CN209746083U - Offline simulation debugging device for arc suppression coil - Google Patents

Offline simulation debugging device for arc suppression coil Download PDF

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Publication number
CN209746083U
CN209746083U CN201920356621.1U CN201920356621U CN209746083U CN 209746083 U CN209746083 U CN 209746083U CN 201920356621 U CN201920356621 U CN 201920356621U CN 209746083 U CN209746083 U CN 209746083U
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module
relay
contact
output
transformer
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Inventor
刘炳正
郭宏展
周斌
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Yiyang Power Supply Branch Hunan Electric Power Co Ltd
State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
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Yiyang Power Supply Branch Hunan Electric Power Co Ltd
State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
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Abstract

The utility model discloses an arc suppression coil off-line simulation debugging device, which comprises a power module, a rectifier module, a switch tube module, a transformer module, a change-over switch module, a damping resistance module, a capacitor module, an output sampling module, a controller module and a PWM driving module; the power supply module supplies power; an externally input power supply is rectified by the rectifying module, voltage is converted by the switching tube module, and the voltage is transmitted to the damping resistance module and the capacitor module by the transformer module; the switch module switches the connection relation between the damping resistance module and the capacitor module; the output sampling module samples output voltage and current signals and uploads the output voltage and current signals to the controller module; the controller module drives the switch module to work and outputs a PWM control signal to drive the switch tube module to work through the PWM driving module. The utility model discloses a simple and reliable circuit design has realized the off-line simulation debugging to the arc suppression coil of current system, simple structure moreover, and the circuit is reliable and stable and convenient to use.

Description

Offline simulation debugging device for arc suppression coil
Technical Field
The utility model particularly relates to an arc suppression coil off-line simulation debugging device.
Background
With the development of economic technology, electric energy becomes essential secondary energy in production and life of people, and endless convenience is brought to production and life of people. Therefore, reliable and stable operation of the power system becomes one of the most important tasks of the power system.
The arc suppression coil is used for compensating system capacitance current when a system has a single-phase earth fault, so that the generation of overvoltage is suppressed. When the system normally operates, the arc suppression coil is grounded through the damping resistor to prevent the system from resonating, and when the system has single-phase ground fault, the voltage division of the damping resistor enables the piezoresistor to act and trigger and conduct the bypass thyristor thereof in a self-triggering mode, so that the arc suppression coil is directly grounded to play a compensation role, and whether the bypass thyristor reliably acts or not is seen to directly determine the compensation role of the arc suppression coil.
However, the arc suppression coil is lack of technical means for evaluating the comprehensive performance of the whole arc suppression coil complete device after installation and operation, and detection means are not available such as whether the bypass thyristor can operate reliably or not, so that the installation and operation of the arc suppression coil are in an open management and detection stage, and great hidden danger is brought to the operation of a power system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can carry out off-line simulation debugging to arc suppression coil, low cost, the high and convenient to use's of reliability arc suppression coil off-line simulation debugging device.
The utility model provides an arc suppression coil off-line simulation debugging device, which comprises a power module, a rectifier module, a switch tube module, a transformer module, a change-over switch module, a damping resistance module, a capacitance module, an output sampling module, a controller module and a PWM driving module; the rectifier module, the switch tube module and the transformer module are sequentially connected in series; the output end of the transformer module is simultaneously connected with the change-over switch module, the damping resistor module and the capacitor module; the output sampling module, the change-over switch module and the PWM driving module are all connected with the controller module; the output end of the PWM driving module is connected with the switching tube module; the power module supplies power to the arc suppression coil offline simulation debugging device; an externally input power supply is rectified into direct current through the rectifying module, then voltage conversion is carried out through the switching tube module, and the direct current is transmitted to the damping resistance module and the capacitor module through the transformer module; the switch module is used for switching the connection relation between the damping resistance module and the capacitance module; the output sampling module is used for sampling voltage and current signals output by the debugging device and uploading the voltage and current signals to the controller module; the controller module is used for driving the change-over switch module to work and outputting a PWM control signal to the PWM driving module according to the uploaded output voltage and output current signals; the PWM driving module is used for generating a switching tube driving signal to drive the switching tube module to work.
The switch tube module is a full-bridge switch module formed by 4 groups of IGBTs.
The output sampling module comprises a voltage sampling circuit, a current sampling circuit and an AD conversion circuit; the voltage sampling circuit is used for sampling an output voltage signal and uploading the output voltage signal to the AD conversion circuit; the current sampling circuit is used for sampling an output current signal and uploading the output current signal to the AD conversion circuit; the AD conversion circuit is used for converting the uploaded analog quantity voltage sampling signal and the analog quantity current sampling signal into a digital signal and then uploading the digital signal to the controller module.
The AD conversion circuit is a circuit formed by an AD conversion chip with the model number of AD7865 AS.
The controller module is a circuit formed by an ARM chip of which the model is STM32F 103.
The PWM driving module is a circuit formed by a PWM driving chip with the model number of IGCM20F60 GA.
The transformer module comprises a first transformer and a second transformer, the input ends of the first transformer and the second transformer are connected in parallel and then connected with the output end of the switch tube module, and the output ends of the first transformer and the second transformer are connected with the change-over switch module.
The change-over switch module comprises three groups of relays; the control coil of the first relay is connected with the controller module, the contacts of the first relay comprise a first relay first contact and a first relay second contact, the first relay first contact comprises a first relay first contact common end, a first relay first normally closed contact and a first relay first normally open contact, the first relay second contact comprises a first relay second contact common end, the first relay second normally closed contact and the first relay second normally open contact are connected, the common end of the first relay first contact is connected with the output common end of the first transformer, the first relay first normally closed contact is connected with the output common end of the second transformer, the common end of the first relay second contact is connected with the output anode of the second transformer, the first relay second normally closed contact is connected with the output anode of the first transformer, and the first relay first normally open contact is connected with the first relay second normally open contact; the control coil of the second relay is connected with the controller module, the contacts of the second relay comprise a first contact of the second relay and a second contact of the second relay, the first contact of the second relay comprises a common end of the first contact of the second relay, a first normally closed contact of the second relay and a first normally open contact of the second relay, the second contact of the second relay comprises a common end of the second contact of the second relay, a second normally closed contact of the second relay and a second normally open contact of the second relay, the common end of the first contact of the second relay is connected with the output anode of the first transformer, the first normally closed contact of the second relay is simultaneously connected with the capacitor module and the common end of the second contact of the third relay, the first normally open contact of the second relay is connected with the damping resistor module, the common end of the second contact of the second relay is a voltage measurement anode, and the second normally closed contact of the second relay is an output end, a second normally open contact of the second relay is connected with the output anode of the first transformer; the control coil of third relay connects controller module, the contact of third relay includes third relay first contact and third relay second contact, third relay first contact includes third relay first contact common port, the first normally closed contact of third relay and the first normally open contact of third relay, third relay second contact includes third relay second contact common port, third relay second normally closed contact and third relay second normally open contact, third relay first contact is whole unsettled, the first normally closed contact of second relay is connected to third relay second contact common port, third relay second normally closed contact is unsettled, third relay second normally open contact connects the electric capacity module.
The capacitor module comprises a first capacitor and a second capacitor, one end of the first capacitor is connected with a first normally closed contact of the second relay, and the other end of the first capacitor is simultaneously connected with the other end of the second capacitor, the other end of the damping resistor module and a second normally closed contact of the second relay; one end of the second capacitor is connected with a second normally open contact of the third relay; one end of the damping resistance module is connected with a first normally open contact of the second relay.
When the first relay and the second relay are powered off and the third relay is powered on, the arc suppression coil off-line simulation debugging device is used for carrying out a resonance test; when the first relay, the second relay and the third relay are all electrified, the arc suppression coil off-line simulation debugging device is used for carrying out thyristor action tests; when a resonance test is carried out, the output end of the arc suppression coil off-line simulation debugging device is connected to the high-voltage end of the arc suppression coil; when the thyristor action test is carried out, the output end of the arc suppression coil off-line simulation debugging device is connected to the A pole of the thyristor, and the connecting line between the damping resistor and one end of the thyristor needs to be disconnected.
The utility model provides a this kind of arc suppression coil off-line simulation debugging device through simple reliable circuit design, has realized the off-line simulation debugging to the arc suppression coil of current system, moreover the utility model discloses simple structure, the circuit is reliable and stable and convenient to use.
Drawings
Fig. 1 is a functional block diagram of the present invention.
Fig. 2 is a schematic diagram of the circuit principle of the voltage sampling circuit of the present invention.
Fig. 3 is a schematic diagram of the circuit principle of the current sampling circuit of the present invention.
Fig. 4 is a schematic circuit diagram of the AD conversion circuit of the present invention.
Fig. 5 is a schematic circuit diagram of the PWM driving module according to the present invention.
Fig. 6 is the circuit schematic diagram of the transformer module, the change-over switch module, the damping resistor module and the capacitor module of the present invention.
Fig. 7 is a schematic diagram of the connection of the present invention during the experiment.
Detailed Description
Fig. 1 shows a functional block diagram of the present invention: the utility model provides an arc suppression coil off-line simulation debugging device, which comprises a power module, a rectifier module, a switch tube module, a transformer module, a change-over switch module, a damping resistance module, a capacitance module, an output sampling module, a controller module and a PWM driving module; the rectifier module, the switch tube module and the transformer module are sequentially connected in series; the output end of the transformer module is simultaneously connected with the change-over switch module, the damping resistor module and the capacitor module; the output sampling module, the change-over switch module and the PWM driving module are all connected with the controller module; the output end of the PWM driving module is connected with the switching tube module; the power module supplies power to the arc suppression coil offline simulation debugging device; an externally input power supply is rectified into direct current through the rectifying module, then voltage conversion is carried out through the switching tube module, and the direct current is transmitted to the damping resistance module and the capacitor module through the transformer module; the switch module is used for switching the connection relation between the damping resistance module and the capacitance module; the output sampling module is used for sampling voltage and current signals output by the debugging device and uploading the voltage and current signals to the controller module; the controller module is used for driving the change-over switch module to work and outputting a PWM control signal to the PWM driving module according to the uploaded output voltage and output current signals; the PWM driving module is used for generating a switching tube driving signal to drive the switching tube module to work.
The output sampling module comprises a voltage sampling circuit, a current sampling circuit and an AD conversion circuit; the voltage sampling circuit is used for sampling an output voltage signal and uploading the output voltage signal to the AD conversion circuit; the current sampling circuit is used for sampling an output current signal and uploading the output current signal to the AD conversion circuit; the AD conversion circuit is used for converting the uploaded analog quantity voltage sampling signal and the analog quantity current sampling signal into a digital signal and then uploading the digital signal to the controller module.
Fig. 2 shows a schematic diagram of a circuit principle of the voltage sampling circuit of the present invention: JP8 is an input terminal for voltage sampling, wherein the voltage signal inputted is divided by resistors R229 to R232, and the divided voltage is protected by a diode D3, then, after filtering through a capacitor C216, the input signal is input to the input anode of the isolation amplifier chip AMC1200, the input cathode of the chip is directly grounded, pins 1 and 8 of the chip are both directly connected with respective power signals, meanwhile, pins 4 and 5 of the chip are directly grounded, pins 6 and 7 of the chip are used as differential signal output ends to output amplified differential signals, then amplified by an operational amplifier circuit composed of the LF412 (indicated by U12B in the figure), amplified again by an amplification circuit composed of the operational amplifier LF412 (indicated by A1A in the figure), and then the voltage following and the load capacity amplification are carried out through a bipolar voltage follower (marked by A2A and A3A) formed by LF412, and a final voltage sampling signal _ bb is output.
Fig. 3 shows a schematic circuit diagram of the current sampling circuit of the present invention: after a current signal sampled by the current transformer is sampled and converted into a voltage signal through an operational amplifier LF412 and an amplifying circuit consisting of an operational amplifier LF412, a resistor R227, a resistor R228 and a capacitor C208, integrated through an integrating circuit (consisting of the operational amplifier LF412(A1B), the resistor R227, the resistor R228 and the capacitor C208), filtered through a two-pole RC filter circuit (R223 and C209 are first stages, and R224 and C210 are second stages), subjected to voltage following and isolation through an in-phase voltage follower, subjected to signal amplification through an amplifying circuit LF353 (comprising resistors R225, R226 and a capacitor C211), and then a final voltage sampling signal _ yy is output.
Fig. 4 shows a schematic circuit diagram of the AD conversion circuit of the present invention: the AD conversion circuit is a circuit formed by an AD conversion chip with the model number of AD7865 AS; the pin 36 of the chip is connected with a 3.3V power supply signal, and the pin 1 of the chip is connected with an AD _ BUSY signal output by the controller module; a pin 3 of the chip is connected with a CONVST signal output by the controller module; the 4-6 pins of the chip are also connected with AD control signals (AD _ CS, AD _ RD and AD _ WR) output by the controller module; pins 27-34 and pins 38-43 of the chip are used as digital signal output pins to output 14 paths of digital signals to the controller module; the pins 37 and 7-10 of the chip are directly grounded; pins 11 and 12 of the chip are connected with a VCC signal; pins 12, 17, 23 and 26 of the chip are also directly grounded, and pin 24 of the western chip is grounded through a filter capacitor C105; taking 13-16 pins of the chip as analog quantity input pins, and connecting the pins with a voltage sampling signal _ bb; pins 18-21 of the chip are used as analog quantity input pins and are connected with a current sampling signal _ yy; the 35 pins of the chip are directly connected with a power supply signal VCC, and the 25 pins of the chip are connected with the power supply signal VCC through a series of filter circuits (capacitors C102-104 and an inductor 6).
Fig. 5 is a schematic diagram of the circuit principle of the PWM driving module of the present invention: the PWM driving module is a circuit formed by a PWM driving chip with the model number of IGCM20F60 GA; in this embodiment, the switch tube module is a full-bridge switch module composed of 4 sets of IGBTs; three groups of capacitors C15-C17 are connected between the pin 1 and the pin 2 of the driving chip in parallel; three groups of capacitors C18-C20 are connected between the 3 pins and the 4 pins of the chip in parallel; capacitors C21-C23 are connected between the 5 pins and the 6 pins of the chip in parallel; the pins 7, 8, 10 and 11 of the chip output the driven PWM signals (PWM-AH, PWM-BH, PWM-AL and PWM-BL respectively), and the PWM signals are output to the control ends of the four groups of switching tubes after passing through respective RC filter circuits; the 13 pins of the chip are directly connected with a +15V power supply signal and are grounded through a protection diode D13 and filter capacitors C10 and C11; after the 14 pins of the chip are filtered by the RC filter circuits R11 and C8, FAULT signals of the controller module are connected and the FAULT state of the PWM driving chip is reported, and simultaneously the pins are also connected with signal _ temp signals of the controller module through the RC filter circuits (R10 and C9); the pin 15 of the chip is grounded and filtered through a filter capacitor C13, and is also connected with a PWM signal _1 output by the controller module through a resistance voltage division circuit; meanwhile, after passing through a filter circuit, a signal _ I signal is sampled through a resistor R15 and then is connected with pins 17-19 of a driving chip for overcurrent protection of the chip; pins 21 and 22 of the driving chip are connected with an external 220V alternating current power supply signal, and simultaneously, pin 23 is directly connected with a power supply signal _ HV for overvoltage protection.
As shown in fig. 6, the circuit principle of the transformer module, the switch module, the damping resistor module and the capacitor module of the present invention is as follows:
The transformer module comprises a first transformer and a second transformer, the input ends of the first transformer and the second transformer are connected in parallel and then connected with the output end of the switch tube module, and the output ends of the first transformer and the second transformer are connected with the change-over switch module; the change-over switch module comprises three groups of relays; the control coil of the first relay is connected with the controller module, the contacts of the first relay comprise a first relay first contact and a first relay second contact, the first relay first contact comprises a first relay first contact common end, a first relay first normally closed contact and a first relay first normally open contact, the first relay second contact comprises a first relay second contact common end, the first relay second normally closed contact and the first relay second normally open contact are connected, the common end of the first relay first contact is connected with the output common end of the first transformer, the first relay first normally closed contact is connected with the output common end of the second transformer, the common end of the first relay second contact is connected with the output anode of the second transformer, the first relay second normally closed contact is connected with the output anode of the first transformer, and the first relay first normally open contact is connected with the first relay second normally open contact; the control coil of the second relay is connected with the controller module, the contacts of the second relay comprise a first contact of the second relay and a second contact of the second relay, the first contact of the second relay comprises a common end of the first contact of the second relay, a first normally closed contact of the second relay and a first normally open contact of the second relay, the second contact of the second relay comprises a common end of the second contact of the second relay, a second normally closed contact of the second relay and a second normally open contact of the second relay, the common end of the first contact of the second relay is connected with the output anode of the first transformer, the first normally closed contact of the second relay is simultaneously connected with the capacitor module and the common end of the second contact of the third relay, the first normally open contact of the second relay is connected with the damping resistor module, the common end of the second contact of the second relay is a voltage measurement anode, and the second normally closed contact of the second relay is an output end, a second normally open contact of the second relay is connected with the output anode of the first transformer; a control coil of a third relay is connected with the controller module, contacts of the third relay comprise a first third relay contact and a second third relay contact, the first third relay contact comprises a first third relay contact common end, a first third relay normally closed contact and a first third relay normally open contact, the second third relay contact comprises a second third relay contact common end, a second third relay normally closed contact and a second third relay normally open contact, the first third relay contact is completely suspended, the second third relay contact common end is connected with the first third relay normally closed contact, the second third relay normally closed contact is suspended, and the second third relay normally open contact is connected with the capacitor module; the capacitor module comprises a first capacitor and a second capacitor, one end of the first capacitor is connected with a first normally closed contact of the second relay, and the other end of the first capacitor is simultaneously connected with the other end of the second capacitor, the other end of the damping resistor module and a second normally closed contact of the second relay; one end of the second capacitor is connected with a second normally open contact of the third relay; one end of the damping resistance module is connected with a first normally open contact of the second relay.
When the first relay and the second relay are powered off and the third relay is powered on, the arc suppression coil off-line simulation debugging device is used for carrying out a resonance test; when the first relay, the second relay and the third relay are all electrified, the arc suppression coil off-line simulation debugging device is used for carrying out thyristor action tests; when a resonance test is carried out, the output end of the arc suppression coil off-line simulation debugging device is connected to the high-voltage end of the arc suppression coil; when the thyristor operation test is performed, the output end of the arc suppression coil off-line simulation debugging device is connected to the a pole of the thyristor, and the damping resistor needs to be disconnected from the connecting line at one end of the thyristor (as shown in fig. 7).

Claims (10)

1. An arc suppression coil off-line simulation debugging device is characterized by comprising a power supply module, a rectification module, a switch tube module, a transformer module, a change-over switch module, a damping resistance module, a capacitance module, an output sampling module, a controller module and a PWM (pulse width modulation) driving module; the rectifier module, the switch tube module and the transformer module are sequentially connected in series; the output end of the transformer module is simultaneously connected with the change-over switch module, the damping resistor module and the capacitor module; the output sampling module, the change-over switch module and the PWM driving module are all connected with the controller module; the output end of the PWM driving module is connected with the switching tube module; the power module supplies power to the arc suppression coil offline simulation debugging device; an externally input power supply is rectified into direct current through the rectifying module, then voltage conversion is carried out through the switching tube module, and the direct current is transmitted to the damping resistance module and the capacitor module through the transformer module; the switch module is used for switching the connection relation between the damping resistance module and the capacitance module; the output sampling module is used for sampling voltage and current signals output by the debugging device and uploading the voltage and current signals to the controller module; the controller module is used for driving the change-over switch module to work and outputting a PWM control signal to the PWM driving module according to the uploaded output voltage and output current signals; the PWM driving module is used for generating a switching tube driving signal to drive the switching tube module to work.
2. The offline arc suppression coil simulation debugging device according to claim 1, wherein the switch tube module is a full-bridge switch module composed of 4 groups of IGBTs.
3. The offline simulation debugging device for the arc suppression coil according to claim 1 or 2, wherein the output sampling module comprises a voltage sampling circuit, a current sampling circuit and an AD conversion circuit; the voltage sampling circuit is used for sampling an output voltage signal and uploading the output voltage signal to the AD conversion circuit; the current sampling circuit is used for sampling an output current signal and uploading the output current signal to the AD conversion circuit; the AD conversion circuit is used for converting the uploaded analog quantity voltage sampling signal and the analog quantity current sampling signal into a digital signal and then uploading the digital signal to the controller module.
4. the offline simulation debugging device for arc suppression coils as claimed in claim 3, wherein said AD conversion circuit is a circuit composed of an AD conversion chip with model number AD7865 AS.
5. The offline simulation debugging device for the arc suppression coil according to claim 1 or 2, wherein the controller module is a circuit formed by an ARM chip of the type STM32F 103.
6. The offline arc suppression coil simulation debugging device according to claim 1 or 2, wherein the PWM driving module is a circuit formed by a PWM driving chip of model IGCM20F60 GA.
7. An off-line simulation debugging device for an arc suppression coil according to claim 1 or 2, wherein the transformer module comprises a first transformer and a second transformer, input ends of the first transformer and the second transformer are connected in parallel and then connected with output ends of the switch tube module, and output ends of the first transformer and the second transformer are connected with the change-over switch module.
8. The offline simulation debugging device for the arc suppression coil according to claim 7, wherein the change-over switch module comprises three sets of relays; the control coil of the first relay is connected with the controller module, the contacts of the first relay comprise a first relay first contact and a first relay second contact, the first relay first contact comprises a first relay first contact common end, a first relay first normally closed contact and a first relay first normally open contact, the first relay second contact comprises a first relay second contact common end, the first relay second normally closed contact and the first relay second normally open contact are connected, the common end of the first relay first contact is connected with the output common end of the first transformer, the first relay first normally closed contact is connected with the output common end of the second transformer, the common end of the first relay second contact is connected with the output anode of the second transformer, the first relay second normally closed contact is connected with the output anode of the first transformer, and the first relay first normally open contact is connected with the first relay second normally open contact; the control coil of the second relay is connected with the controller module, the contacts of the second relay comprise a first contact of the second relay and a second contact of the second relay, the first contact of the second relay comprises a common end of the first contact of the second relay, a first normally closed contact of the second relay and a first normally open contact of the second relay, the second contact of the second relay comprises a common end of the second contact of the second relay, a second normally closed contact of the second relay and a second normally open contact of the second relay, the common end of the first contact of the second relay is connected with the output anode of the first transformer, the first normally closed contact of the second relay is simultaneously connected with the capacitor module and the common end of the second contact of the third relay, the first normally open contact of the second relay is connected with the damping resistor module, the common end of the second contact of the second relay is a voltage measurement anode, and the second normally closed contact of the second relay is an output end, a second normally open contact of the second relay is connected with the output anode of the first transformer; the control coil of third relay connects controller module, the contact of third relay includes third relay first contact and third relay second contact, third relay first contact includes third relay first contact common port, the first normally closed contact of third relay and the first normally open contact of third relay, third relay second contact includes third relay second contact common port, third relay second normally closed contact and third relay second normally open contact, third relay first contact is whole unsettled, the first normally closed contact of second relay is connected to third relay second contact common port, third relay second normally closed contact is unsettled, third relay second normally open contact connects the electric capacity module.
9. An arc suppression coil offline simulation debugging device according to claim 8, wherein the capacitor module comprises a first capacitor and a second capacitor, one end of the first capacitor is connected with the first normally closed contact of the second relay, and the other end of the first capacitor is simultaneously connected with the other end of the second capacitor, the other end of the damping resistor module and the second normally closed contact of the second relay; one end of the second capacitor is connected with a second normally open contact of the third relay; one end of the damping resistance module is connected with a first normally open contact of the second relay.
10. The offline arc suppression coil simulation debugging device according to claim 9, wherein when the first relay and the second relay are powered off and the third relay is powered on, the offline arc suppression coil simulation debugging device is used for performing a resonance test; when the first relay, the second relay and the third relay are all electrified, the arc suppression coil off-line simulation debugging device is used for carrying out thyristor action tests; when a resonance test is carried out, the output end of the arc suppression coil off-line simulation debugging device is connected to the high-voltage end of the arc suppression coil; when the thyristor action test is carried out, the output end of the arc suppression coil off-line simulation debugging device is connected to the A pole of the thyristor, and the connecting line between the damping resistor and one end of the thyristor needs to be disconnected.
CN201920356621.1U 2019-03-20 2019-03-20 Offline simulation debugging device for arc suppression coil Active CN209746083U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113341244A (en) * 2021-05-24 2021-09-03 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and testing method
CN113341246A (en) * 2021-05-24 2021-09-03 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and method based on capacitance calibration

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113341244A (en) * 2021-05-24 2021-09-03 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and testing method
CN113341246A (en) * 2021-05-24 2021-09-03 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and method based on capacitance calibration
CN113341244B (en) * 2021-05-24 2022-06-17 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and testing method
CN113341246B (en) * 2021-05-24 2024-02-06 国网陕西省电力公司西安供电公司 Arc suppression coil testing device and method based on capacitance calibration

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