CN211528621U - Overvoltage-resistant remote transmission gas density relay - Google Patents
Overvoltage-resistant remote transmission gas density relay Download PDFInfo
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- CN211528621U CN211528621U CN201921458721.1U CN201921458721U CN211528621U CN 211528621 U CN211528621 U CN 211528621U CN 201921458721 U CN201921458721 U CN 201921458721U CN 211528621 U CN211528621 U CN 211528621U
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Abstract
The utility model relates to a gas density relay. An overvoltage-resistant remote transmission gas density relay comprises a shell, a pressure sensor fixing seat, a temperature sensor, a mechanical part and an electronic part; the mechanical part includes: the device comprises a pressure detector, a temperature compensation element, a signal generator and a signal adjusting mechanism; the electronic part includes: the intelligent processor, the communication module and the power supply; the pressure sensor is communicated with the pressure detector; what is needed isThe intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module, collects the signals, and processes the signals according to the gas pressure-temperature characteristic to obtain a corresponding density value P20And then the density value P can be remotely transmitted through the communication module20Pressure value and temperature value; the gas density value of the electrical equipment is monitored on line; the pressure sensor is fixed on the pressure sensor fixing seat in a sealing mode through a plurality of insulating parts. Therefore, the anti-interference capability of the density relay is greatly improved through the optimized design.
Description
Technical Field
The utility model relates to an electric power tech field, concretely relates to use on high pressure or middling pressure electrical equipment, high performance's teletransmission gas density relay and the monitoring system who constitutes thereof. In particular to a remote transmission gas density relay with strong overvoltage resistance.
Background
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. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and SF (sulfur hexafluoride) is6Electrical equipment is used more and more. SF6The gas has functions of arc extinction and insulation in high-voltage electrical equipment, and SF in the high-voltage electrical equipment6The density reduction of the gas will seriously affect the SF6Safe operation of high-voltage electrical equipment: SF6The reduction of the gas density to a certain extent will result in a loss of insulation and arc extinguishing properties.
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 Chinese smart grid and the ubiquitous power internet of things, the intelligent high-voltage electrical equipment is used as an important component and a key contact of the intelligent substation, and plays a significant role in improving the safety of the smart grid. At present, most of high-voltage electrical equipment is SF6 gas insulation equipment, and if the gas density is reduced (caused by leakage and the like), the electrical performance of the equipment is seriously influenced, and serious hidden danger is caused to safe operation. Currently, online monitoring of gas density values in SF6 high-voltage electrical equipmentIt is very common, especially, national grids propose to build ubiquitous power internet of things, and therefore, the application of a gas density monitoring system (gas density relay) is developed vigorously. Whereas current gas density monitoring systems (gas density relays) are basically: 1) using remote transmission of SF6The gas density relay realizes the collection and uploading of density, pressure and temperature, and realizes the online monitoring of gas density. 2) The gas density transmitter is used for realizing the acquisition and uploading of density, pressure and temperature and realizing the online monitoring of the gas density. SF6The gas density relay is the core and key component. Currently on-line monitoring of SF6SF in high voltage electrical equipment6Gas density values have become very common, for which purpose remote SF is used6The gas density relay realizes the collection of density, pressure and temperature. Apparently remote transmission type SF6The gas density relay is the core and key component. However, due to the severe environment of the field operation of the high-voltage substation, especially during the system operation, high overvoltage can be generated, which causes direct damage to the sensor or the electronic component, and further causes the remote transmission type SF6The remote transmission part of the gas density relay cannot work. And electromagnetic interference in the field is very strong, which also results in a remote transmission SF6The remote transmission part of the gas density relay cannot work reliably. In summary, the teletransmission SF is currently used6The gas density relay has the following defects: 1) are easy to damage; 2) abnormal signal transmission often occurs. The existing product is difficult to be suitable for outdoor severe environment work and meet the construction requirement of the ubiquitous power Internet of things, so that a high-performance remote transmission density relay is developed, and the ubiquitous power Internet of things construction is facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned defect of prior art, provide a high-performance teletransmission gas density relay, method and system for high-voltage electrical equipment. The utility model is used for solve and carry out accurate monitoring to the electrical equipment gas density of gas insulation or arc extinguishing, improve work efficiency, reduce the operation maintenance cost, guarantee electric wire netting safe operation.
The utility model is realized in this way: an overvoltage-resistant remote transmission gas density relay comprises a shell, a pressure sensor fixing seat, a temperature sensor, a mechanical part and an electronic part; the mechanical part includes: the pressure detector, the temperature compensation element, a plurality of signal generators for sending contact signals and a signal adjusting mechanism; the electronic part includes: the intelligent processor, the communication module and the power supply; the pressure sensor is communicated with the pressure detector on the gas path; the intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module; the intelligent processor acquires pressure signals through the pressure sensor, acquires temperature signals through the temperature sensor, and obtains corresponding density value P through processing of the intelligent processor according to the gas pressure-temperature ou characteristic20And remotely transmitting the density value P through the communication module20One or more of a pressure value and a temperature value, and further realize these numerical values of on-line monitoring electrical equipment, pressure sensor seals through a plurality of insulating parts and fixes on the pressure sensor fixing base, and the shell of pressure sensor and pressure sensor fixing base are mutual insulating.
The overvoltage-resistant remote gas density relay further comprises an electric field shielding piece, and the electric field shielding piece is arranged on the outer surface of the pressure sensor and/or the electronic part.
The overvoltage-resistant remote gas density relay further comprises a magnetic field shielding piece, and the magnetic field shielding piece is arranged on the outer surface of the pressure sensor and/or the electronic part.
The overvoltage-resistant remote gas density relay comprises a shell body of a mechanical part and a shell body of an electronic part, wherein the shell body of the mechanical part and the shell body of the electronic part are independent or separated from each other.
The temperature sensor is arranged at a position close to the temperature compensation element.
The overvoltage-resistant remote transmission gas density relay also comprises a heat insulation piece, wherein the heat insulation piece is arranged between the shell of the mechanical part and the shell of the electronic part; or at the power supply.
The overvoltage-resistant remote transmission gas density relay is characterized in that shockproof liquid is filled in a shell of the mechanical part, an outgoing line sealing piece is arranged, and a connecting line of the temperature sensor is connected with the intelligent processor through the outgoing line sealing piece.
The power supply is located away from the temperature sensor and the temperature compensation element.
The overvoltage-resistant remote gas density relay further comprises an equipment connecting joint, and the equipment connecting joint is arranged on the mechanical part or the electronic part.
The communication module is arranged at the shell of the electronic part or the shell of the mechanical part or is integrally designed with the intelligent processor; the pressure sensor is arranged in the electronic part shell or the mechanical part shell.
According to the overvoltage-resistant remote transmission gas density relay, the intelligent processor automatically controls the whole monitoring process based on an embedded algorithm and a control program of an embedded system of a microprocessor, and comprises all peripherals, logic and input and output.
The overvoltage-resistant remote transmission gas density relay also comprises a machine core, a pointer and a dial, and is provided with indication value display; or also a digital or liquid crystal display device with a display.
The electronic part of the overvoltage-resistant remote transmission gas density relay also comprises an electromagnetic shielding part.
In the high-performance remote transmission gas density relay, the electromagnetic shielding part is arranged inside or outside the shell of the electronic part.
The overvoltage-resistant remote transmission gas density relay is characterized in that the pressure sensor is provided with a shielding piece.
The overvoltage-resistant remote transmission gas density relay is characterized in that the intelligent processor and/or the communication module are/is provided with a shielding piece.
The intelligent processor measures the density relay of relative pressure or absolute pressure type.
The overvoltage-resistant remote transmission gas density relay is provided with a man-machine interaction functional module: the data display interface is included, and the current data value can be refreshed in real time; and a data input area for inputting parameter setting values;
according to the overvoltage-resistant remote transmission gas density relay, the intelligent processor is provided with an interface and completes 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 electric interface of the density relay is an interface for preventing misconnection protection and anti-electromagnetic interference junction.
The intelligent processor further comprises a communication module, remote information transmission is achieved through the communication module, and the communication module is arranged on the electronic shell or the mechanical shell.
The overvoltage-resistant remote transmission gas density relay further comprises a multi-way joint and a self-sealing valve, wherein the electronic part and the self-sealing valve are arranged on the multi-way joint.
The pressure detector and the pressure sensor are connected together through the connecting pipe.
The electronic part is arranged behind the shell of the mechanical part or on the shell or on the equipment connecting joint.
The intelligent processor of the overvoltage-resistant remote transmission gas density relay is provided with a timer.
The intelligent processor is controlled through field control or background control, or mutual interaction between the field and the background.
The overvoltage-resistant remote transmission gas density relay also comprises a micro-water sensor for monitoring the micro-water value of gas on line.
The overvoltage-resistant remote gas density relay also comprises a decomposer sensor for monitoring gas decomposers on line.
The overvoltage-resistant remote transmission gas density relay is provided with a self-diagnosis module for informing the abnormity including but not limited to disconnection, short circuit alarm and sensor damage.
The overvoltage-resistant remote transmission gas density relay provides an abnormal notice when the gas pressure tends to rise.
The overvoltage-resistant remote gas density relay also comprises an analysis system which is used for detecting and analyzing gas density monitoring, gas density relay performance and monitoring elements, judging and determining whether the abnormality occurs in an electrical part or a mechanical part.
In the overvoltage-resistant remote transmission gas density relay, the pressure detector is a bourdon tube or a corrugated tube; the temperature compensation element is a bimetallic strip or a sealed air chamber sealed with compensation gas; the signal generators are microswitches or magnetic auxiliary electric contacts.
The overvoltage-resistant remote transmission gas density relay also comprises a plurality of insulating pieces, and the insulation of the pressure sensor from the electronic part shell, the mechanical part shell and the equipment connecting joint is realized through the insulating pieces; or the housing of the pressure sensor and the housing of the remote gas density relay are insulated.
The overvoltage-resistant remote gas density relay can judge a gas supplementing event when the gas density value P20 is gradually and obviously increased within a certain short time, judge that the gas supplementing event is ended according to the maximum gas density value P20 monitored at that time, and calculate the gas density value P20 again.
The overvoltage-resistant remote transmission gas density relayAn electric appliance for monitoring the density P of gas in a certain short time20Gradually and slightly decreasing, the gas emission test event can be judged to be ended according to the minimum gas density value P20 monitored at the time, and the gas density value P is carried out again20And (4) calculating.
The high-performance remote gas density relay can record events such as air supply or/and air release tests and the like, such as time or/and times or/and gas quality.
A gas density monitoring system comprising said overvoltage resistant remote gas density relay, comprising: the overvoltage-resistant remote gas density relays are connected with a remote background detection system sequentially through the concentrator and the protocol converter; the overvoltage-resistant remote transmission gas density relays are respectively arranged on the electrical equipment of the corresponding gas chambers.
The gas density monitoring system composed of the overvoltage-resistant remote gas density relay comprises protocol converters including but not limited to IEC61850 protocol converter and IEC104 protocol converter.
The hub adopts an RS485 hub, and the IEC61850 protocol converter or the IEC104 protocol converter is also respectively connected with a network service printer and a network data router.
The utility model provides a high performance's teletransmission gas density relay and system that high-voltage electrical equipment used, pressure sensor pass through a plurality of insulating part sealed fixes on the pressure sensor fixing base, is insulating between pressure sensor's shell and the pressure sensor fixing base, can improve anti overvoltage, anti-electromagnetic interference ability so greatly. In addition, a shield is added, which can shield the electric field or the magnetic field by utilizing the reflection and/or absorption of the shield material to reduce the EMI radiation. The effective addition of the shielding material can reduce or eliminate unnecessary gaps, inhibit electromagnetic coupling radiation, and reduce electromagnetic leakage and interference. Materials with high electric and magnetic conductivity can be used as electromagnetic shielding materials (such as iron), and the shielding performance is generally required to be 40-60 dB. In particular, the electronic part is sealed in a housing with shielding material. The good sealing can well overcome the interference problem caused by electromagnetic leakage due to the discontinuous conductivity of the gap.
The electrical equipment comprises SF6Gas electric apparatus, SF6Mixed gas electrical equipment, environmental protection gas electrical equipment, or other insulating gas electrical equipment. The electrical equipment comprises GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas-filled cabinets, ring main units and the like. The gas density relay 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; the gas density relay with pointer display, the digital display type gas density relay and the gas density switch without display or indication; SF6Gas density relay, SF6Mixed gas density relay, N2Gas density relays, other gas density relays, and the like.
Drawings
Fig. 1 is a schematic side view of an embodiment of the present invention;
fig. 2 is a schematic front view of an embodiment of the present invention;
fig. 3 is a schematic circuit diagram according to a first embodiment of the present invention.
Fig. 4 is a schematic diagram of a system architecture according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a system architecture according to a third embodiment of the present invention.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 and fig. 2 are that high-voltage electrical equipment uses, the utility model discloses the structure schematic diagram, as shown in fig. 1 and fig. 2, the embodiment of the utility model provides a high-voltage electrical equipment that provides uses, high performance teletransmission gas density relay mainly comprises mechanical part 1 and the electronic part 2 relatively independent with mechanical part. Which comprises the following steps: the communication module 4, the pressure sensor 201 and the pressure sensor fixing seat 209; the machine part 1 comprises: a machine part housing 101, and a base 102, a pressure detector 103, a temperature compensation element 104, a movement 105, a pointer 106, a dial 1012, an end seat 108, a signal adjustment mechanism 107, a plurality of signal generators 109, a device connection joint 1010, and a temperature sensor 3, which are provided in the machine part housing. The electronic part 2 comprises an electronic part housing 2010, and an intelligent processor 202 and a power supply (power supply module) 203 which are arranged in the electronic part 2 housing. The pressure sensor 201 is fixed on the pressure sensor fixing seat 209, and the pressure sensor 201 is communicated with the pressure detector 103 on an air path. The mechanical part shell 101 and the electronic part shell 2010 are independent or separated from each other, and the intelligent processor 202 is connected with the temperature sensor 3, the pressure sensor 201 and the communication module 4 respectively. The pressure sensor 201 is hermetically fixed on a sensor housing 207 through insulating members 204, 205, 206, and then is fixed on a pressure sensor fixing seat 209 through the housing 207. The shielding piece 208 is arranged in the sensor shell 207, so that the interference resistance of the remote transmission density relay is improved. Meanwhile, a shielding part 2011 is arranged on the inner side (or the outer side) of the shell 2010, so that the anti-interference capability of the remote transmission density relay is further improved. Because the pressure sensor 201 is hermetically fixed on the pressure sensor fixing seat 209 through the plurality of insulating members 204, 205, 206, and the solid insulating members 204, 205, 206 are added between the housing 207 of the pressure sensor and the pressure sensor fixing seat 209, the pressure sensor 201 can bear high system overvoltage or lightning overvoltage, and the pressure sensor is not damaged. It is very important that the insulating member 205 is a sealing member with good sealing performance, and can ensure that the pressure sensor 201 is fixed on the pressure sensor fixing seat 209 in a sealing manner, so as to form a good sealing air path. Meanwhile, a shielding member 208 is disposed inside the sensor housing 207, and the reflection and/or absorption of the shielding member 208 is utilized to reduce EMI electromagnetic radiation, and suppress electromagnetic coupling radiation, and reduce electromagnetic leakage and interference. The shielding member 208 may be made of a material with high conductivity and magnetic permeability as an electromagnetic shielding material, and generally requires a shielding performance of 40-60 dB. In particular, the sensor 201 and the remote transmission electronic part 2 are sealed in a casing made of shielding material. The high-frequency-range-transmission-density relay has good sealing, well solves the problem of interference caused by electromagnetic leakage due to the discontinuous conductivity of gaps, and further improves the anti-interference level of the high-frequency-range-transmission-density relay. In addition, one end of the pressure detector 103 and one end of the temperature compensation element 104 are both fixed to the end base 108, the other end of the pressure detector 103 is hermetically connected to the base 102, the other end of the temperature compensation element 104 is connected to the movement 105 through a display link or the other end of the temperature compensation element 104 is directly connected to the movement 105, and the pointer 106 is mounted on the movement 105 and is provided in front of the dial 1012. The signal generator 109 can adopt a microswitch or a magnetic auxiliary electric contact, and the contact signal of the density relay is output through the signal generator 109. The pressure detector 103 may employ a bourdon tube or a bellows tube. The temperature compensation element 104 may employ a compensation plate or a gas enclosed within a housing. The utility model discloses a gas density relay can also include: an oil-filled type density relay, an oil-free type density relay, a gas density meter, a gas density switch, or a gas pressure gauge. In the remote gas density relay according to the first embodiment of the present invention, the pressure and temperature changes are corrected based on the pressure detector 103 and the temperature compensating element 104 to reflect the change of the gas density (sulfur hexafluoride). Under the pressure of the measured medium (sulfur hexafluoride) gas, due to the action of the temperature compensation element 104, when the density value of the (sulfur hexafluoride) gas changes, the pressure value of the (sulfur hexafluoride) gas also changes correspondingly, so that the tail end of the pressure detector 103 is forced to generate corresponding elastic deformation displacement, the elastic deformation displacement is transmitted to the movement 105 by means of the temperature compensation element 104, the movement 105 is transmitted to the pointer 106, and the density value of the measured sulfur hexafluoride gas is indicated on the dial 1012. The signal generator 109 serves as an output alarm latch contact signal. Thus, the gas density relay can display the density value of the (sulfur hexafluoride) gas. If the density value of sulfur hexafluoride gas is reduced, the pressure detector 103 generates corresponding reverse displacement, the reverse displacement is transmitted to the movement 105 through the temperature compensation element 104, the movement 105 is transmitted to the pointer 106, the pointer 106 moves towards the direction with small indicating value, the gas leakage degree is specifically displayed on the dial 1012, the signal generator 109 outputs (alarm locking) contact signals, and the density of sulfur hexafluoride gas in equipment such as an electrical switch and the like is monitored and controlled through a mechanical principle, so that the electrical equipment can work safely.
Fig. 3 is a schematic circuit diagram of a high-performance remote gas density relay for high-voltage electrical equipment, as shown in fig. 3, an intelligent processor 202 (which may be a general-purpose computer, an industrial personal computer, a CPU, a single chip microcomputer, an ARM chip, an AI chip, a quantum chip, a photonic chip, an MCU, an FPGA, a PLC, an industrial control motherboard, an embedded main control board, etc.), and a power supply 203: switching power supply, alternating current 220V, direct current power supply, LDO, programmable power supply, solar energy, storage battery, rechargeable battery, battery and the like. The intelligent processor 202 collects pressure signals P through the pressure sensor 201, collects temperature signals T through the temperature sensor 3 and utilizes SF6The mathematical model of the relationship between gas pressure and temperature is processed by the intelligent processor 202 using a soft measurement method to obtain a corresponding density value P20(i.e.a pressure value P of 20 ℃ C.)20) And can remotely transmit the density value P through the communication module 420Or value of density P20And the pressure value P and the temperature value T or the pressure value P and the temperature value T are adopted, so that the gas density value P of the electrical equipment is monitored on line20Or value of density P20Pressure value P and temperature value T, or pressure value P and temperature value T. Such as a remote transmission density relayThe device is accessed into the comprehensive automatic online monitoring system of the transformer substation through data communication modes such as RS-485 and the like, and is remotely transmitted to the central monitoring station of the unattended station, and real-time monitoring is carried out at the local and remote central monitoring stations of the transformer substation, so that SF is realized6SF in electrical equipment6On-line monitoring of gas density.
The technical product of the utility model is that the temperature sensor 3 and the temperature compensation element 104 are arranged together; or the temperature sensor 3 is arranged directly on the temperature compensation element 104; or the temperature sensor 3 is arranged near the temperature compensation element 104. Through the new design treatment, the performance is greatly improved.
The remote gas density relay further comprises a thermal insulation piece 5, wherein the thermal insulation piece 5 is arranged between the mechanical part shell 101 and the electronic part shell 2010; or the thermal insulation is provided at the power source (power module). The power supply (power supply module) 203 is located away from the temperature sensor 3 and the temperature compensation element 104.
The electronic part of the density relay further includes a shield 2011, and the shield 2011 can shield the electric field, or the magnetic field, or the electric field and the magnetic field. The shield 2011 is disposed inside or outside the electronics housing. The pressure sensor is provided with a shield 208. The intelligent processor or the communication module is provided with a shielding piece; or the intelligent processor and the communication module are both provided with shielding pieces. The remote transmission gas density relay further comprises insulators 204, 205 and 206, and the pressure sensor is connected with a pressure sensor shell 207 and a sensor fixing seat 209 through the insulators 204, 205 and 206; or the pressure sensor is hermetically fixed on a pressure sensor fixing seat 209 through a plurality of insulating pieces 204, 205 and 206.
The remote transmission gas density relay also comprises a plurality of insulating pieces, and the pressure sensor is insulated from the electronic part shell, the mechanical part shell and the equipment connecting joint through the plurality of insulating pieces; or the housing of the pressure sensor and the housing of the remote gas density relay are insulated. Through the innovative design and treatment, the performance of the device is greatly improved. Through specific comparison and test, as can be seen from table 1, the precision and the anti-interference capability of the remote transmission density relay adopting the technology have better performance than those of the remote transmission density relay in the prior art, have prominent substantive characteristics and remarkable progress, can greatly improve the precision and the anti-interference capability of the remote transmission density relay, and ensure the reliable and safe operation of a power grid.
As can be seen from Table 1, the precision, the anti-interference capability and the stability of the density relay adopting the invention are very good, the requirement of high precision is met, and the environmental adaptability of the density relay can be improved. Meanwhile, the key points are that the intelligent power grid has strong anti-interference capability and good stability, and the reliability and the accuracy of the intelligent power grid are greatly improved.
TABLE 1. the utility model discloses and prior art contact performance contrast table
In addition, the mechanical part shell of the remote transmission density relay is filled with shockproof liquid, an outgoing line sealing piece is further arranged in the mechanical part shell, and a connecting line of the temperature sensor 3 is connected with the intelligent processor through the outgoing line sealing piece. The gas density relay further comprises a device connection 1010, which is arranged on the mechanical part or the electronic part. The density relay outputs a contact signal via a signal generator 109. The communication module 4 is arranged at the shell of the electronic part or the shell of the mechanical part, or the communication module and the intelligent processor are integrally designed together. The pressure sensor is arranged in the electronic part shell or the mechanical part shell. The intelligent processor automatically controls the whole monitoring 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. The intelligent processor automatically controls the whole monitoring process based on embedded algorithms and control programs of a general 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 mainboard, an embedded main control board and the like, and comprises all peripherals, logics, input and output. The density relay also comprises a movement, a pointer and a dial, and is provided with a value display or a digital display device which is provided with a value display.
The intelligent processor collects pressure signals and temperature signals of the pressure sensor and the temperature sensor, and converts the pressure signals and the temperature signals into a pressure value P of 20 ℃ according to gas characteristics20(i.e. density value P)20). The gas density relay can convert the measured pressure value and temperature value into a pressure value P corresponding to 20 ℃ according to gas characteristics20Namely, the gas density relay has the functions of pressure and temperature measurement and software conversion. The intelligent processor may measure relative pressure and absolute pressure type density relays. The gas density relay has a man-machine interaction function: the data display interface is provided, and the current data value can be refreshed in real time; the device has a data input function and can input parameter set values. The intelligent processor is provided with an interface and can finish 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 electrical interface of the density relay has a protection function, and the interface cannot be damaged due to misconnection; or/and will not be disturbed by electromagnetic fields. The intelligent processor also comprises a communication module, and the information such as test data and/or results is transmitted in a long distance through the communication module. The communication module may be disposed on the electronics housing, or on the mechanical housing. The communication mode of the communication module can be a wired mode or a wireless mode. The gas density relay further comprises a multi-pass joint, and an electronic part of the gas density relay is arranged on the multi-pass joint. The gas density relay also comprises a multi-way joint and a self-sealing valve, and the electronic part and the self-sealing valve are arranged on the multi-way joint. The pressure detector and the pressure sensor are connected together through a connecting pipe. The electronic part is arranged behind the shell of the mechanical part of the gas density relay or on the shell or on the equipment connecting joint. The intelligent processor also comprises a clock, wherein the clock is arranged on the intelligent processor and can record the test time. The power supply (power module) further comprises a power supply circuit, or a battery, or a circularly rechargeable battery, or solar energy, or a power supply obtained by electricity getting of a mutual inductor, or an induction power supply and the like. Intelligent processorThe control can be completed through field control, background control or mutual interaction of the field control and the background control. The gas density relay has the functions of real-time online density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the like. The circuit of the intelligent processor comprises a protection component, in particular an anti-interference component. The gas density relay also comprises a micro-water sensor which can monitor the gas micro-water value on line. The gas density relay also comprises a decomposition product sensor which can monitor gas decomposition products on line. The gas density relay has a self-diagnosis function and can inform abnormality in time. Such as a wire break, short alarm, sensor damage, etc. When the density of the gas density relay monitors that the gas pressure has a rising trend on line, an abnormal notice should be put forward in time. The gas density relay also comprises a camera for monitoring the gas density relay. The gas density relay has protection to the environmental temperature of the electronic components, prevents the electronic components from working at too low temperature or too high temperature and enables the electronic components to work in an allowable temperature range. A heater and/or a radiator (fan) can be arranged, the heater is started at low temperature, and the radiator (fan) is started at high temperature, so that the pressure sensor and/or the integrated circuit and other electronic elements can reliably work in low-temperature or high-temperature environments. The gas density relay has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on the electrical equipment and the density relay. The pressure detector is a bourdon tube or a corrugated tube; the temperature compensation element is a bimetallic strip or a sealed air chamber sealed with compensation gas; the signal generators are microswitches or magnetic auxiliary electric contacts.
Fig. 4 is a utility model discloses a gas density monitoring system who constitutes by high performance teletransmission gas density relay, as shown in fig. 4, include: the high-voltage electrical equipment with the sulfur hexafluoride gas chamber and the high-performance remote transmission gas density relays are connected with the remote background detection system sequentially through the concentrator and the protocol converter; the high-performance remote transmission gas density relays are respectively arranged on the high-voltage electrical equipment of the corresponding sulfur hexafluoride gas chambers.
Gas density monitoring system, comprising of a high performance remote gas density relay, comprising: a plurality of high-voltage electrical equipment provided with sulfur hexafluoride gas chambers and a plurality of high-performance remote transmission gas density relays are connected with a remote background detection system through a concentrator and an IEC61850 protocol converter in sequence; the high-performance remote transmission gas density relays are respectively arranged on the high-voltage electrical equipment of the corresponding sulfur hexafluoride gas chambers.
As shown in fig. 4 and 5, the PC is an online monitoring background host and system, the Gateway is a network switch, the Server is an integrated application Server, the ProC is a protocol converter/online monitoring intelligent unit, the HUB is a concentrator, and Z is a high-performance remote gas density relay. The online monitoring system architecture: the system diagrams of the simple architecture (fig. 4), the conventional architecture (fig. 5), the complex architecture, and the like are detailed. System architecture diagram and brief description: 1. a background software platform: based on Windows, Linux, and the like, or VxWorks, Android, Unix, UCos, FreeRTOS, RTX, embOS, MacOS. 2. Background software key business module, basic function: such as rights management, device management, data storage queries, etc.; and user management, alarm management, real-time data, historical data, real-time curves, historical curves, configuration management, data acquisition, data analysis, recording conditions, and exception handling. 3. Interface configuration: such as Form interface, Web interface, configuration interface, etc. The monitoring system can also be an architecture system diagram in a wireless transmission mode, a wireless module and a high-performance remote transmission gas density relay can be integrated or separated, and the specific scheme can be flexible.
This monitoring system can real-time supervision circuit breaker, the inside SF6 gaseous temperature of electrical equipment such as GIS, pressure, density, physical quantity such as little water and its trend of change, and have communication interface, upload background system with data, realize the circuit breaker, the online monitoring function of physical quantity such as electric equipment SF6 gaseous density such as GIS, little water, and can set for the warning limit in a flexible way, inquire historical data on the spot, accurate analysis judges equipment gas leakage trend and gas leakage rate, discover abnormal conditions in advance to equipment, thereby guarantee the safe operation of electrical equipment and the whole system of transformer substation. The on-line monitoring of the electrical equipment of the transformer substation, especially an unattended station, is really realized. The method plays an important role in improving the safe operation and operation management level of a power grid system, developing prospective diagnosis and trend analysis and reducing unplanned power failure maintenance.
The gas density monitoring system comprises high-performance remote gas density relays, and the communication modes of the high-performance remote gas density relays are wired or wireless. Wired communication modes comprise industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carriers and the like; the wireless communication mode is that the sensor embeds 5G/NB-IOT communication module (for example 5G, NB-IOT), 2G/3G/4G/5G etc. WIFI, bluetooth, Lora, loraan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar etc. upload various sensor data to thing networking cloud platform. The hub adopts an RS485 hub, and the IEC61850 protocol converter is also respectively connected with the network service printer and the network data router.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (33)
1. An overvoltage-resistant remote transmission gas density relay is characterized by comprising a shell, a pressure sensor fixing seat, a temperature sensor, a mechanical part and an electronic part; the mechanical part includes: the pressure detector, the temperature compensation element, a plurality of signal generators for sending contact signals and a signal adjusting mechanism; the electronic part includes: the intelligent processor, the communication module and the power supply; the pressure sensor is communicated with the pressure detector on the gas path; what is needed isThe intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module; the intelligent processor acquires pressure signals through the pressure sensor, acquires temperature signals through the temperature sensor, and obtains corresponding density value P through processing of the intelligent processor according to the gas pressure-temperature characteristic20And remotely transmitting the density value P through the communication module20One or more of a pressure value and a temperature value, and further realize these numerical values of on-line monitoring electrical equipment, pressure sensor seals through a plurality of insulating parts and fixes on the pressure sensor fixing base, and the shell of pressure sensor and pressure sensor fixing base are mutual insulating.
2. An overvoltage resistant remote gas density relay according to claim 1, further comprising an electric field shield disposed on an outer surface of the pressure sensor and/or the electronics section.
3. An overvoltage resistant remote gas density relay according to claim 1, further comprising a magnetic field shield disposed on an outer surface of the pressure sensor and/or the electronics section.
4. An overvoltage resistant remote gas density relay according to claim 1 wherein said housing includes a mechanical portion housing and an electronic portion housing, said mechanical portion housing and said electronic portion housing being independent or separate from each other.
5. An overvoltage resistant, remote gas density relay according to claim 1 wherein the temperature sensor is located in close proximity to the temperature compensation element.
6. The overvoltage resistant, remote gas density relay according to claim 1, further comprising a thermal insulator disposed between the mechanical section housing and the electronic section housing; or at the power supply.
7. The overvoltage resistant remote gas density relay according to claim 1, wherein the mechanical part housing is filled with a shock absorber fluid and is provided with a lead wire seal, and the connection wire of the temperature sensor is connected to the intelligent processor through the lead wire seal.
8. The overvoltage resistant, remote gas density relay according to claim 1, wherein the power supply is located remotely from the temperature sensor and the temperature compensation element.
9. An overvoltage resistant, remote gas density relay according to claim 1, further comprising equipment connection terminals disposed on the mechanical or electrical portion.
10. The overvoltage resistant remote gas density relay according to claim 1, wherein the communication module is disposed at an electronic part housing or a mechanical part housing, or is integrally designed with the intelligent processor; the pressure sensor is arranged in the electronic part shell or the mechanical part shell.
11. An overvoltage resistant remote gas density relay according to claim 1 further including a movement, hands, dials having a display; the indication display comprises a digital or liquid crystal display device.
12. An overvoltage resistant remote gas density relay according to claim 2 wherein the electric field shield is disposed inside or outside the electronics section housing.
13. An overvoltage resistant remote gas density relay according to claim 3 wherein the magnetic field shield is disposed inside or outside the electronics section housing.
14. An overvoltage resistant, remote gas density relay according to claim 1 wherein the pressure sensor is shielded.
15. An overvoltage resistant remote gas density relay according to claim 1 wherein the intelligent processor and/or communication module is provided with shielding.
16. An overvoltage resistant remote gas density relay according to claim 1 wherein the intelligent processor measures a relative pressure or absolute pressure type density relay.
17. The overvoltage resistant, remote gas density relay according to claim 1, wherein the gas density relay has a human machine interaction function module: the data display interface is included, and the current data value can be refreshed in real time; and a data input area for inputting parameter setting values.
18. The overvoltage resistant, remote gas density relay according to claim 1, wherein the intelligent processor has an interface to complete test data storage; and/or test data derivation; and/or the test data may be printed; and/or carrying out data communication with an upper computer; and/or analog quantity and digital quantity information can be input.
19. The overvoltage resistant, remote gas density relay according to claim 1, wherein the electrical interface of the density relay is an anti-misconnection protection and anti-electromagnetic interference interface.
20. The overvoltage resistant remote gas density relay according to claim 1, wherein the intelligent processor enables remote transmission of information through a communication module disposed on the electronics housing or the mechanical housing.
21. The overvoltage resistant remote gas density relay according to claim 1, further comprising a multi-port junction and a self-sealing valve, wherein the electronic portion and the self-sealing valve are mounted on the multi-port junction.
22. The overvoltage resistant remote gas density relay according to claim 1, wherein the pressure sensor and the pressure detector are connected together by a connecting tube.
23. An overvoltage resistant remote gas density relay according to claim 1 wherein said electronics section is located behind or on the housing of said mechanical section or on the equipment connection fitting.
24. The overvoltage resistant remote gas density relay according to claim 1, wherein the smart processor carries a timer.
25. The overvoltage resistant remote gas density relay according to claim 1, further comprising a micro water sensor for on-line monitoring of a gas micro water level.
26. The overvoltage resistant remote gas density relay according to claim 1 further comprising a analyte sensor for on-line monitoring of gas analytes.
27. An overvoltage resistant remote gas density relay according to claim 1 having a self diagnostic module to signal abnormalities including but not limited to wire breakage, short circuit alarm, sensor damage.
28. The overvoltage resistant remote gas density relay according to claim 1 further comprising an analysis system for analyzing the gas density monitoring, the performance of the gas density relay, and the monitoring components to determine whether an anomaly is present in the electrical or mechanical portion.
29. The overvoltage resistant remote gas density relay according to claim 1, wherein the pressure detector is a bourdon tube or a bellows; the temperature compensation element is a bimetallic strip or a sealed air chamber sealed with compensation gas; the signal generators are microswitches or magnetic auxiliary electric contacts.
30. The overvoltage resistant, remote gas density relay according to claim 1, further comprising a plurality of insulators, wherein said pressure sensor is insulated from said electronics housing, said machinery housing, and said equipment connection terminals by said plurality of insulators; or the housing of the pressure sensor and the housing of the remote gas density relay are insulated.
31. A gas density monitoring system comprising said overvoltage resistant remote gas density relay, comprising: the overvoltage-resistant remote gas density relays are connected with a remote background detection system sequentially through the concentrator and the protocol converter; the overvoltage-resistant remote transmission gas density relays are respectively arranged on the electrical equipment of the corresponding gas chambers.
32. A gas density monitoring system consisting of said overvoltage resistant remote gas density relay according to claim 31, wherein said protocol converter is a protocol converter including but not limited to IEC61850 or IEC104 protocol converter.
33. A gas density monitoring system composed of said overvoltage-resistant remote gas density relay according to claim 32, wherein the hub is RS485 hub, and said IEC61850 protocol converter or IEC104 protocol converter is further connected to the network service printer and the network data router, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921458721.1U CN211528621U (en) | 2019-09-04 | 2019-09-04 | Overvoltage-resistant remote transmission gas density relay |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921458721.1U CN211528621U (en) | 2019-09-04 | 2019-09-04 | Overvoltage-resistant remote transmission gas density relay |
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| CN211528621U true CN211528621U (en) | 2020-09-18 |
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| CN201921458721.1U Active CN211528621U (en) | 2019-09-04 | 2019-09-04 | Overvoltage-resistant remote transmission gas density relay |
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