the electrical system is provided with a heater and/or a radiator (e.g. a fan), the heater being switched on when the temperature is below a set value and the radiator (e.g. the fan) being switched on when the temperature is above the set value.
Preferably, the gas density relay further comprises a contact resistance detection unit, and the contact resistance detection unit is connected with a contact signal or directly connected with a signal generator in the gas density relay; under the control of the online checking contact signal sampling unit, the contact signal of the gas density relay is isolated from a control loop of the gas density relay, and when the contact signal of the gas density relay acts and/or receives an instruction of detecting the contact resistance of the contact, the contact resistance detection unit can detect the contact resistance value of the contact of the gas density relay.
Preferably, the gas density relay further comprises an insulation resistance detection unit, wherein the insulation resistance detection unit is connected with the contact or directly connected with a signal generator in the gas density relay; under the control of the online checking contact signal sampling unit, the contact of the gas density relay is isolated from a control loop of the gas density relay, and when the contact of the gas density relay acts and/or receives an instruction of detecting the insulation resistance of the contact, the insulation resistance detecting unit can detect the insulation resistance value of the contact of the gas density relay, so that the insulation performance of the gas density relay is detected.
Preferably, the online verification of the gas density relays is completed by at least two gas density relays, at least two multi-way connectors, at least two temperature adjusting mechanisms, at least two online verification contact signal sampling units, an intelligent control unit and a gas density detection sensor; alternatively, the first and second electrodes may be,
the online calibration method comprises the following steps that at least two gas density relays, at least two multi-way joints, at least two temperature adjusting mechanisms, at least two online calibration contact signal sampling units, at least two intelligent control units and a gas density detection sensor are used for completing online calibration of the gas density relays; alternatively, the first and second electrodes may be,
at least two gas density relays, at least two multi-way joints, at least two temperature adjusting mechanisms, at least two online checking contact signal sampling units, at least two gas density detection sensors and an intelligent control unit are used for completing the online checking of the gas density relays.
Compared with the prior art, the technical scheme of the utility model following beneficial effect has:
the application provides an electrical system with online sampling check-up function for high-voltage electrical equipment, including electrical equipment, gas density relay, gas density detection sensor, temperature regulation mechanism, valve, online check-up contact signal sampling unit and intelligent control unit. The valve is closed through the intelligent control unit, so that the gas density relay is isolated from the electrical equipment on a gas path; temperature through temperature adjustment mechanism regulation gas density relay's temperature compensation component goes up and down, make gas density relay take place the contact action, the contact action is transmitted to the intelligence through online check-up contact signal sampling unit and is controlled the unit, the intelligence is controlled the density value when unit is moved according to the contact, detect out gas density relay's warning and/or shutting contact signal action value and/or return value, need not to increase density relay and exempt from to dismantle the check-up valve and just can realize not dismantling the check-up to density relay, and need not overhaul personnel to accomplish gas density relay's check-up work to the scene, the reliability of electric wire netting has been improved, the efficiency is improved, the cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of an electrical system with an online sampling verification function according to a first embodiment;
FIG. 2 is a schematic diagram of a control circuit of the electrical system according to the first embodiment;
fig. 3 is a schematic structural diagram of an electrical system with an online sampling verification function according to a second embodiment;
fig. 4 is a schematic structural diagram of an electrical system with an online sampling verification function according to a third embodiment;
FIG. 5 is a schematic structural diagram of an electrical system with an online sampling verification function according to a fourth embodiment;
FIG. 6 is a schematic structural diagram of an electrical system with an online sampling verification function according to a fifth embodiment;
FIG. 7 is a schematic control circuit diagram of an electrical system according to a sixth embodiment;
FIG. 8 is a schematic control circuit diagram of an electrical system according to a seventh embodiment;
FIG. 9 is a schematic control circuit diagram of an electrical system of an eighth embodiment;
FIG. 10 is a schematic control circuit diagram of an electrical system of the ninth embodiment;
fig. 11 is a control circuit schematic diagram of an electrical system of an embodiment ten;
fig. 12 is a schematic view of an air path structure of an electrical system according to an eleventh embodiment.
Detailed Description
The utility model provides an electrical system with online sampling check-up function, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following reference drawing and example are lifted the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The first embodiment is as follows:
as shown in fig. 1, an embodiment of the present invention provides an electrical system with online sampling and checking functions, including: the device comprises an electrical device 8, a gas density relay 1, a pressure sensor 2, a temperature sensor 3, a temperature adjusting mechanism 5, an online check contact signal sampling unit 6, an intelligent control unit 7, a multi-way connector 9, an air supply interface 10 and a micro water sensor 12. The gas density relay 1, the micro water sensor 12 and the air supply interface 10 are arranged on the multi-way joint 9. The probe 1201 of the micro water sensor 12 is arranged on the main air passage between the electrical equipment and the air supply interface 10; the gas density relay 1, the pressure sensor 2, the temperature sensor 3, the online check contact signal sampling unit 6 and the intelligent control unit 7 are arranged together. The temperature adjusting mechanism 5 is arranged opposite to the gas density relay 1, and the temperature sensor 3 is arranged in the shell of the density relay 1. The pressure sensor 2, the online check contact signal sampling unit 6 and the intelligent control unit 7 can be arranged on the density relay 1. The temperature adjustment mechanism 5 is disposed outside the density relay 1. Specifically, the density relay 1 is communicated with the electrical equipment 8 through a multi-way connector 9; the pressure sensor 2 is communicated with the gas density relay 1 on a gas path; the online check contact signal sampling unit 6 is respectively connected with the gas density relay 1 and the intelligent control unit 7; the pressure sensor 2, the temperature sensor 3 and the temperature adjusting mechanism 5 are respectively connected with an intelligent control unit 7; the air supply interface 10 is communicated with the multi-way joint 9.
Specifically, the electric apparatus 8 is provided with a gas chamber inside thereof, and the gas chamber is filled with an insulating gas. The multi-way joint 9 is hermetically connected to the electrical equipment 8 and communicated with an air chamber of the electrical equipment 8, and the electrical equipment 8 is communicated with the gas density relay 1 through the multi-way joint 9; the pressure sensor 2 is communicated with the gas density relay 1 on a gas path; the air supply interface 10 is communicated with the multi-way joint 9.
The temperature adjusting mechanism 5 is configured to adjust the temperature rise and fall of the temperature compensation element of the gas density relay 1, so that the gas density relay 1 generates contact action; the online check contact signal sampling unit 6 is connected with the gas density relay 1 and is configured to sample a contact signal of the gas density relay 1; wherein the contact signal comprises an alarm and/or a latch; the temperature adjusting mechanism 5 mainly comprises a heating element 501, a heat preservation member 502, a controller 504, a temperature detector 3 (same as a temperature sensor), a temperature adjusting mechanism shell 503 and the like. The controller 504 may use PID control, or a combination of PID and fuzzy control. The range of power for the heating element 501 to electrically heat the work is controlled by the controller 504 and the temperature rise and fall range setting. The variation amplitude of the temperature is controlled by different power levels. The degree of deviation may be set to advance heating or cooling. The temperature in the temperature adjusting mechanism 5 is measured through the intelligent control unit 7 and the controller 504, when the action value of the contact signal of the gas density relay 1 is measured, the temperature change speed is not more than 1.0 ℃ per second (even not more than 0.5 ℃ per second) when the action value is approached, or the requirement is set according to the requirement), namely the temperature requirement is steadily increased or decreased.
The working principle is as follows:
the temperature of the gas density relay 1 and then the temperature compensation element of the gas density relay are increased by the operation or control of the temperature adjusting mechanism 5 by the intelligent control unit 7, and the temperature change speed is not more than 1.0 ℃ per second (even not more than 0.5 ℃ per second) when the temperature is close to the action value, or the requirement is set according to the requirement), namely, the temperature requirement is stably increased (or decreased). Until the gas density relay 1 takes place the contact action, the contact action is transmitted to intelligence through online check contact signal sampling unit 6 and is controlled unit 7, and intelligence is controlled unit 7 and is obtained gas density value according to pressure value, the temperature value when the contact action, or directly obtains gas density value, detects out the contact signal action value of gas density relay 1, accomplishes the check-up work of the contact signal action value of gas density relay 1. For example, for a gas density relay with density relay parameters of 0.6/0.52/0.50MPa (rated value of 0.6 MPa/alarm pressure value of 0.52 MPa/alarm pressure value of 0.50MPa, relative pressure), when the ambient temperature is 5 ℃, the gas pressure of the gas chamber of the electrical equipment 8 is 0.5562MPa (relative pressure), at this time, in the verification system, the pressure value is unchanged, when the temperature rises to 29.5 ℃, the alarm contact thereof operates, the intelligent control unit 7 can obtain an alarm contact operating value 0.5317MPa (relative pressure) of the gas density relay according to the pressure value 0.5562MPa (relative pressure) and the temperature value of 29.5 ℃ when the contact operates, and the intelligent control unit 7 can obtain the error of the alarm contact operating value: and 0.0117MPa (0.5317MPa-0.52MPa is 0.0117MPa), and the checking of the alarm contact action value of the density relay is completed.
The temperature of the gas density relay 1 is reduced by operating or controlling the temperature adjusting mechanism 5 through the intelligent control unit 7, and then the temperature of a temperature compensation element of the gas density relay 1 is reduced, so that the contact point resetting of the gas density relay occurs, the contact point resetting is transmitted to the intelligent control unit 7 through the contact point signal sampling unit 6, the intelligent control unit 7 obtains a gas density value according to a pressure value and a temperature value when the contact point is reset, or directly obtains the gas density value, the contact point signal return value of the gas density relay is detected, and the checking work of the contact point signal return value of the gas density relay is completed; for example, for the gas density relay with the density relay parameter of 0.6/0.52/0.50MPa (rated value of 0.6 MPa/alarm pressure value of 0.52 MPa/alarm pressure value of 0.50MPa, relative pressure), when the ambient temperature is 5 ℃, the gas pressure in the electrical equipment 8 is 0.5562MPa (relative pressure), and also in the verification system at this time, the pressure value is unchanged, when the temperature is reduced to 24.8 ℃, the alarm contact is reset, the intelligent control unit 7 can obtain the return value 0.5435MPa (relative pressure) of the alarm contact of the gas density relay according to the pressure value 0.5562MPa (relative pressure) and the temperature value of 24.8 ℃ when the contact is reset, and the intelligent control unit 7 can obtain the switching difference of the alarm contact: 0.0118MPa (0.5435-0.5317 MPa is 0.0118MPa), thus completing the verification of the alarm contact action value of the density relay 1. The intelligent control unit 7 can determine the performance condition (such as pass or fail) of the verified gas density relay according to the requirement and the verification result (verification data).
After all the contact signal verification operations are completed, the heating element 501 of the temperature adjustment mechanism 5 is turned off by the intelligent control unit 7.
Fig. 2 is a schematic diagram of a control circuit of an electrical system with an online sampling and checking function according to an embodiment of the present invention. As shown in fig. 2, the online verification contact signal sampling unit 6 of the present embodiment is provided with a protection circuit, which includes a first connection circuit and a second connection circuit, the first connection circuit connects the contact of the gas density relay 1 and the contact signal control circuit, the second connection circuit connects the contact of the gas density relay 1 and the intelligent control unit 7, and in a non-verification state, the second connection circuit is disconnected, and the first connection circuit is closed; under the check-up state, 6 cutting offs of online check-up contact signal sampling unit first connecting circuit, intercommunication second connecting circuit will gas density relay 1's contact with unit 7 is controlled to the intelligence is connected.
Specifically, the first connection circuit includes a first relay J1, and the second connection circuit includes a second relay J2. The first relay J1 is provided with a normally closedContacts J11 and J12, the normally closed contacts J11 and J12 connected in series in the contact signal control loop; the second relay J2 is provided with normally open contacts J21 and J22, and the normally open contacts J21 and J22 are connected at a contact P of the gas density relay 1JThe above step (1); the first relay J1 and the second relay J2 may be integrated into a single unit, i.e., a relay having normally open and normally closed contacts. In a non-verification state, the normally closed contacts J11 and J12 are closed, the normally open contacts J21 and J22 are opened, and the gas density relay monitors the contact P in real timeJThe output state of (1); in the verification state, the normally closed contacts J11 and J12 are opened, the normally open contacts J21 and J22 are closed, and the contact P of the gas density relay 1 is closedJThe intelligent control unit 7 is connected with the normally open contacts J21 and J22.
Intelligence accuse unit 7 respectively with gas density detection sensor (pressure sensor 2 and temperature sensor 3), temperature regulation mechanism 5 with online check-up contact signal sampling unit 6 is connected, is configured to the completion temperature regulation mechanism 5's control, pressure value collection and temperature value collection and/or gas density value collection, and detect gas density relay's contact signal action value and/or contact signal return value. The intelligent control unit 7 mainly comprises a processor 71(U1) and a power supply 72 (U2). The processor 71(U1) may be a general-purpose computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, an MCU, an FPGA, a PLC, etc., an industrial control motherboard, an embedded main control board, etc., and other intelligent integrated circuits. The power source 72(U2) may be a switching power supply, ac 220V, dc power supply, LDO, programmable power supply, solar, battery, rechargeable battery, or the like. The pressure sensor 2 of the pressure acquisition P may be: pressure sensors, pressure transmitters, and the like. The temperature sensor 3 of the temperature acquisition T may be: various temperature sensing elements such as temperature sensors and temperature transmitters; can be as follows: a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be thermal resistance and thermocouple; can be digital type and analog type, such as DS18B20, pt 100. The temperature adjusting mechanism 5 is a heating element; or the temperature regulating mechanism mainly comprises a heating element, a heat preservation piece, a controller, a temperature detector, a temperature regulating mechanism shell and the like; or the temperature adjusting mechanism mainly comprises a heating element and a temperature controller; the controller includes, but is not limited to, one of a PID controller, a PID and fuzzy controller combined controller, a variable frequency controller, and a PLC controller.
The working principle is as follows:
the intelligent control unit 7 monitors the gas pressure P and the temperature T of the electrical equipment according to the pressure sensor 2 and the temperature sensor 3 to obtain a corresponding 20 ℃ pressure value P20(i.e., gas density value). When it is necessary to verify the gas density relay 1, if the gas density value P is present20Not less than set safety check density value PS。
Next, the intelligent control unit 7 controls to open the contact signal control circuit of the gas density relay 1, that is, the normally closed contacts J11 and J12 of the first relay J1 of the online verification contact signal sampling unit 6 are opened, so that the safe operation of the electrical equipment 8 is not affected when the gas density relay 1 is verified online, and an alarm signal is not mistakenly sent or the control circuit is locked when the gas density relay is verified. Since the gas density value P is already carried out before the start of the calibration20Not less than set safety check density value PSThe gas of the electrical equipment 8 is in a safe operation range, and the gas leakage is a slow process and is safe during verification. Meanwhile, the contact sampling circuit of the contact of the gas density relay 1 is communicated through the intelligent control unit 7, namely the normally open contacts J21 and J22 of the second relay J2 of the online check contact signal sampling unit 6 are closed, and the contact P of the gas density relay 1 is closed at the momentJThe smart control unit 7 is connected through the normally open contacts J21 and J22 of the second relay J2.
Then, by the operation or control of the temperature adjusting mechanism 5 by the intelligent control unit 7, the temperature of the gas density relay 1 is increased, and further the temperature of the temperature compensation element of the gas density relay is increased, and the temperature change speed is not more than 1.0 ℃ per second (even not more than 0.5 ℃ per second) when the action value is approached, or the requirement is set according to the requirement), namely, the temperature requirement is smoothly increased. Until the gas density relay 1 generates a contact signal action, itThe contact signal action is uploaded to the intelligent control unit 7 through a second relay J2 of the online checking contact signal sampling unit 6, the intelligent control unit 7 converts a pressure value P and a temperature value T measured according to the contact signal action into a pressure value P20 (density value) corresponding to 20 ℃ according to gas characteristics, and then the contact action value P of the gas density relay can be detectedD20. After the action values of the contact signals of the alarm and/or locking signals of the gas density relay 1 are detected, the intelligent control unit 7 is used for operating or controlling the temperature adjusting mechanism 5, so that the temperature of the gas density relay 1 is reduced, the temperature of the temperature compensating element of the gas density relay 1 is reduced, the contact resetting of the gas density relay is realized, and the return value of the alarm and/or locking contact signals of the gas density relay 1 is tested. The verification is repeated for multiple times (for example, 2 to 3 times), and then the average value of the verification is calculated, so that the verification work of the gas density relay is completed.
After the verification is finished, the normally open contacts J21 and J22 of the second relay J2 of the online verification contact signal sampling unit 6 are disconnected, and the contact P of the gas density relay 1 is disconnected at the momentJThe smart control unit 7 is disconnected by opening the normally open contacts J21 and J22 of the second relay J2. The heating element 501 of the temperature regulating mechanism 5 is switched off by the intelligent control unit 7. Then, the normally closed contacts J11 and J12 of the first relay J1 of the online check contact signal sampling unit 6 are closed, the contact signal control loop of the gas density relay 1 works normally, and the gas density relay monitors the gas density of the electrical equipment 8 safely, so that the electrical equipment 8 works safely and reliably. Therefore, the online calibration of the gas density relay is conveniently completed, and the safe operation of the electrical equipment 8 is not influenced.
When the gas density relay 1 (or the density monitoring device) completes the verification work, the electric system judges and can inform the detection result. The mode is flexible, and particularly can be as follows: 1) the electrical system may be annunciated locally, such as by indicator lights, digital or liquid crystal displays, etc.; 2) or uploading is implemented through an online remote transmission communication mode, for example, the information can be uploaded to a background of an online monitoring system; 3) or uploading the data to a specific terminal through wireless uploading, for example, a mobile phone can be uploaded wirelessly; 4) or uploaded by another route; 5) or the abnormal result is uploaded through an alarm signal line or a special signal line; 6) uploading alone or in combination with other signals. In short, after the on-line verification work of the gas density relay 1 is completed, if an abnormality occurs, an alarm can be automatically sent out, and the alarm can be uploaded to a remote end or can be sent to a designated receiver, such as a mobile phone. Or, after the verification work is completed, if the verification work is abnormal, the intelligent control unit 7 can upload the alarm contact signals of the gas density relay 1 to a remote end (a monitoring room, a background monitoring platform and the like) and can display the notice on site. Simple version on-line verification can upload the result of abnormal verification through an alarm signal line. The alarm signal can be uploaded according to a certain rule, for example, when the alarm signal is abnormal, a contact is connected in parallel with an alarm signal contact and is regularly closed and opened, and the condition can be obtained through analysis; or through a separate verification signal line. The intelligent mobile phone can be uploaded in good state or in problem, or can be uploaded through remote density on-line monitoring, or can upload a verification result through a single verification signal line, or can be uploaded through on-site display, on-site alarm or wireless uploading and can be uploaded through the internet with the intelligent mobile phone. The communication mode is wired or wireless, and the wired communication mode CAN be industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carrier and the like; the wireless communication mode can be 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar, a 5G/NB-IOT communication module with a built-in sensor (such as NB-IOT) and the like. In a word, the reliable performance of the electric system can be fully ensured in multiple modes and various combinations.
The electric system has a safety protection function, namely when the electric system is lower than a set value, the electric system automatically does not perform online verification on the gas density relay 1 any more, and sends out an informing signal. For example, when it is detected that the gas density value is less than the set value PSThen, checking is not performed; only when the gas density value is more than or equal to (alarm pressure value +0.02MPa), the online verification can be carried out.
The electrical system may perform online verification according to a set time, or may perform online verification according to a set temperature (e.g., a high limit temperature, a high temperature, a low limit temperature, a low temperature, a normal temperature, 20 degrees, etc.). When the environment temperature of high temperature, low temperature, normal temperature and 20 ℃ is checked on line, the error judgment requirements are different, for example, when the environment temperature of 20 ℃ is checked, the accuracy requirement of the gas density relay can be 1.0 level or 1.6 level, and when the environment temperature is high, the accuracy requirement can be 2.5 level. The method can be implemented according to the relevant standard according to the temperature requirement. For example, according to 4.8 temperature compensation performance regulations in DL/T259 sulfur hexafluoride gas density relay calibration code, the accuracy requirement corresponding to each temperature value is met.
The electrical system can compare the error performance of the gas density relay 1 at different temperatures and different time periods. That is, the performance of the gas density relay 1 and the electrical equipment 8 is determined by comparison in the same temperature range at different times, and comparison between the history and the present time is made.
The electrical equipment can be repeatedly verified for a plurality of times (for example, 2 to 3 times), and the average value of the verification results is calculated according to each time. When necessary, the gas density relay 1 can be checked online at any time.
Wherein, gas density relay 1 includes: a bimetallic strip compensated gas density relay, a gas compensated gas density relay, or a bimetallic strip and gas compensated hybrid gas density relay; a fully mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay; a density relay with indication (a density relay displayed by a pointer, a density relay displayed by a digital code, a density relay displayed by a liquid crystal) and a density relay without indication (namely a density switch); SF6 gas density relay, SF6 hybrid gas density relay, N2 gas density relay, other gas density relays, and the like.
Type of pressure sensor 2: absolute pressure sensors, relative pressure sensors, or both absolute and relative pressure sensors, may be several in number. The pressure sensor can be in the form of a diffused silicon pressure sensor, a MEMS pressure sensor, a chip pressure sensor, a coil-induced pressure sensor (e.g., a pressure measurement sensor with induction coil attached to a bawden tube), or a resistive pressure sensor (e.g., a pressure measurement sensor with slide wire resistance attached to a bawden tube). The pressure sensor can be an analog pressure sensor or a digital pressure sensor. The pressure sensor is a pressure sensor, a pressure transmitter, and other pressure-sensitive elements, such as diffused silicon, sapphire, piezoelectric, and strain gauge (resistance strain gauge, ceramic strain gauge).
The temperature sensor 3 may be: a thermocouple, a thermistor, a semiconductor type; contact and non-contact can be realized; can be a thermal resistor and a thermocouple. In short, the temperature acquisition can be realized by various temperature sensing elements such as a temperature sensor, a temperature transmitter and the like.
The temperature adjusting mechanism 5 is a heating element; or the temperature regulating mechanism mainly comprises a heating element, a heat preservation piece, a controller, a temperature detector, a temperature regulating mechanism shell and the like; or the temperature adjusting mechanism mainly comprises a heating element and a temperature controller; or the temperature adjusting mechanism mainly comprises a heating element, a heating power adjuster and a temperature controller; or the temperature adjusting mechanism mainly comprises a heating element, a refrigerating element, a power regulator and a temperature controller; or the temperature adjusting mechanism mainly comprises a heating element, a heating power adjuster and a constant temperature controller; or the temperature adjusting mechanism mainly comprises a heating element, a controller, a temperature detector and the like; or the temperature adjusting mechanism is a heating element which is arranged near the temperature compensation element; or the temperature adjusting mechanism is a micro constant temperature box; the heating element comprises but is not limited to a silicon rubber heater, a resistance wire, an electric heating belt, an electric heating rod, a hot air blower, an infrared heating device and a semiconductor; the heating element consists of a plurality of heating element groups; the controller includes, but is not limited to, one of a PID controller, a PID and fuzzy controller combined controller, a variable frequency controller, and a PLC controller.
The online check contact signal sampling unit 6 mainly completes contact signal sampling of the gas density relay 1. Namely, the basic requirements or functions of the online verification contact signal sampling unit 6 are as follows: 1) the safe operation of the electrical equipment is not influenced during the verification. When the contact signal of the gas density relay 1 acts during the calibration, the safe operation of the electrical equipment is not influenced; 2) the contact signal control loop of the gas density relay 1 does not influence the performance of the gas density relay, particularly does not influence the performance of the intelligent control unit 7, and does not cause the gas density relay to be damaged or influence the test work.
The basic requirements or functions of the intelligent control unit 7 are as follows: the control of the valve 4, the control of the temperature regulating mechanism 5 and the pressure regulating mechanism 11 and the signal acquisition are completed through the intelligent control unit 7. The realization is as follows: the pressure value and the temperature value when the contact signal of the gas density relay 1 is detected to act can be converted into the corresponding pressure value P at 20 DEG C20(density value), that is, contact operating value P of gas density relay 1 can be detectedD20And the checking work of the gas density relay 1 is completed. Alternatively, the density value P at the time of the contact signal operation of the gas density relay 1 can be directly detectedD20And the checking work of the gas density relay 1 is completed.
Of course, the intelligent control unit 7 can also realize: completing test data storage; and/or test data derivation; and/or the test data may be printed; and/or can be in data communication with an upper computer; and/or analog quantity and digital quantity information can be input. The intelligent control unit 7 further comprises a communication module, and the information such as test data and/or verification results is transmitted in a long distance through the communication module; when the rated pressure value of the gas density relay 1 outputs a signal, the intelligent control unit 7 simultaneously collects the current density value, and the calibration of the rated pressure value of the gas density relay 1 is completed.
Electrical equipment including SF6 gas electrical equipment, SF6 mixed gas electrical equipment, environmentally friendly gas electrical equipment, or other insulated gas electrical equipment. Specifically, the electrical equipment includes GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas insulated cabinets, ring main units, and the like.
The electrical system has pressure and temperature measurement and software conversion functions. On the premise of not influencing the safe operation of the electrical equipment 8, the alarm and/or locking contact action value and/or return value of the gas density relay 1 can be detected on line. Of course, the return value of the alarm and/or latch contact signal may not need to be tested as desired.
When the electric system accomplishes the check-up of gas density relay, can carry out the mutual contrast judgement automatically, if the error phase difference is big, will send unusual suggestion: gas density relays or pressure sensors, temperature sensors have problems. Namely, the electric system can complete the mutual checking function of the gas density relay, the pressure sensor, the temperature sensor or the density transmitter, and has the capability of artificial intelligence checking; after the verification work is finished, a verification report can be automatically generated, and if the verification report is abnormal, an alarm can be automatically sent out or sent to a specified receiver, for example, a mobile phone; the gas density value and the verification result are displayed on site or on the background, and the specific mode can be flexible; the system has the functions of real-time online gas density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the like; the gas density value, or the gas density value, the pressure value and the temperature value can be monitored on line; the self-diagnosis function is provided, and abnormal and timely notices such as line breakage, short circuit alarm, sensor damage and the like can be notified; the comparison of the error performance of the electrical system can be performed at different temperatures and different time periods. I.e., comparisons at different times and over the same temperature range, a determination is made as to the performance of the electrical system. The comparison of each period with history and the comparison of the history and the present are carried out. The normal and abnormal judgment, analysis and comparison can be carried out on the gas density value of the electrical equipment 8, the gas density relay 1, the pressure sensor 2 and the temperature sensor 3; the system also comprises an analysis system (expert management analysis system) for detecting, analyzing and judging the gas density monitoring, the gas density relay and the monitoring element to know where the problem points are; the contact signal state of the gas density relay 1 is also monitored and transmitted remotely. The contact signal state of the gas density relay 1 can be known to be open or closed at the background, so that one more layer of monitoring is provided, and the reliability is improved; the temperature compensation performance of the gas density relay 1 can be detected, or detected and judged; the contact resistance of the contact point of the gas density relay 1 can be detected or detected and judged; the system has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on the electrical equipment 8. The electrical device 8 is monitored on-line for gas density.
As long as the test data among the pressure sensor 2, the temperature sensor 3 and the gas density relay 1 are consistent and normal, the electrical system can be indicated to be normal, the gas density relay does not need to be checked, other devices do not need to be checked, and the checking can be avoided in the whole service life. Unless the test data of the pressure sensor 2, the temperature sensor 3 and the gas density relay 1 of a certain electrical device in the transformer substation are inconsistent and abnormal, the maintenance personnel are arranged to process the data. The identical and normal conditions do not need to be checked, so that the reliability is greatly improved, the efficiency is greatly improved, and the cost is reduced.
Example two:
as shown in fig. 3, the second embodiment of the present invention provides an electrical system with online sampling and checking functions, including: the gas density relay comprises a gas density relay 1, a pressure sensor 2, a temperature sensor 3, a valve 4, a temperature adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7, a multi-way connector 9, an air supplementing interface 10 and a pressure adjusting mechanism 11. One end of the valve 4 is hermetically connected to an electrical device 8, and the other end of the valve 4 is connected to a multi-way connector 9. The gas density relay 1 is arranged on the multi-way joint 9; the pressure sensor 2 and the temperature sensor 3 are arranged on the gas density relay 1, and the pressure sensor 2 is communicated with the gas density relay 1 on a gas path; the temperature adjusting mechanism 5 is arranged on the density relay 1; the temperature adjusting mechanism 5 mainly comprises a heating element 501 and is controlled by an intelligent control unit 7, that is, a controller of the heating element 501 is arranged or designed together with the intelligent control unit 7. The pressure adjusting mechanism 11 is arranged on the multi-way joint 9, and the pressure adjusting mechanism 11 is communicated with the gas density relay 1; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. And the pressure sensor 2, the temperature sensor 3, the valve 4, the temperature adjusting mechanism 5 and the pressure adjusting mechanism 11 are respectively connected with the intelligent control unit 7. The air supply interface 10 is communicated with the multi-way joint 9.
Unlike the first embodiment, the present embodiment further includes a pressure adjustment mechanism 11. The pressure adjusting mechanism 11 includes a piston 1101, a driving mechanism 1102, and a sealing ring 1110, and the driving mechanism 1102 drives the piston 1101 to move in the pressure adjusting mechanism, thereby completing the pressure lifting.
The working principle is as follows: the online checking contact signal sampling unit 6 is adjusted to a checking state through the intelligent control unit 7, and in the checking state, the online checking contact signal sampling unit 6 cuts off a control loop of a contact signal of the gas density relay 1 and connects the contact of the gas density relay 1 to the intelligent control unit 7; and closing the valve 4 between the gas density relay 1 and the electrical equipment through the intelligent control unit 7; the pressure adjusting mechanism 11 is driven by the intelligent control unit 7, so that the pressure of the gas density relay is slowly reduced, and after the pressure is reduced to a target pressure value, the operation can be stopped. Next, the temperature of the gas density relay 1 is increased by operating or controlling the temperature adjusting mechanism 5 by the intelligent control unit 7, and then the temperature of the temperature compensation element of the gas density relay is increased, so that the gas density relay generates a contact action, the contact action is transmitted to the intelligent control unit 7 through the online checking contact signal sampling unit 6, the intelligent control unit 7 obtains a gas density value according to a pressure value and a temperature value when the contact is acted, or directly obtains the gas density value, detects a contact signal action value of the gas density relay, and completes the checking operation of the contact signal action value of the gas density relay, which is similar to the first embodiment. The intelligent control unit 7 further comprises a depth calculation unit which can calculate the depth of the electrical equipment according to the environmental temperature value, the gas density value or the pressure value of the electrical equipment,
through the operation or control of intelligence accuse unit 7 to temperature regulation mechanism 5, make the temperature of gas density relay 1 reduce, and then the temperature reduction of the temperature compensation component of gas density relay, make gas density relay take place the contact and reset, the contact resets and transmits intelligence accuse unit 7 through online check-up contact signal sampling unit 6, intelligence accuse unit 7 is according to the pressure value when the contact resets, the temperature value obtains gas density value, or directly obtain gas density value, detect out gas density relay's contact signal return value, accomplish the check-up work of gas density relay's contact signal return value.
After all contact signal check-up work is accomplished, through 7 shutoff temperature adjustment mechanism's of intelligent accuse heating element of unit to adjust to operating condition with online check-up contact signal sampling unit 6, the normal operating condition of operation is resumed to the control circuit of gas density relay's contact signal. In this embodiment, the operation sequence of the temperature adjusting mechanism and the pressure adjusting mechanism can be flexible, that is, the pressure adjusting mechanism can be operated first, and then the temperature adjusting mechanism can be operated; or the temperature adjusting mechanism can be operated firstly, and then the pressure adjusting mechanism can be operated; or the pressure adjustment mechanism and the temperature adjustment mechanism may be operated simultaneously.
The valve 4 can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic hydraulic, electrohydraulic, pneumatic hydraulic, spur gear and bevel gear drive; the valve can be operated according to the preset requirement under the action of pressure, temperature or other forms of sensing signals, or can be simply opened or closed without depending on the sensing signals, and the valve can make the opening and closing piece perform lifting, sliding, swinging or rotating motion by depending on a driving or automatic mechanism, so that the size of the flow passage area of the valve can be changed to realize the control function of the valve. The valve 4 can be driven by automatic valves, power-driven valves and manual valves. And the automatic valve may include: electromagnetic drive, electromagnetic-hydraulic drive, electro-hydraulic drive, turbine drive, spur gear drive, bevel gear drive, pneumatic drive, hydraulic drive, gas-hydraulic drive, electric motor (motor) drive. The valve 4 may be automatic or manual, semi-automatic. The verification process can be automatically completed or semi-automatically completed through manual cooperation. The valve 4 is connected, integrated or separated, directly or indirectly with the electrical apparatus 8 by means of a self-sealing valve, a manual valve, or a non-removable valve. The valve 4 may be normally open or normally closed, or may be unidirectional or bidirectional, as desired. In short, the air passage is opened or closed through the electric control valve. The electric control valve can adopt the following modes: electromagnetic valve, electric control ball valve, electric control proportional valve, etc. The valve 4 may be: solenoid valves, electric valves, pneumatic valves, ball valves, needle valves, regulating valves, shut-off valves, etc. can open and close the gas circuit and even the elements controlling the flow. Semi-automatic may also be a manual valve. The pressure adjusting mechanism 11 may be: electric regulating piston, electric regulating cylinder, booster pump, gas cylinder pressurization, valve, electromagnetic valve and flow controller. Semi-automatic pressure adjustment mechanisms that can also be adjusted manually.
The pressure adjusting mechanism 5 of this embodiment is one end open-ended cavity, there is piston 1101 in the cavity, piston 1101 is equipped with sealing washer 1110, the one end of piston 1101 is connected with an adjusting rod, drive unit 1102 is connected to the outer end of adjusting rod, the other end of piston 1101 stretches into in the opening, and with the inner wall of cavity contacts, drive unit 1102 drive adjust the pole and then drive piston 1101 is in the intracavity removes. The driving component 1102 includes, but is not limited to, one of a magnetic force, a motor (variable frequency motor or stepper motor), a reciprocating mechanism, a carnot cycle mechanism, and a pneumatic element.
Example three:
as shown in fig. 4, the third embodiment of the present invention provides an electrical system with online sampling and checking functions, including: the gas density relay comprises a gas density relay 1, a first pressure sensor 21, a second pressure sensor 22, a first temperature sensor 31, a second temperature sensor 32, a temperature adjusting mechanism 5, an online checking joint signal sampling unit 6, an intelligent control unit 7, a multi-way joint 9, an air supply interface 10 and a self-sealing valve 11. One end of the self-sealing valve 11 is connected to the electrical equipment in a sealing manner, and the other end of the self-sealing valve 11 is connected with the multi-way connector 9. The gas density relay 1, the second pressure sensor 22, the second temperature sensor 32, the temperature adjusting mechanism 5 and the gas supplementing interface 10 are arranged on the multi-way joint 9; the first pressure sensor 21 and the first temperature sensor 31 are provided in the gas density relay 1. The first pressure sensor 21, the second pressure sensor 22, the first temperature sensor 31 and the second temperature sensor 32 are respectively connected with the intelligent control unit 7. The first pressure sensor 21, the second pressure sensor 22 and the gas density relay 1 are communicated on a gas path.
Different from the first embodiment, there are two pressure sensors, namely a first pressure sensor 21 and a second pressure sensor 22; the number of the temperature sensors is two, namely a first temperature sensor 31 and a second temperature sensor 32. The present embodiment provides a plurality of pressure sensors and temperature sensors for the purpose of: the pressure values monitored by the first pressure sensor 21 and the second pressure sensor 22 can be compared and verified with each other; the temperature values monitored by the first temperature sensor 31 and the second temperature sensor 32 can be compared and verified with each other; the density value P1 obtained by monitoring the first pressure sensor 21 and the first temperature sensor 3120A density value P2 monitored with the second pressure sensor 22 and the second temperature sensor 3220Comparing and checking each other; even the density value Pe of the rated value of the gas density relay 1 can be checked on line20And comparing and checking each other.
In addition, in the technology of the present invention, there are two pressure sensors, which are respectively a first pressure sensor 21 and a second pressure sensor 22; the number of the temperature sensors is two, namely a first temperature sensor 31 and a second temperature sensor 32. The first pressure sensor 21 and the second pressure sensor 22 are respectively provided on both sides of the multi-way joint 9 or on both ends of the valve 4. Make the utility model discloses the technique has the safety protection function, specifically is: 1) when the density values monitored by the first pressure sensor 21 and the first temperature sensor 31 or the second pressure sensor 22 and the second temperature sensor 32 are lower than the set values, the gas density relay automatically does not verify the gas density relay 1 any more, and sends out a notification signal. For example, when the gas density value of the plant is less than the set value, it is not verified. The check can only be carried out when the gas density value of the equipment is not less than (blocking pressure +0.02 MPa). The contact point alarms and has a status indication. 2) Or during verification, when the valve 4 is closed, according to the second pressure sensor 22 and the second temperature sensorWhen the density value monitored by the device 32 is lower than the set value, the gas density relay automatically does not check the gas density relay 1 any more, and simultaneously sends out an alarm signal (gas leakage). For example, when the gas density value of the plant is less than the set value (lock pressure +0.02MPa), it is not verified. The set value can be set arbitrarily as required. Meanwhile, the gas density relay is also provided with a plurality of pressure sensors and temperature sensors for mutual verification, and the sensors and the gas density relay are mutually verified, so that the gas density relay is ensured to normally work. Namely, the pressure values monitored by the first pressure sensor 21 and the second pressure sensor 22 are compared and verified with each other; comparing the temperature values obtained by monitoring by the first temperature sensor 31 and the second temperature sensor 32, and checking each other; the density value P1 obtained by monitoring the first pressure sensor 21 and the first temperature sensor 3120A density value P2 monitored with the second pressure sensor 22 and the second temperature sensor 3220Comparing and checking each other; it is even possible to verify the density value Pe of the nominal value of the gas density relay 120And comparing and checking each other.
Example four:
as shown in fig. 5, a fourth embodiment of the present invention provides an electrical system with online sampling and checking functions, including: the device comprises a gas density relay 1, a pressure sensor 2, a temperature sensor 3, a valve 4, a temperature adjusting mechanism 5 (mainly comprising a heating element 501, a heat preservation piece 502 and a temperature adjusting mechanism shell 503), an online checking contact signal sampling unit 6, an intelligent control unit 7, electrical equipment 8, a multi-way connector 9, an air supply interface 10, a pressure adjusting mechanism 11 and a micro-water sensor 12. One end of the valve 4 is hermetically connected to the electrical equipment 8, and the other end of the self-sealing valve 4 is communicated with the multi-way joint 9; and the gas outlet of the valve 4 is communicated with the gas density relay 1, the pressure sensor 2, the pressure regulating mechanism 11 and the gas supplementing interface 10 on a gas path through the multi-way joint 9. The pressure sensor 2 and the temperature sensor 3 are arranged together and can be combined into a gas density transmitter to directly obtain a gas density value, a pressure value and a temperature value; the pressure regulating mechanism 11 is communicated with the gas density relay 1 through a multi-way joint 9; the online check joint signal sampling unit 6 and the intelligent control unit 7 are arranged together. The pressure sensor 2 and the temperature sensor 3 are directly or indirectly connected with the intelligent control unit 7; the valve 4 is connected with an intelligent control unit 7; the temperature adjusting mechanism 5 and the pressure adjusting mechanism 11 are connected with the intelligent control unit 7.
The difference from the first embodiment is that:
1) the pressure adjusting mechanism 11 of the present embodiment is mainly composed of a gas chamber 1107, a heater 1108, a heat insulating member 1109, and a housing 1111. Pressure adjustment mechanism 11 is according to the control of intelligence accuse unit 7 for air chamber 1107 changes temperature, and seal chamber takes place pressure variation, and then accomplishes the lift of pressure.
2) The pressure sensor 2 and the temperature sensor 3 are arranged together to form a gas density transmitter, and the density value, the pressure value and the temperature value of the gas are directly obtained. Adjust temperature and pressure adjustment mechanism 11 through this temperature adjustment mechanism 5 and adjust pressure for gas density relay 1 takes place the contact action, and the contact action is transmitted to intelligence accuse unit 7 through online check-up contact signal sampling unit 6, and intelligence accuse unit 7 is according to the density value when gas density relay 1's contact action, even pressure value and temperature value, detects gas density relay 1's warning and/or shutting contact action value and/or return value, accomplishes the check-up work to gas density relay 1. Or only the alarm and/or the locking contact action value of the gas density relay 1 is detected, and the checking work of the gas density relay 1 is completed.
Example five:
as shown in fig. 6, a fifth embodiment of the present invention provides an electrical system with online sampling and checking functions, including: the gas density relay system comprises a gas density relay 1, a pressure sensor 2, a temperature sensor 3, a valve 4, a temperature adjusting mechanism 5, an online checking contact signal sampling unit 6, an intelligent control unit 7, electrical equipment 8, a multi-way connector 9 and an air supplementing interface 10.
And in a normal working state, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment, and meanwhile, the gas density relay or the gas density monitoring device monitors the gas density value in the electrical equipment on line through the gas density detection sensor and the intelligent control unit. The intelligent control unit or the gas density relay is used for controlling the gas density relay according to the set verification time or/and the verification instruction and the gas density value condition or/and the temperature value condition under the condition that the gas density relay is allowed or/and can be verified:
the contact signal sampling unit 6 is adjusted to a checking state through the intelligent control unit 7, and in the checking state, the contact signal sampling unit cuts off a control loop of a contact signal of the gas density relay and connects the contact of the gas density relay to the intelligent control unit; the temperature of the gas density relay is increased by controlling the temperature adjusting mechanism 5 through the intelligent control unit 7, and after the temperature reaches a set value, the valve 4 is closed through the intelligent control unit 7; after the temperature or the pressure of the gas density relay 1 is reduced to be proper, the temperature of the gas density relay is increased by controlling the temperature adjusting mechanism 5 through the intelligent control unit 7, and then the temperature of a temperature compensation element of the gas density relay is increased, so that the gas density relay generates contact action, the contact action is transmitted to the intelligent control unit through the contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value when the contact is acted, or directly obtains the gas density value, the contact signal action value of the gas density relay is detected, and the verification work of the contact signal action value of the gas density relay is completed; after all contact signal check-up work is accomplished, the intelligence is controlled the unit and is opened the valve to and the intelligence is controlled the unit and is shut off temperature regulation mechanism.
Example six:
as shown in fig. 7, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit. In this embodiment, the contact sampling circuit includes a photo coupler OC1 and a resistor R1, and the photo coupler OC1 includes a light emitting diode and a photo transistor; the anode of the light emitting diode and the contact point P of the gas density relay 1JAre connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of the phototriode is connected with the intelligent control unit 7 as the output end out6 of the on-line check contact signal sampling unit 6, and the collector of the phototriode is also connected with the intelligent control unitThe resistor R1 is connected to a power source.
By the contact sampling circuit, the contact P of the gas density relay 1 can be known convenientlyJWhether open or closed. Specifically, when the contact point P isJWhen the light-emitting diode is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level; when the contact point P isJWhen the LED is disconnected, the closed loop is disconnected, the LED does not emit light, the phototriode is cut off, and the collector of the phototriode outputs high level. Thus, the high and low levels are output through the output terminal out6 of the line verification contact signal sampling unit 6.
In the embodiment, the intelligent control unit 7 is isolated from the contact signal control loop by a photoelectric isolation method, and the contact P is closed in the verification processJOr contact P in the event of gas leakageJA shutdown also occurs, at which time a low level of the collector output of the phototransistor is detected. Controlling the closing of the contact P during the verification processJIs within a predetermined length so that the contact point P is checked without leakageJThe length of the duration time of the closed state is determined, and whether the contact P occurs in the verification process can be judged by monitoring the duration time of the received low levelJAnd closing. Therefore, the alarm signal generated by the gas density relay 1 during verification can be judged by recording the time during verification, and is not the alarm signal generated during gas leakage.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1) and a power supply 72 (U2).
Example seven:
as shown in fig. 8, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit, and in this embodiment, the contact sampling circuit includes a first photocoupler OC1 and a second photocoupler OC 2.
The light emitting diode of the first photoelectric coupler OC1 and the light emitting diode of the second photoelectric coupler OC2 are respectively connected in parallel through a current limiting resistor, and after being connected in parallel, the light emitting diodes are connected in series with the contact of the gas density relay to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler OC1 and the second photoelectric coupler OC2 are opposite; the collector of the phototriode of the first photoelectric coupler OC1 and the collector of the phototriode of the second photoelectric coupler OC2 are both connected with the power supply through a divider resistor, the emitter of the phototriode of the first photoelectric coupler OC1 is connected with the emitter of the phototriode of the second photoelectric coupler OC2 to form an output end out6, and the output end out6 is connected with the intelligent control unit 7 and is grounded through a resistor R5.
By the contact sampling circuit, the contact P of the gas density relay 1 can be known convenientlyJWhether open or closed. Specifically, when the contact point P isJWhen the circuit is closed, the closed loop is electrified, the first photoelectric coupler OC1 is conducted, the second photoelectric coupler OC2 is cut off, and the emitter (i.e. the output end out6) of the phototriode of the first photoelectric coupler OC1 outputs high level; or, the first photo coupler OC1 is turned off, the second photo coupler OC2 is turned on, and the emitter (i.e., the output end out6) of the photo transistor of the second photo coupler OC2 outputs a high level. When the contact point P isJWhen the circuit is opened, the closed loop is powered off, the first photoelectric coupler OC1 and the second photoelectric coupler OC2 are both cut off, and the emitters (i.e., the output end out6) of the phototransistors of the first photoelectric coupler OC1 and the second photoelectric coupler OC2 output low level.
In a preferred embodiment, the contact sampling circuit further includes a first voltage regulator diode group and a second voltage regulator diode group, the first voltage regulator diode group and the second voltage regulator diode group are connected in parallel to the contact signal control loop, and the connection directions of the first voltage regulator diode group and the second voltage regulator diode group are opposite; the first voltage stabilizing diode group and the second voltage stabilizing diode group are respectively formed by connecting one, two or more than two voltage stabilizing diodes in series.
In this embodiment, the first zener diode group includes a first zener diode D1 and a second zener diode D2 connected in series, and a cathode of the first zener diode D1 is connected to an anode of the second zener diode D2; the second zener diode group comprises a third zener diode D3 and a fourth zener diode D4 which are connected in series, and the anode of the third zener diode D3 is connected with the cathode of the fourth zener diode D4.
The contact sampling circuit can conveniently realize the contact P of the gas density relay 1JMonitoring the state of the contact point P by combining with an intelligent control unit 7JWhether the power grid is in an open state or a closed state is correspondingly processed, remote transmission is implemented, the signal state of the contact is known from a background, and the reliability of the power grid is greatly improved.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1) and a power supply 72 (U2).
Example eight:
as shown in fig. 9, the present embodiment is different from the eighth embodiment in that: the intelligent control unit 7 mainly comprises a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), a data storage 76(U6), and the like.
The communication mode of the communication module 73(U3) may be wired, such as RS232, RS485, CAN-BUS, etc., industrial BUS, fiber ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cable, PLC power carrier, etc.; or wireless, such as 2G/3G/4G/5G, WIFI, Bluetooth, Lora, Lorawan, Zigbee, infrared, ultrasonic, sound wave, satellite, light wave, quantum communication, sonar, etc. The intelligent control unit protection circuit 74(U4) may be an anti-electrostatic interference circuit (e.g., ESD, EMI), an anti-surge circuit, an electric fast protection circuit, an anti-rf field interference circuit, an anti-pulse group interference circuit, a power supply short-circuit protection circuit, a power supply reverse protection circuit, an electrical contact mis-connection protection circuit, a charging protection circuit, etc. The intelligent control unit protection circuits can be one or formed by flexibly combining a plurality of types. The display and output 75(U5) may be a digital tube, LED, LCD, HMI, display, matrix screen, printer, fax, projector, mobile phone, etc., and may be one or a combination of several. The data storage 76(U6) may be FLASH memory cards such as FLASH, RAM, ROM, hard disk, SD, etc., magnetic tapes, punched tapes, compact discs, U disks, discs, films, etc., and may be one type or a combination of several types.
Example nine:
as shown in fig. 10, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit, in this embodiment, the contact sampling circuit includes a first hall current sensor H1 and a second hall current sensor H2, the first hall current sensor H1, the second hall current sensor H2 and a contact P of the gas density relayJAre connected in series to form a closed loop, and the contact point P of the gas density relay 1JConnected between the first hall current sensor H1 and the second hall current sensor H2; the output end of the first hall current sensor H1 and the output end of the second hall current sensor H2 are both connected with the intelligent control unit 7.
By the contact sampling circuit, the contact P of the gas density relay 1 can be known convenientlyJWhether open or closed. Specifically, when the contact point P isJWhen the Hall sensor is closed, a closed loop is electrified, and current flows between the first Hall current sensor H1 and the second Hall current sensor H2 to generate induced potential; when the contact point P isJWhen the Hall sensor is opened, the closed loop is powered off, no current flows between the first Hall current sensor H1 and the second Hall current sensor H2, and the induced potential is zero.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), and a data storage 76 (U6).
Example ten:
as shown in fig. 11, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit, and in this embodiment, the contact sampling circuit includes: a first silicon controlled SCR1, a second silicon controlled SCR2, a third silicon controlled SCR3, and a fourth silicon controlled SCR 4.
The first silicon controlled rectifier SCR1 and the third silicon controlled rectifier SCR3 are connected in series, and the second silicon controlled rectifier SCR2 and the fourth silicon controlled rectifier SCR4 are connected in series and then form a string with a series circuit formed by the first silicon controlled rectifier SCR1 and the third silicon controlled rectifier SCR3A parallel closed loop; contact point P of the gas density relay 1JOne end of the first and second connecting wire is electrically connected with a wire between the first and third silicon controlled SCRs 1 and 3, and the other end is electrically connected with a wire between the second and fourth silicon controlled SCRs 2 and 4. The series-parallel connection here is a circuit in which the above-described components are connected in parallel and in series, as shown in fig. 6.
Specifically, the anode of the first SCR1 and the cathode of the second SCR2 are connected to form the output end of the online check contact signal sampling unit 6, which is connected to the intelligent control unit 7; the cathode of the first silicon controlled rectifier SCR1 is connected with the cathode of the third silicon controlled rectifier SCR 3; the anode of the second SCR2 is connected with the anode of the fourth SCR 4; the anode of the third SCR3 and the cathode of the fourth SCR4 are connected to the input terminal of the online check contact signal sampling unit 6. The control electrodes of the first silicon controlled rectifier SCR1, the second silicon controlled rectifier SCR2, the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are all connected with the intelligent control unit 7. The intelligent control unit 7 can control on or off of the corresponding controllable silicon.
The working process of the embodiment is as follows:
when not verified and operating normally, the contact PJAnd when the circuit is disconnected, the contact sampling circuit triggers the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4, the third silicon controlled rectifier SCR3 and the fourth silicon controlled rectifier SCR4 are in a conducting state, and the contact signal control loop is in a working state. At the moment, the contact sampling circuit does not trigger the first silicon controlled rectifier SCR13 and the second silicon controlled rectifier SCR2, and the cathodes of the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 have no voltage output and are in a non-conduction state.
When verification is performed, the contact sampling circuit does not trigger the third SCR3 and the fourth SCR4, but triggers the first SCR1 and the second SCR 2. At this time, the third SCR3 and the fourth SCR4 are in an OFF state, and the contact PJIs isolated from the contact signal control circuit. The first SCR1 and the second SCR2 are in conduction state, and the contact PJAnd the online checking contact signal sampling unit 6 is communicated with the intelligent control unit 7And (6) connecting.
The online check contact signal sampling unit 6 can also be formed by mixing a solid-state relay or an electromagnetic relay and a silicon controlled rectifier flexibly.
In this embodiment, the intelligent control unit 7 mainly includes a processor 71(U1), a power supply 72(U2), a communication module 73(U3), an intelligent control unit protection circuit 74(U4), a display and output 75(U5), and a data storage 76 (U6).
Example eleven:
fig. 12 is a schematic view of an air path structure of an electrical system according to a preferred embodiment of the present invention. As shown in fig. 12, the electrical equipment 8 is a sulfur hexafluoride high voltage circuit breaker, comprising a gas chamber 802 arranged within the electrical equipment 8. The gas density relay 1 is installed in the inner accommodating space of the horizontal frame, one end of the connecting pipe is connected with the gas inlet of the valve 4, and the other end of the connecting pipe extends to the lower part of the gas chamber 802 along the horizontal frame and is communicated with the gas chamber 802 from the lower part. The air inlet of the valve 4 is connected with the air chamber 802 of the electrical equipment 8 in a sealing way through a connecting pipe; and the gas outlet of the valve 4 is communicated with the gas path of the gas density relay 1. The probe of the pressure sensor 2 is positioned on the gas path of the gas density relay 1; the temperature adjusting mechanism 5 is arranged on the gas density relay 1; the online check contact signal sampling unit 6 is respectively connected with the density relay 1 and the intelligent control unit 7; pressure sensor 2, temperature sensor 3, valve 4 temperature regulation mechanism 5 still is connected with intelligent control unit 7 respectively. The part of the pressure sensor 2 except the probe, the part of the temperature sensor 3 except the probe, the temperature adjusting mechanism 5, the online checking contact signal sampling unit 6 and the intelligent control unit 7 are all fixed on the mounting plate of the vertical frame.
The electrical system with online sampling and checking functions comprises: when the contact of the density relay is verified at the ambient temperature of high temperature, low temperature, normal temperature and 20 ℃, the error judgment requirements of the density relay can be different, and the density relay can be implemented according to the temperature requirements and related standards; the error performance of the gas density relay can be compared in different time periods at different temperatures according to the error performance of the gas density relay. I.e., comparisons over the same temperature range at different times, a determination is made as to the performance of the density relay. The comparison of each period with history and the comparison of the history and the present are carried out. The density relay can also be subjected to physical examination. When necessary, the contact signals of the gas density relay can be checked at any time; the density value of the monitored electric equipment is judged whether to be normal or not by the gas density relay. The density value of the electrical equipment, the gas density relay, the pressure sensor and the temperature sensor can be judged, analyzed and compared normally and abnormally, and further the states of the electrical equipment, such as gas density monitoring, the density relay and the like, can be judged, compared and analyzed; the contact signal state of the gas density relay is monitored, and the state is remotely transmitted. The contact signal state of the gas density relay can be known in the background: the system is opened or closed, so that one more layer of monitoring is provided, and the reliability is improved; the temperature compensation performance of the gas density relay can be detected, or detected and judged; the contact resistance of the contact point of the gas density relay can be detected or detected and judged; and the insulating property of the gas density relay is also detected, or detected and judged. In addition, for the SF6 gas, a specific conversion method of the pressure-temperature characteristic of the SF6 gas can be calculated according to the Betty-Bridgman equation; for the SF6 mixed gas, a specific conversion method of the pressure-temperature characteristic of the SF6 mixed gas can be calculated according to a Dalton partial pressure law, a Betty-Bridgman equation and an ideal gas state equation. The temperature regulating mechanism is arranged in the shell of the gas density relay or outside the shell and is arranged on the shell. The signal generator comprises but is not limited to a microswitch, a magnetic auxiliary electric contact, a reed switch and a miniature switch, and the gas density relay body outputs a contact signal through the signal generator; the pressure detector includes, but is not limited to, a bourdon tube, a bellows + spring, a pressure sensor; the temperature compensation element includes, but is not limited to, a temperature compensation sheet, a gas enclosed in the housing, and a temperature compensation sheet + a gas enclosed in the housing.
To sum up, the utility model provides a pair of electric system with online sampling check-up function comprises gas circuit (can be through the pipeline) coupling part, pressure regulation part, signal measurement control part etc. and the primary function is that the contact value of gas density relay under the ambient temperature (the pressure value when warning/shutting action) carries out online check-up and measure to the corresponding pressure value when automatic conversion becomes 20 ℃, the performance detection to the contact (warning and shutting) value of gas density relay is realized on line. The installation positions of the gas density relay, the pressure sensor, the temperature sensor, the pressure regulating mechanism, the valve, the online checking contact signal sampling unit and the intelligent control unit can be flexibly combined. For example: the gas density relay, the pressure sensor, the temperature sensor, the online check contact signal sampling unit and the intelligent control unit can be combined together, integrally designed and also can be designed in a split mode; can be arranged on the shell or on the multi-way joint, and can also be connected together through a connecting pipe. The valve can be directly connected with electrical equipment, or can be connected with the electrical equipment through a self-sealing valve or an air pipe. The pressure sensor, the temperature sensor, the online check contact signal sampling unit and the intelligent control unit can be combined together and are designed integrally; the pressure sensor and the temperature sensor can be combined together and are designed integrally; the online check joint signal sampling unit and the intelligent control unit can be combined together to realize integrated design. In short, the structure is not limited.
A gas density relay that involves among the electric system with online sampling check function can refer to its component element and design the gas density relay of an organic whole structure, also can refer to the gas density relay that its component element designed into components of a whole that can function independently structure, also can generally refer to gas density monitoring devices in addition.
The anti-rust and anti-vibration device is compact and reasonable in structural arrangement, good in anti-rust and anti-vibration capacity of each part, firm in installation and reliable in use. The connection, the dismouting of each pipeline of electric system are easily operated, and equipment and part are convenient to be maintained. The gas density relay calibration device can complete the calibration work of the gas density relay without a maintainer going to the site, greatly improves the reliability of a power grid, improves the efficiency and reduces the cost.
The above detailed description of the embodiments of the present invention is only for exemplary purposes, and the present invention is not limited to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims (54)

1. An electrical system having an online sampling verification function, comprising:
the electric equipment is internally provided with a gas chamber filled with insulating gas;
the gas density relay is arranged outside a gas chamber of the electrical equipment or is arranged outside the gas chamber of the electrical equipment through a valve;
the temperature adjusting mechanism is a temperature-adjustable adjusting mechanism and is configured to adjust the temperature rise and fall of a temperature compensation element of the gas density relay so as to enable the gas density relay to generate contact action;
the gas density detection sensor is communicated with the gas density relay;
the online check contact signal sampling unit is connected with the gas density relay and is configured to sample a contact signal generated when a contact of the gas density relay acts;
the intelligent control unit is respectively connected with the gas density detection sensor, the temperature adjusting mechanism and the online check contact signal sampling unit, and is configured to complete control of the temperature adjusting mechanism, pressure value acquisition, temperature value acquisition and/or gas density value acquisition, and detection of a contact signal action value and/or a contact signal return value of the gas density relay;
wherein the contact signal comprises an alarm, and/or a latch.
2. The electrical system with online sample verification function of claim 1, wherein: the electric system comprises a support, the air chamber of the electric equipment is positioned above or below the support, the support comprises a vertical frame and a horizontal frame, and the gas density relay is positioned in the inner accommodating space of the horizontal frame.
3. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor is arranged on the gas density relay; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is arranged inside or outside the gas density relay; alternatively, the first and second electrodes may be,
the gas density detection sensor, online check-up contact signal sampling unit with the intelligence is controlled the unit and is set up on the gas density relay.
4. The electrical system with online sample verification function of claim 3, wherein: the gas density relay and the gas density detection sensor are of an integrated structure; or the gas density relay and the gas density detection sensor are a remote transmission type gas density relay with an integrated structure.
5. The electrical system with online sample verification function of claim 1, wherein: the gas density relay comprises one or more of a bimetallic strip compensated gas density relay, a gas compensated gas density relay, a bimetallic strip and gas compensation mixed gas density relay, a completely mechanical gas density relay, a digital gas density relay, a mechanical and digital combined gas density relay, a gas density relay with a pointer display, a digital display gas density relay, a gas density switch without display or indication, an SF6 gas density relay, an SF6 mixed gas density relay and an N2 gas density relay.
6. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor is of an integrated structure; or, the gas density detection sensor is a gas density transmitter with an integrated structure.
7. The electrical system with online sample verification function of claim 6, wherein: the online checking contact signal sampling unit is arranged on the gas density transmitter.
8. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor; or, a gas density transmitter consisting of a pressure sensor and a temperature sensor is adopted; alternatively, a density detection sensor using quartz tuning fork technology.
9. The electrical system with online sample verification function of claim 8, wherein: the probe of the pressure sensor is arranged on the gas path of the gas density relay;
and the probe of the temperature sensor is arranged on or outside the gas path of the gas density relay, or in the gas density relay, or outside the gas density relay.
10. The electrical system with online sample verification function of claim 8, wherein: the pressure sensor includes a relative pressure sensor, and/or an absolute pressure sensor.
11. The electrical system with online sample verification function of claim 8, wherein: and the gas density relay compares the ambient temperature value with the temperature value acquired by the temperature sensor to complete the calibration of the temperature sensor.
12. The electrical system with online sample verification function of claim 1, wherein: the temperature adjusting mechanism is a heating element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heat preservation piece, a temperature controller, a temperature detector and a temperature adjusting mechanism shell; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power adjuster and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a refrigerating element, a power regulator and a temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a heating power regulator and a constant temperature controller; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism comprises a heating element, a controller and a temperature detector; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a heating element which is arranged near the temperature compensation element; alternatively, the first and second electrodes may be,
the temperature adjusting mechanism is a miniature thermostat;
the heating element comprises a silicon rubber heater, a resistance wire, an electric heating belt, an electric heating rod, a hot air blower, an infrared heating device and a semiconductor;
the temperature controller is connected with the heating element and used for controlling the heating temperature of the heating element, and the temperature controller comprises one of a PID controller, a controller formed by combining PID and fuzzy control, a variable frequency controller and a PLC controller.
13. The electrical system with online sample verification function of claim 1, wherein: and one end of the valve is provided with a connecting port communicated with the electrical equipment, and the other end of the valve is communicated with the gas path of the gas density relay.
14. The electrical system with online sample verification function of claim 1, wherein: the valve is also connected with the intelligent control unit, and the valve is closed or opened under the control of the intelligent control unit.
15. The electrical system with online sample verification function of claim 1, wherein: the valve is communicated with the electrical equipment through a connector.
16. The electrical system with online sample verification function of claim 1, wherein: the valve is an electric valve, or an electromagnetic valve, or a piezoelectric valve, or a temperature control valve, or a novel valve which is made of intelligent memory materials and is opened or closed by electric heating.
17. The electrical system with online sample verification function of claim 1, wherein: the valve is closed or opened in a hose bending or flattening mode.
18. The electrical system with online sample verification function of claim 1, wherein: the valve is sealed within a chamber or housing.
19. The electrical system with online sample verification function of claim 1, wherein: pressure sensors are respectively arranged on two sides of the gas path of the valve; alternatively, the first and second electrodes may be,
and pressure detectors are respectively arranged on two sides of the gas path of the valve.
20. The electrical system with online sample verification function of claim 1, wherein: the electrical system further comprises a self-sealing valve mounted between the electrical equipment and the valve; alternatively, the valve is mounted between the electrical device and the self-sealing valve.
21. The electrical system with online sample verification function of claim 1, wherein: further comprising: the gas path of the pressure regulating mechanism is communicated with the gas density relay; the pressure regulating mechanism is also connected with the intelligent control unit, the pressure of the gas density relay is regulated to rise and fall under the control of the intelligent control unit, and then the gas density relay is matched or/and combined with the temperature regulating mechanism to enable the gas density relay to generate contact action; alternatively, the first and second electrodes may be,
further comprising: the intelligent control unit is connected with the heating device; alternatively, the first and second electrodes may be,
still include air chamber and heating device, the air chamber with gas density relay is linked together, the outside or the inside of air chamber are equipped with the heating device, the intelligence control unit with the heating device is connected.
22. The electrical system with online sample verification function of claim 21, wherein: the valve and the pressure regulating mechanism are sealed in a cavity or a shell; alternatively, the first and second electrodes may be,
the pressure regulating mechanism is sealed in a cavity or a shell.
23. The electrical system with online sample verification function of claim 21, wherein: during verification, the pressure adjusting mechanism is a closed air chamber, a heating element and/or a refrigerating element are arranged outside or inside the closed air chamber, and the temperature of the gas in the closed air chamber is changed by heating the heating element and/or refrigerating through the refrigerating element, so that the pressure of the gas density relay is increased or decreased; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is a cavity with an opening at one end, and the other end of the cavity is communicated with the gas circuit of the gas density relay; a piston is arranged in the cavity, one end of the piston is connected with an adjusting rod, the outer end of the adjusting rod is connected with a driving part, the other end of the piston extends into the opening and is in sealing contact with the inner wall of the cavity, and the driving part drives the adjusting rod to further drive the piston to move in the cavity; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is a closed air chamber, a piston is arranged in the closed air chamber and is in sealed contact with the inner wall of the closed air chamber, a driving part is arranged outside the closed air chamber, and the driving part pushes the piston to move in the cavity through electromagnetic force; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is an air bag with one end connected with a driving part, the air bag generates volume change under the driving of the driving part, and the air bag is communicated with the gas density relay; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is a corrugated pipe, one end of the corrugated pipe is communicated with the gas density relay, and the other end of the corrugated pipe stretches under the driving of the driving part; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is a deflation valve, and the deflation valve is an electromagnetic valve or an electric valve or a deflation valve realized in an electric or gas mode; alternatively, the first and second electrodes may be,
the pressure regulating mechanism is a compressor; alternatively, the first and second electrodes may be,
the pressure adjusting mechanism is a pump, and the pump comprises one of a pressurizing pump, an electric air pump and an electromagnetic air pump;
wherein, the driving part comprises one of a magnetic force, a motor, a reciprocating mechanism, a Carnot cycle mechanism and a pneumatic element.
24. The electrical system with online sample verification function of claim 21, wherein: the gas density relay, the valve and the pressure regulating mechanism are connected together through a connecting pipe.
25. An electrical system with online sample verification as claimed in claim 24, wherein: the gas path of the pressure regulating mechanism is communicated with the gas path of the gas density relay through a first connecting pipe; the gas outlet of the valve is directly communicated with the gas circuit of the gas density relay through a second connecting pipe, or the gas outlet of the valve is connected with the gas circuit of the pressure regulating mechanism through a second connecting pipe, so that the valve is communicated with the gas circuit of the gas density relay.
26. The electrical system with online sample verification function of claim 1, wherein: the online check joint signal sampling unit and the intelligent control unit are arranged together.
27. An electrical system with online sample verification as claimed in claim 26, wherein: the online checking contact signal sampling unit and the intelligent control unit are sealed in a cavity or a shell.
28. The electrical system with online sample verification function of claim 1, wherein: the online check contact signal sampling unit is provided with at least two groups of independent sampling contacts, can automatically check at least two contacts simultaneously, and continuously measures without replacing the contacts or reselecting the contacts; wherein the content of the first and second substances,
the contact includes one of warning contact, warning contact + shutting 1 contact + shutting 2 contact, warning contact + shutting contact + superpressure contact.
29. The electrical system with online sample verification function of claim 1, wherein: the online checking contact signal sampling unit is used for testing that the voltage of the contact signal action value or the switching value of the contact signal action value of the gas density relay is not lower than 24V, namely, the voltage of not lower than 24V is applied between corresponding terminals of contact signals during checking.
30. The electrical system with online sample verification function of claim 1, wherein: the contact of the gas density relay is a normally-open density relay, the online checking contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact of the gas density relay and a contact signal control circuit, and the second connecting circuit is connected with the contact of the gas density relay and the intelligent control unit; in a non-verification state, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; in a checking state, the online checking contact signal sampling unit cuts off the first connecting circuit, is communicated with the second connecting circuit and connects the contact of the gas density relay with the intelligent control unit; alternatively, the first and second electrodes may be,
the contact of the gas density relay is a normally closed density relay, the online checking contact signal sampling unit comprises a first connecting circuit and a second connecting circuit, the first connecting circuit is connected with the contact of the gas density relay and a contact signal control circuit, and the second connecting circuit is connected with the contact of the gas density relay and the intelligent control unit; in a non-verification state, the second connecting circuit is disconnected or isolated, and the first connecting circuit is closed; under the check-up state, online check-up contact signal sampling unit is closed contact signal control circuit cuts off gas density relay's contact and contact signal control circuit's being connected, the intercommunication second connecting circuit, will gas density relay's contact with the intelligence is controlled the unit and is connected.
31. An electrical system with online sample verification as claimed in claim 30, wherein: the first connecting circuit comprises a first relay, the second connecting circuit comprises a second relay, the first relay is provided with at least one normally closed contact, the second relay is provided with at least one normally open contact, and the normally closed contact and the normally open contact are kept in opposite switch states; the normally closed contact is connected in series in the contact signal control loop, and the normally open contact is connected to the contact of the gas density relay;
in a non-checking state, the normally closed contact is closed, the normally open contact is opened, and the gas density relay monitors the output state of the contact in real time; under the check-up state, normally closed contact disconnection, normally open contact is closed, gas density relay's contact passes through normally open contact with the intelligence is controlled the unit and is connected.
32. An electrical system with online sample verification as claimed in claim 31, wherein: the first relay and the second relay are two independent relays or the same relay.
33. An electrical system with online sample verification as claimed in claim 30, wherein: the online checking contact signal sampling unit is provided with a contact sampling circuit, the contact sampling circuit comprises a photoelectric coupler and a resistor, and the photoelectric coupler comprises a light emitting diode and a photosensitive triode; the light emitting diode and the contact of the gas density relay are connected in series to form a closed loop; the emitting electrode of the phototriode is grounded; the collector of the phototriode is connected with the intelligent control unit and is also connected with a power supply through the resistor; when the contact is closed, the closed loop is electrified, the light-emitting diode emits light, the phototriode is conducted by the light, and the collector of the phototriode outputs a low level; when the contact is disconnected, a closed loop is disconnected, the light emitting diode does not emit light, the phototriode is cut off, and a collector of the phototriode outputs a high level; alternatively, the first and second electrodes may be,
the contact sampling circuit comprises a first photoelectric coupler and a second photoelectric coupler; the light emitting diode of the first photoelectric coupler and the light emitting diode of the second photoelectric coupler are respectively connected in parallel or directly connected in parallel through a current limiting resistor, and are connected in series with the contact of the gas density relay after being connected in parallel to form a closed loop, and the connection directions of the light emitting diodes of the first photoelectric coupler and the second photoelectric coupler are opposite; the collector of the phototriode of the first photoelectric coupler and the collector of the phototriode of the second photoelectric coupler are connected with a power supply through a divider resistor, the emitter of the phototriode of the first photoelectric coupler is connected with the emitter of the phototriode of the second photoelectric coupler to form an output end, and the output end is connected with the intelligent control unit and is grounded through a resistor; when the contact is closed, a closed loop is electrified, the first photoelectric coupler is conducted, the second photoelectric coupler is cut off, and the emitter of the phototriode of the first photoelectric coupler outputs high level; or the first photoelectric coupler is cut off, the second photoelectric coupler is conducted, and an emitter of a phototriode of the second photoelectric coupler outputs a high level; when the contact is opened, the closed loop is powered off, the first photoelectric coupler and the second photoelectric coupler are both cut off, and the emitters of the phototriodes of the first photoelectric coupler and the second photoelectric coupler output low levels; alternatively, the first and second electrodes may be,
the contact sampling circuit comprises a first Hall current sensor and a second Hall current sensor, contacts of the first Hall current sensor, the second Hall current sensor and the gas density relay are connected in series to form a closed loop, and the contact of the gas density relay is connected between the first Hall current sensor and the second Hall current sensor; the output end of the first Hall current sensor and the output end of the second Hall current sensor are both connected with the intelligent control unit; when the contact is closed, a closed loop is electrified, and current flows between the first Hall current sensor and the second Hall current sensor to generate induced potential; when the contact is opened, the closed loop is powered off, no current flows between the first Hall current sensor and the second Hall current sensor, and the generated induced potential is zero; alternatively, the first and second electrodes may be,
the contact sampling circuit comprises a first silicon controlled rectifier, a second silicon controlled rectifier, a third silicon controlled rectifier and a fourth silicon controlled rectifier; first silicon controlled rectifier, third silicon controlled rectifier establish ties, and the series connection circuit that second silicon controlled rectifier, fourth silicon controlled rectifier establish ties the back and first silicon controlled rectifier, third silicon controlled rectifier constitute forms the series-parallel closed circuit, the one end of gas density relay's contact pass through the circuit with circuit electricity between first silicon controlled rectifier, the third silicon controlled rectifier is connected, the other end pass through the circuit with circuit electricity between second silicon controlled rectifier, the fourth silicon controlled rectifier is connected.
34. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit acquires the gas density value acquired by the gas density detection sensor; or, the intelligence accuse unit acquires the pressure value and the temperature value that gas density detection sensor gathered accomplish the on-line monitoring of gas density relay to the electrical equipment who monitors.
35. The electrical system with online sampling verification function as claimed in claim 1 or 34, wherein the intelligent control unit calculates the gas density value by using an averaging method, the averaging method is as follows: setting acquisition frequency in a set time interval, and carrying out average value calculation processing on N gas density values of different acquired time points to obtain the gas density values; alternatively, the first and second electrodes may be,
setting temperature interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different temperature values acquired in all temperature ranges to obtain gas density values; alternatively, the first and second electrodes may be,
setting a pressure interval step length in a set time interval, and carrying out average value calculation processing on density values corresponding to N different pressure values acquired in the whole pressure variation range to obtain a gas density value;
wherein N is a positive integer greater than or equal to 1.
36. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit acquires a gas density value acquired by the gas density detection sensor when the gas density relay generates contact signal action or switching, and completes online verification of the gas density relay; alternatively, the first and second electrodes may be,
the intelligence accuse unit acquires gas density relay takes place contact signal action or when switching the pressure value and the temperature value that gas density detection sensor gathered to according to the pressure value that gas pressure-temperature characteristic conversion becomes corresponding 20 ℃, gas density value promptly, accomplish gas density relay's online check-up.
37. The electrical system with online sample verification function of claim 1, wherein: the gas density relay is provided with a comparison density value output signal which is connected with the intelligent control unit; alternatively, the first and second electrodes may be,
the gas density relay is provided with a comparison pressure value output signal, and the comparison pressure value output signal is connected with the intelligent control unit.
38. An electrical system with online sample verification as claimed in claim 37, wherein: when the gas density relay outputs a comparison density value output signal, the intelligent control unit acquires the current gas density value, compares the gas density value and the comparison density value to complete comparison density value verification of the gas density relay, judges the result through intelligent control unit or background comparison, and sends an abnormal prompt if the error is out of tolerance; alternatively, the first and second electrodes may be,
when the gas density relay outputs a comparison density value output signal, the intelligent control unit acquires the current gas density value, compares the gas density value with the current gas density value to complete the mutual verification of the gas density relay and the gas density detection sensor, judges the result by the intelligent control unit or background comparison, and sends an abnormal prompt if the error is out of tolerance; alternatively, the first and second electrodes may be,
when gas density relay output compares pressure value output signal, intelligence accuse unit gathers pressure value at that time, compares, accomplishes the mutual check-up to gas density relay and gas density detection sensor, and intelligence accuse unit or backstage contrast are judged the result, if the error is out of tolerance, send unusual suggestion.
39. The electrical system with online sample verification function of claim 1, wherein: the electrical system comprises at least two gas density detection sensors, each gas density detection sensor comprises a pressure sensor and a temperature sensor; and comparing the gas density values detected by the gas density detection sensors to finish the mutual verification of the gas density detection sensors.
40. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor comprises at least two pressure sensors, and pressure values acquired by the pressure sensors are compared to complete mutual verification of the pressure sensors.
41. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor comprises at least two temperature sensors, and the temperature values acquired by the temperature sensors are compared to complete mutual verification of the temperature sensors.
42. The electrical system with online sample verification function of claim 1, wherein: the gas density detection sensor comprises at least one pressure sensor and at least one temperature sensor;
randomly arranging and combining the pressure values acquired by the pressure sensors and the temperature values acquired by the temperature sensors, converting the combinations into a plurality of corresponding pressure values at 20 ℃ according to gas pressure-temperature characteristics, namely gas density values, and comparing the gas density values to finish the mutual verification of the pressure sensors and the temperature sensors; alternatively, the first and second electrodes may be,
the pressure values collected by the pressure sensors and the temperature values collected by the temperature sensors are subjected to all permutation and combination, and each combination is converted into a plurality of corresponding pressure values at 20 ℃ according to gas pressure-temperature characteristics, namely gas density values, and each gas density value is compared to complete the mutual calibration of each pressure sensor and each temperature sensor; alternatively, the first and second electrodes may be,
and comparing the plurality of gas density values obtained by the pressure sensors and the temperature sensors with output signals of the comparison density value output by the gas density relay to finish the mutual verification of the gas density relay, the pressure sensors and the temperature sensors.
43. The electrical system with online sample verification function of claim 1, wherein: after the gas density relay is verified, the electric system automatically generates a verification report of the gas density relay, and if the gas density relay is abnormal, an alarm is given out and uploaded to a remote end or sent to a designated receiver.
44. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit automatically controls the whole verification process based on an embedded algorithm and a control program of an embedded system of the microprocessor, and comprises all peripherals, logic, input and output.
45. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit is provided with an electrical interface, the electrical interface completes test data storage, and/or test data export, and/or test data printing, and/or data communication with an upper computer, and/or analog quantity and digital quantity information input.
46. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit further comprises a communication module for realizing remote transmission of test data and/or verification results, and the communication mode of the communication module is a wired communication mode or a wireless communication mode.
47. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit is also provided with a clock, and the clock is configured to be used for regularly setting the verification time of the gas density relay, or recording the test time, or recording the event time.
48. The electrical system with online sample verification function of claim 1, wherein: the intelligent control unit is controlled through field control and/or background control.
49. The electrical system with online sample verification function of claim 21, wherein: the electrical system also comprises a multi-way joint, and the gas density relay, the valve and the pressure regulating mechanism are arranged on the multi-way joint; or the intelligent control unit is arranged on the multi-way connector.
50. An electrical system with online sample verification functionality according to claim 49, wherein: the gas path of the gas density relay is connected with the first interface of the multi-way connector; the gas path of the pressure regulating mechanism is connected with a second interface of the multi-way connector, and the first interface is communicated with the second interface so as to communicate the gas path of the pressure regulating mechanism with the gas path of the gas density relay; and the gas outlet of the valve is communicated with a third interface of the multi-way joint, and the third interface is communicated with the first interface, so that the gas outlet of the valve is communicated with the gas circuit of the pressure regulating mechanism and/or the gas circuit of the gas density relay.
51. An electrical system with online sample verification functionality according to claim 50, wherein: and a connecting part butted with the electrical equipment is arranged at the third interface of the multi-way connector, and the valve is embedded in the connecting part.
52. The electrical system with online sample verification function of claim 1, wherein: the electrical system also comprises a display interface for man-machine interaction, which is connected with the intelligent control unit and displays the current verification data in real time and/or supports data input.
53. The electrical system with online sample verification function of claim 1, wherein: the electrical system further comprises: the micro water sensor is connected with the intelligent control unit and/or the decomposition substance sensor is connected with the intelligent control unit and the gas density relay respectively.
54. The electrical system with online sample verification function of claim 1, wherein: the online calibration method comprises the following steps that at least two gas density relays, at least two multi-way joints, at least two temperature adjusting mechanisms, at least two online calibration contact signal sampling units, an intelligent control unit and a gas density detection sensor are used for completing online calibration of the gas density relays; alternatively, the first and second electrodes may be,
the online calibration method comprises the following steps that at least two gas density relays, at least two multi-way joints, at least two temperature adjusting mechanisms, at least two online calibration contact signal sampling units, at least two intelligent control units and a gas density detection sensor are used for completing online calibration of the gas density relays; alternatively, the first and second electrodes may be,
at least two gas density relays, at least two multi-way joints, at least two temperature adjusting mechanisms, at least two online checking contact signal sampling units, at least two gas density detection sensors and an intelligent control unit are used for completing the online checking of the gas density relays.
CN201921457422.6U 2019-09-04 2019-09-04 Electrical system with online sampling and checking functions Active CN210720654U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110535058A (en) * 2019-09-04 2019-12-03 上海乐研电气有限公司 Electrical system and its method of calibration with on-line sampling verifying function
CN113097915A (en) * 2021-04-06 2021-07-09 国网新疆电力有限公司检修公司 GIS circuit breaker monitoring assembly and monitoring alarm system
CN110535058B (en) * 2019-09-04 2024-05-03 上海乐研电气有限公司 Electrical system with online sampling and checking function and checking method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110535058A (en) * 2019-09-04 2019-12-03 上海乐研电气有限公司 Electrical system and its method of calibration with on-line sampling verifying function
WO2021043038A1 (en) * 2019-09-04 2021-03-11 上海乐研电气有限公司 Electrical system with on-line sampling verification function and verification method thereof
CN110535058B (en) * 2019-09-04 2024-05-03 上海乐研电气有限公司 Electrical system with online sampling and checking function and checking method thereof
CN113097915A (en) * 2021-04-06 2021-07-09 国网新疆电力有限公司检修公司 GIS circuit breaker monitoring assembly and monitoring alarm system

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