CN210270084U - Online monitoring device for motor operating mechanism of high-voltage circuit breaker - Google Patents
Online monitoring device for motor operating mechanism of high-voltage circuit breaker Download PDFInfo
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- CN210270084U CN210270084U CN201920798818.0U CN201920798818U CN210270084U CN 210270084 U CN210270084 U CN 210270084U CN 201920798818 U CN201920798818 U CN 201920798818U CN 210270084 U CN210270084 U CN 210270084U
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Abstract
The utility model provides a high voltage circuit breaker motor operating mechanism on-line monitoring device relates to the electrical automation control technology field. The device comprises a DSP controller, an upper computer, an energy storage voltage detection circuit for detecting the voltage of an energy storage capacitor, a Hall current sensor for detecting the current of a three-phase winding of a driving motor, an acceleration sensor for detecting the motion acceleration and mechanical vibration information of a moving contact, a temperature sensor for detecting the temperature of the moving contact, a moving contact closing detection circuit for detecting the closing information of the moving contact, a rotor position detection unit for detecting the position of a rotor of the driving motor, an oscilloscope for displaying the closing information of the moving contact, a communication unit for realizing the information intercommunication between the DSP controller and the upper computer, and a low-voltage direct-current power supply for supplying power to the energy storage voltage detection circuit, the Hall current sensor, the DSP controller, the acceleration sensor, the temperature sensor. The utility model discloses can improve high voltage circuit breaker motor operating mechanism's reliability greatly, reduce electric power system trouble risk.
Description
Technical Field
The utility model relates to an electrical automation control technical field especially relates to a high voltage circuit breaker motor operating mechanism on-line monitoring device.
Background
High voltage circuit breakers are important switching devices in electrical power systems. When a high-voltage circuit breaks down, the relay protection device quickly cuts off fault current from the high-voltage circuit breaker, so that normal operation of the fault-free part of the high-voltage circuit breaker is ensured. Therefore, the reliability of the motor operating mechanism of the high-voltage circuit breaker has important significance for the safe operation of the power system. The state quantity needing to be monitored by the high-voltage circuit breaker motor has a plurality of types, including voltage detection of an energy storage device of the high-voltage circuit breaker motor operating mechanism, current detection of a three-phase winding of a driving motor of the high-voltage circuit breaker motor operating mechanism, rotating speed detection of the driving motor of the high-voltage circuit breaker motor operating mechanism, speed and stroke detection of a moving contact of the high-voltage circuit breaker motor operating mechanism, temperature detection of the moving contact of the high-voltage circuit breaker motor operating mechanism, mechanical vibration detection of the high-voltage circuit breaker motor operating mechanism and closing signal detection of the. The early monitoring means is basically off-line monitoring, and the off-line monitoring mainly has two drawbacks, namely that the fault sign is not timely found, and the service life of the circuit breaker is influenced by excessive disassembly and assembly.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, provide a high voltage circuit breaker motor operating mechanism on-line monitoring device, realize the on-line monitoring to high voltage circuit breaker motor operating mechanism.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: an online monitoring device for a motor operating mechanism of a high-voltage circuit breaker comprises an energy storage voltage detection circuit, a Hall current sensor, an acceleration sensor, a temperature sensor, a moving contact closing detection circuit, a rotor position detection unit, a DSP (digital signal processor) controller, an upper computer, a communication unit, a current conditioning circuit, an acceleration conditioning circuit and a low-voltage direct-current power supply;
the input end of the energy storage voltage detection circuit is connected to the two ends of the anode and the cathode of the energy storage capacitor of the motor operating mechanism of the high-voltage circuit breaker, and the output end of the energy storage voltage detection circuit is connected to the DSP controller; the Hall current sensor penetrates through a three-phase winding coil of a driving motor of a motor operating mechanism of the high-voltage circuit breaker, the output end of the Hall current sensor is connected to the input end of a current conditioning circuit, and the output end of the current conditioning circuit is connected to the DSP controller; the rotor position detection unit is arranged on the side of a driving motor main shaft of a motor operating mechanism of the high-voltage circuit breaker, and the output end of the rotor position detection unit is connected to the DSP controller; the temperature sensor is arranged on the moving contact of the high-voltage circuit breaker, and the output end of the temperature sensor is connected to the DSP controller; the acceleration sensor is arranged on an insulating pull rod of a motor operating mechanism of the high-voltage circuit breaker, the output end of the acceleration sensor is connected to the input end of an acceleration conditioning circuit, and the output end of the acceleration conditioning circuit is connected to the DSP controller; the moving contact closing detection circuit is connected to two sides of a moving contact and a fixed contact of the high-voltage circuit breaker; and the upper computer is connected with the DSP controller through the communication unit.
Preferably, the energy storage voltage detection circuit comprises a first voltage sensor, a first operational amplifier OP07, a first operational amplifier LM358, and two operational amplifiers connected in series.
Preferably, the moving contact closing detection circuit includes a detection resistor and an oscilloscope, the detection resistor is connected to two sides of the moving contact and the static contact of the high-voltage circuit breaker, and the oscilloscope is connected in parallel to two ends of the detection resistor R1.
Preferably, the DSP controller adopts a DSP chip with a model of TMS320F 28335; the rotor position detection unit adopts a photoelectric encoder; the communication unit comprises a first RS232 serial port of the upper computer, a first MAX3232 chip and a first controller interface.
Preferably, the current conditioning circuit employs two operational amplifiers connected in series.
Preferably, the acceleration conditioning circuit comprises a first ISOO124 isolator chip, a first TL1082 operational amplifier and a second TL1082 operational amplifier connected in sequence.
Utility model adopts the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model provides a high voltage circuit breaker motor operating mechanism on-line monitoring device, (1) acceleration sensor, temperature sensor simple to operate, do not need specific installing support, can directly monitor the mechanical structure of high voltage circuit breaker motor operating mechanism and the acceleration, speed, stroke and the temperature of moving contact, detect the precision height, measuring error is little; (2) the mutual cooperation of multiple sensitive and high-precision sensors can well complete the tasks of on-line monitoring and fault diagnosis in a complex environment of the high-voltage circuit breaker, and a good platform is provided for the remote control of unmanned operation and big data fault diagnosis of a background; (3) the acceleration sensor, the photoelectric encoder and the Hall current sensor are matched together to form a three-feedback control system of acceleration, position and current of the high-voltage circuit breaker motor operating mechanism. The movable contact of the circuit breaker can be better controlled to move according to a preset ideal stroke curve, contact collision can be effectively reduced, coil burning is avoided, and the service life of the motor operating mechanism is prolonged.
Drawings
Fig. 1 is a block diagram of an online monitoring device for a motor operating mechanism of a high-voltage circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of an online monitoring device for a motor operating mechanism of a high-voltage circuit breaker according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a storage voltage detection circuit according to an embodiment of the present invention;
fig. 4 is a schematic connection diagram of a current conditioning circuit of a DSP controller according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a communication unit according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a current conditioning circuit according to an embodiment of the present invention;
fig. 7 is a circuit diagram of an acceleration conditioning circuit according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a hall current sensor according to an embodiment of the present invention;
fig. 9 is a circuit diagram of a low-voltage dc power supply according to an embodiment of the present invention;
fig. 10 is a flowchart of an online monitoring method for a motor operating mechanism of a high-voltage circuit breaker according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
An online monitoring device for a motor operating mechanism of a high-voltage circuit breaker is shown in figure 1 and comprises an energy storage voltage detection circuit, a Hall current sensor, an acceleration sensor, a temperature sensor, a moving contact closing detection circuit, a rotor position detection unit, a DSP (digital signal processor) controller, an upper computer, a communication unit, a current conditioning circuit, an acceleration conditioning circuit and a low-voltage direct-current power supply;
a connection structure of an online monitoring device of a high-voltage circuit breaker motor operating mechanism is shown in figure 2, wherein the input end of an energy storage voltage detection circuit is connected to the two ends of the anode and the cathode of an energy storage capacitor of the high-voltage circuit breaker motor operating mechanism, and the output end of the energy storage voltage detection circuit is connected to a DSP controller; the Hall current sensor penetrates through a three-phase winding coil of a driving motor of a motor operating mechanism of the high-voltage circuit breaker, the output end of the Hall current sensor is connected to the input end of a current conditioning circuit, and the output end of the current conditioning circuit is connected to the DSP controller; the rotor position detection unit is arranged on the side of a driving motor main shaft of a motor operating mechanism of the high-voltage circuit breaker, and the output end of the rotor position detection unit is connected to the DSP controller; the temperature sensor is arranged on the moving contact of the high-voltage circuit breaker, and the output end of the temperature sensor is connected to the DSP controller; the acceleration sensor is arranged on an insulating pull rod of a motor operating mechanism of the high-voltage circuit breaker, the output end of the acceleration sensor is connected to the input end of an acceleration conditioning circuit, and the output end of the acceleration conditioning circuit is connected to the DSP controller; the moving contact closing detection circuit is connected to two sides of a moving contact and a fixed contact of the high-voltage circuit breaker; the upper computer is connected with the DSP controller through a communication unit; the moving contact closing detection circuit comprises a detection resistor and an oscilloscope, wherein the detection resistor is connected to two sides of a moving contact and a fixed contact of the high-voltage circuit breaker, and the oscilloscope is connected to two ends of a detection resistor R1 in parallel.
The low-voltage direct-current power supply supplies power for the energy storage voltage detection circuit, the Hall current sensor, the driving motor three-phase winding, the acceleration sensor, the temperature sensor, the moving contact closing detection circuit, the rotor position detection unit, the oscilloscope and the upper computer respectively.
The energy storage voltage detection circuit is shown in fig. 3, and includes a first voltage sensor, a first operational amplifier OP07, a first operational amplifier LM358, and two operational amplifiers connected in series. In this embodiment, pin 1 of the energy storage voltage detection circuit is connected to the anode of the energy storage capacitor, pin 2 is connected to the cathode of the energy storage capacitor, pin 3 is respectively connected to pin ADCINA0 of the DSP processor, pins 12 and 16 are connected to pin +15V of the low voltage dc power supply, and pins 11 and 15 are connected to pin-15V of the low voltage dc power supply.
The rotor position detection unit adopts a photoelectric encoder;
the DSP controller adopts a DSP chip with the model of TMS320F28335 as shown in FIG. 4; pins ADCINB 0-ADCINB 2 of the DSP processor are connected with a pin 1 of the current conditioning circuit, a pin ADCINB3 is connected with the output end of the temperature sensor, a pin ADCINA0 is connected with a pin 3 of the energy storage voltage detection circuit, a pin ADCINA1 is connected with the acceleration conditioning circuit, pins PWM 1-PWM 6 are respectively connected with 6 IGBT switching tubes of the inverter IPM, a pin VCC is connected with a pin +5V of the low-voltage direct-current power supply, a pin CAP2-4 is connected with the optical encoder, and a SCIRXDA port are connected with a port Tin1 and a port Rout1 of the communication unit.
The communication unit is shown in fig. 5 and comprises a first RS232 serial port of the upper computer, a first MAX3232 chip and a first controller interface, and the communication between the upper computer and the DSP controller can be realized through serial port communication to perform man-machine interaction.
The current conditioning circuit adopts two operational amplifiers connected in series to convert the driving motor three-phase winding current collected by the hall current sensor into the identification range of the DSP chip as shown in fig. 6. In this embodiment, the two operational amplifiers are both 0P284 in type, the pin 0 is connected to the pin 3 of the hall current sensor, the pin 1 is respectively connected to the pins ADCINB0, ADCINB1 and ADCINB2 of the DSP processor, the pin 8 is connected to the pin +15V of the low voltage dc power supply, and the pin 4 is connected to the pin-15V of the low voltage dc power supply.
The acceleration conditioning circuit comprises a first ISOO124 isolated chip, a first TL1082 operational amplifier and a second TL1082 operational amplifier which are connected in sequence as shown in FIG. 7, and is powered by +5V, and the output of the acceleration conditioning circuit is 0.825-4.178V; ISOO124 is adopted to isolate the chip for high-precision isolation, so that a peripheral large-current signal is isolated, and the chip is prevented from being burnt. The use of TL082 operational amplifiers not only increases the input impedance of the circuit, but also primarily amplifies the signal to within the allowable input voltage range of the a/D conversion device. The acceleration signal is input to ISO124 for isolation after low-pass filtering, a differential circuit is formed by R24, R25, R26, R27 and U8A, a 0.825-4.175V voltage signal is converted into 0-3V, the input range of an AD chip is met, and the signal is not distorted. The acceleration sensor model adopted in this embodiment is LC 0102T.
In this embodiment, the model selected by the hall current sensor is CHF-400B, as shown in fig. 8, pin 1 is connected to pin +12V of the low-voltage dc power supply, pin 2 is connected to pin-12V of the low-voltage dc power supply, pin 4 is connected to GND of the low-voltage dc power supply, and pin 3 is connected to pin 0 of the current conditioning circuit.
The input end of the low-voltage direct-current power supply is connected to a 220V power grid, and the +12V pin is connected to a moving contact closing detection circuit, a pin 1 of a Hall current sensor, pins 2 and 4 of a current conditioning circuit, and a pin 1 of an acceleration sensor, and the-12V pin is connected to a pin 2 of the Hall current sensor, pins 3 and 5 of the current conditioning circuit, and a pin 2 of the acceleration sensor. A pin of +15V of the low-voltage direct-current power supply is connected to pins 12 and 16 of the energy storage voltage detection circuit, and a pin of-15V is connected to pins 11 and 15 of the energy storage voltage detection circuit; the +5V pin is connected to the acceleration conditioning circuit, the VCC pin of the DSP processor, and the photoelectric encoder.
An online monitoring method for a motor operating mechanism of a high-voltage circuit breaker is shown in fig. 10, and comprises the following steps:
step 1: the mains supply power grid charges an energy storage capacitor of a high-voltage circuit breaker motor operating mechanism through a rectifier, an energy storage voltage detection circuit detects the voltage at two ends of the energy storage capacitor in real time, and if the voltage reaches a target voltage, a DSP controller waits for an upper computer switching-on and switching-off control instruction; the commercial power grid supplies power to the Hall current sensor, the energy storage voltage detection circuit, the photoelectric encoder, the temperature sensor, the current conditioning circuit, the acceleration sensor, the acceleration conditioning circuit and the DSP controller through the low-voltage direct-current power supply;
step 2: the upper computer sends a closing instruction to the DSP controller, the DSP controller controls the high-voltage circuit breaker motor operating mechanism to start working, and a moving contact of the high-voltage circuit breaker motor operating mechanism performs closing action according to a preset ideal stroke characteristic curve;
and step 3: the device comprises an energy storage voltage detection circuit, a current sensor, an acceleration sensor, a DSP controller, a temperature sensor and a control circuit, wherein the energy storage voltage detection circuit detects the voltage at two ends of an energy storage capacitor of a motor operating mechanism of the high-voltage circuit breaker in real time and transmits the voltage to an ADC unit of the DSP controller; the moving contact closing detection circuit detects closing and bouncing information of a moving contact and a fixed contact of a motor operating mechanism of the high-voltage circuit breaker in real time;
and 4, step 4: if the voltage at the two ends of the detection resistor is detected by the digital oscilloscope, the closing of the moving contact and the static contact is proved to be finished, and meanwhile, if the voltage waveform of the detection resistor is unstable, the moving contact and the static contact are shown to generate multiple contact bouncing;
and 5: the DSP controller processes the received energy storage voltage signal of the motor operating mechanism of the high-voltage circuit breaker, the current signal of a driving motor winding, the moving contact acceleration signal, the moving contact temperature signal and the mechanical structure vibration signal; performing time integration on the acceleration signal of the moving contact to obtain moving contact speed information, and performing time integration on the speed information to obtain moving contact stroke information;
step 6: the DSP controller compares the processed energy storage voltage information of the motor operating mechanism of the high-voltage circuit breaker, the current information of a three-phase winding of a driving motor, the acceleration information of a moving contact, the speed information of the moving contact, the stroke information of the moving contact and the vibration information of a mechanical structure with preset capacitance voltage information, winding current information of the driving motor, moving contact information of the motor operating mechanism and mechanical vibration inherent information of the motor operating mechanism in an existing control parameter database of the motor operating mechanism of the high-voltage circuit breaker, and if an actual mechanical vibration signal is different from mechanical inherent vibration frequency, the fact that the mechanical structure breaks down is proved; if the actual moving stroke and speed curve of the moving contact are consistent with the stroke and speed curve of the given moving contact, the control parameters are proved to be reasonable, otherwise, the control parameters are unreasonable;
and 7: the DSP controller transmits energy storage capacitor voltage information, driving motor three-phase winding current, breaker moving contact temperature, speed and stroke and insulation pull rod vibration information to an upper computer through a communication serial port, a worker overhauls a high-voltage breaker motor operating mechanism according to information displayed by the upper computer or feeds back adjusted PI control parameters to the DSP controller, and the DSP controller controls the high-voltage breaker motor operating mechanism to make corresponding adjustment.
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 it; 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; but such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and the scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a high voltage circuit breaker motor operating mechanism on-line monitoring device which characterized in that: the device comprises an energy storage voltage detection circuit, a Hall current sensor, an acceleration sensor, a temperature sensor, a moving contact closing detection circuit, a rotor position detection unit, a DSP controller, an upper computer, a communication unit, a current conditioning circuit, an acceleration conditioning circuit and a low-voltage direct-current power supply;
the input end of the energy storage voltage detection circuit is connected to the two ends of the anode and the cathode of the energy storage capacitor of the motor operating mechanism of the high-voltage circuit breaker, and the output end of the energy storage voltage detection circuit is connected to the DSP controller; the Hall current sensor penetrates through a three-phase winding coil of a driving motor of a motor operating mechanism of the high-voltage circuit breaker, the output end of the Hall current sensor is connected to the input end of a current conditioning circuit, and the output end of the current conditioning circuit is connected to the DSP controller; the rotor position detection unit is arranged on the side of a driving motor main shaft of a motor operating mechanism of the high-voltage circuit breaker, and the output end of the rotor position detection unit is connected to the DSP controller; the temperature sensor is arranged on the moving contact of the high-voltage circuit breaker, and the output end of the temperature sensor is connected to the DSP controller; the acceleration sensor is arranged on an insulating pull rod of a motor operating mechanism of the high-voltage circuit breaker, the output end of the acceleration sensor is connected to the input end of an acceleration conditioning circuit, and the output end of the acceleration conditioning circuit is connected to the DSP controller; the moving contact closing detection circuit is connected to two sides of a moving contact and a fixed contact of the high-voltage circuit breaker; and the upper computer is connected with the DSP controller through the communication unit.
2. The on-line monitoring device for the motor operating mechanism of the high-voltage circuit breaker according to claim 1, wherein: the energy storage voltage detection circuit comprises a first voltage sensor, a first operational amplifier OP07, a first operational amplifier LM358 and two operational amplifiers which are connected in series.
3. The on-line monitoring device for the motor operating mechanism of the high-voltage circuit breaker according to claim 1, wherein: the moving contact closing detection circuit comprises a detection resistor and an oscilloscope, wherein the detection resistor is connected to two sides of a moving contact and a fixed contact of the high-voltage circuit breaker, and the oscilloscope is connected to two ends of a detection resistor R1 in parallel.
4. The on-line monitoring device for the motor operating mechanism of the high-voltage circuit breaker according to claim 1, wherein: the DSP controller adopts a DSP chip with the model of TMS320F 28335; the rotor position detection unit adopts a photoelectric encoder; the communication unit comprises a first RS232 serial port of the upper computer, a first MAX3232 chip and a first controller interface.
5. The on-line monitoring device for the motor operating mechanism of the high-voltage circuit breaker according to claim 1, wherein: the current conditioning circuit adopts two operational amplifiers connected in series.
6. The on-line monitoring device for the motor operating mechanism of the high-voltage circuit breaker according to claim 1, wherein: the acceleration conditioning circuit comprises a first ISOO124 isolation chip, a first TL1082 operational amplifier and a second TL1082 operational amplifier which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920798818.0U CN210270084U (en) | 2019-05-30 | 2019-05-30 | Online monitoring device for motor operating mechanism of high-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920798818.0U CN210270084U (en) | 2019-05-30 | 2019-05-30 | Online monitoring device for motor operating mechanism of high-voltage circuit breaker |
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| CN210270084U true CN210270084U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920798818.0U Expired - Fee Related CN210270084U (en) | 2019-05-30 | 2019-05-30 | Online monitoring device for motor operating mechanism of high-voltage circuit breaker |
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| CN (1) | CN210270084U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133492A (en) * | 2019-05-30 | 2019-08-16 | 沈阳工业大学 | A kind of high-voltage circuitbreaker electric operating mechanism on-Line Monitor Device and method |
| CN111640599A (en) * | 2020-05-30 | 2020-09-08 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
-
2019
- 2019-05-30 CN CN201920798818.0U patent/CN210270084U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133492A (en) * | 2019-05-30 | 2019-08-16 | 沈阳工业大学 | A kind of high-voltage circuitbreaker electric operating mechanism on-Line Monitor Device and method |
| CN111640599A (en) * | 2020-05-30 | 2020-09-08 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
| CN111640599B (en) * | 2020-05-30 | 2021-03-16 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
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