CN208283511U - Portable high-pressure direct current transportation blocks tester online - Google Patents
Portable high-pressure direct current transportation blocks tester online Download PDFInfo
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- CN208283511U CN208283511U CN201820906160.6U CN201820906160U CN208283511U CN 208283511 U CN208283511 U CN 208283511U CN 201820906160 U CN201820906160 U CN 201820906160U CN 208283511 U CN208283511 U CN 208283511U
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Abstract
The utility model relates to portable high-pressure direct current transportation to block tester online, including main circuit part and control circuit part, electric power incoming line and Phase sequence detection unit, electronic pressure regulating system, boosting exchange system, high-voltage rectifying filter unit and High voltage output unit constitute main circuit part；ARM core control system, isolation waveform processing module, high pressure attenuation units, touch control human-computer interaction interface and USB flash disk storage element constitute control circuit part, the utility model carries out human-computer interaction setting using touch LCD screen and shows data, arm processor controls automatic Regulation unit, and Self-pressurizing agri simultaneously completes forward and reverse switching.High voltage direct current staircase waveform is exported, for the online blocking characteristics test of high-voltage convertor station photo thyristor or independent transistor blocking characteristic and BOD characteristic test.Operating voltage reaches 8.5kV, and voltage output is stable and without high-frequency noise.The utility model has application to the on-line testing of HVDC converter substation scene, works well.
Description
Technical field
The utility model is applied to high-voltage convertor station photo thyristor component blocking characteristics Real time auto measure and light-operated crystalline substance
Brake tube BOD characteristic is tested automatically, while can also take into account automatically controlled thyristor cell part blocking characteristics test.
Background technique
It is Primary Component in high-voltage dc transmission electrical domain thyristor, the component being made of thyristor rises in high-voltage convertor station
Important function, need periodically to block performance to detect its high pressure, but being capable of Real time auto measure currently without one kind
The high-tension apparatus of its blocking characteristics, due to being often positioned in tens meters of high high-altitudes after the installation of high pressure valve module, personnel tested in the past
All be using remove thyristor around capacitance-resistance circuit, manually pressurization and manually recorded all test datas.Using this
Kind method has following drawback:
1) data of every test are different establishes a capital very accurately, and manual pressure has that consistency is bad, and due to
Need component count to be tested huge, repeated work intensity is big and low efficiency.
2) on-line testing is since there are due to resistance-capacitance absorption circuit, previous half-sinusoid method test leakage current is often non-
Chang great, leads to that plant capacity is big, the big inconvenient execute-in-place of weight.
3) previous equipment does not have data automatic recording function.It generally requires more people while carrying out, and in recording process
In there are human factors to be very easy to cause data record chaotic.
Utility model content
It is applied to the direct current transportation of high-voltage convertor station portable high-pressure the purpose of the utility model is to provide one kind to block online
Tester.
The technical solution of the utility model is: a kind of portable high-pressure direct current transportation blocks tester online, including
Main circuit part and control circuit part, electric power incoming line and Phase sequence detection unit (1), electronic pressure regulating system (2), boosting rectification are changed
Main circuit part is constituted to system (3), high-voltage rectifying filter unit (4) and High voltage output unit (5)；ARM core control system
(7), isolation waveform processing module (8), high pressure attenuation units (9), touch control human-computer interaction interface (10) and USB flash disk storage element
(11) control circuit part, electric power incoming line and Phase sequence detection unit (1) are constituted and is connected to ARM core by electronic pressure regulating system (2)
Heart control system (7), electronic pressure regulating system (2) is simultaneously by boosting exchange system (3) and high-voltage rectifying filter unit (4) connection
The output of high voltage direct current staircase waveform is carried out to high pressure output unit (5), high-voltage rectifying filter unit (4) is also decayed by high pressure simultaneously
Unit (9), isolation waveform processing module (8) are connected to ARM core control system (7), and ARM core control system (7) connects simultaneously
Touch control human-computer interaction interface (10) and USB flash disk storage element (11) are connect, the system (3), hv filtering unit of commutating of boosting
(4), High voltage output unit (5) setting is in high_voltage isolation storehouse (6).
Electronic pressure regulating system (2) is by integrated circuit (IC14) and linear isolation optocoupler (IC13) and electronic pressure controller (ZT2)
It constitutes, linear adjustable D/A staircase waveform, integrated circuit (IC14) and linear isolation is generated by ARM core control system (7) D/A
The 220V sine wave inputted is become 0~220V linearly adjustable sine by optocoupler (IC13) connection access electronic pressure controller (ZT2)
Wave constitutes the electronic pressure regulating system of D/A Linear Control.
Isolation waveform processing module (8) includes that high_voltage isolation sensor, amplifier (IC3) and No-contact switch commutation are single
Member, high_voltage isolation sensor are made of voltage sensor (T1) and current sensor (T2), and No-contact switch commutation is by integrated electricity
Road (IC5, IC4, IC2A, IC2B, IC12, IC11, IC8A, IC8B) is constituted, the voltage sensor (T1) of high_voltage isolation sensor
The integrated circuit (IC5, IC4) of No-contact switch reversing unit, ARM core system (7) connection collection are connected by amplifier (IC3)
Forward and reverse commutation switching is carried out at circuit (IC2A and IC2B), current sensor (T2) connection of high_voltage isolation sensor is contactless
Switch the integrated circuit (IC12, IC11) of reversing unit, ARM core system (7) connects integrated circuit (IC8A, IC8B) and carries out just
Reversed commutation switching.
High-pressure chamber (6) is isolated with low pressure storehouse (12) by high voltage insulating materials layer (14), is declined in high-pressure chamber (6) equipped with high pressure
The high pressure damping resistance (9) for subtracting unit is equipped with high pressure polytetrafluoro between high voltage insulating materials layer (14) and high pressure damping resistance (9)
Cushion block (15), high pressure damping resistance (9) pass through high pressure polytetrafluoro cushion block (15) and high voltage insulating materials layer (14) even by bolt
The sample resistance (13) for being connected to low pressure storehouse (12) is sampled, and equipment high pressure is finally exported by high voltage output terminal (16) to tested
Device.
The utility model carries out human-computer interaction setting using touch LCD screen and shows data, and arm processor control is automatic
Pressure regulation unit, Self-pressurizing agri simultaneously complete forward and reverse switching.High voltage direct current staircase waveform is exported, high-voltage convertor station photo thyristor is used for
Online blocking characteristics test or independent transistor blocking characteristic and BOD characteristic test.Operating voltage reaches 8.5kV, voltage output
Stablize and without high-frequency noise.This equipment has application to the on-line testing of HVDC converter substation scene at present, works well.
Detailed description of the invention:
Attached drawing 1 is the principles of the present invention block diagram.
Attached drawing 2 is the circuit diagram of the utility model.
Attached drawing 3 is the high_voltage isolation chamber structure schematic diagram of the utility model.
Attached drawing 4 is the isolation waveform processing module circuit diagram of the utility model.
Attached drawing 5 is the human-computer interaction interface power detecting prompting interface schematic diagram of the utility model.
Attached drawing 6 is the human-computer interaction main interface schematic diagram of the utility model.
Attached drawing 7 is the charting interface schematic diagram of the utility model.
Specific embodiment:
A kind of portable high-pressure direct current transportation blocks tester online, mainly includes main circuit part and control circuit portion
Point: electric power incoming line and Phase sequence detection unit 1, electronic pressure regulating system 2, boost system 3, hv filtering unit 4 and the height of commutating
Output unit 5 is pressed to constitute main circuit part；ARM core control system 7, isolation waveform processing module 8, high pressure attenuation units 9, touching
It touches control human-computer interaction interface 10 and USB flash disk storage element 11 constitutes control circuit part.Electric power incoming line and Phase sequence detection unit 1 pass through
It crosses electronic pressure regulating system 2 and is connected to ARM core control system 7, electronic pressure regulating system 2 commutates system 3 by boosting simultaneously
High voltage output unit 5, which is connected to, with high-voltage rectifying filter unit 4 carries out the output of high voltage direct current staircase waveform.High-voltage rectifying filter unit
4 are transmitted to ARM core control system by the value after high pressure attenuation units 9, isolation waveform processing module 8 decay high pressure
7, ARM core control systems 7 connect touch control human-computer interaction interface 10 and USB flash disk storage element 11 simultaneously.Boosting commutates
System 3, hv filtering unit 4, High voltage output unit 5 are arranged in high_voltage isolation storehouse 6.
It is as follows that utility model works principle is illustrated according to attached drawing 2:
Electric power incoming line and Phase sequence detection unit 1 are made of power switch S1 and Phase sequence detection plate VAP2, and equipment presses S1 electricity
After source switch, electric power incoming line phase sequence is detected by electric power incoming line and Phase sequence detection unit 1, passes through PC0, PC1, PC2 tri-
Whether result is sent to ARM core control system 7 by root I/O signal wire, judge normal into electric phase sequence, passes through touch Ru abnormal
Control human-computer interaction interface 10 is prompted.G1 in figure, G2 are respectively the Switching Power Supply of 24V and 5V, and G3 is model LH20-
The 220V of 10A12 turns the power module of ± 12V.Element number, test voltage, polarity of voltage side are completed on touch LCD screen
To the setting of, residual current protection value parameter, as shown in fig. 6, ARM core control system 7 passes through serial ports RX, TX signal-obtaining liquid crystal display
Upper all setup parameters.Isolation waveform processing module 8 is sent to by PA4 (D/A signal) according to voltage to be loaded, is isolated
Waveform processing module 8 includes high_voltage isolation sensor, amplifier IC3 and No-contact switch reversing unit, high_voltage isolation sensor
Be made of voltage sensor T1 and current sensor T2, No-contact switch commutation by Integrated circuit IC 5, IC4, IC2A, IC2B,
IC12, IC11, IC8A, IC8B are constituted, and the voltage sensor T1 of high_voltage isolation sensor is cut by the way that amplifier IC3 connection is contactless
Integrated circuit IC 5, the IC4 of reversing unit are changed, ARM core system 7 connects Integrated circuit IC 2A and IC2B and carries out forward and reverse commutation
Switching, the Integrated circuit IC 12 of the current sensor T2 connection No-contact switch reversing unit of high_voltage isolation sensor, IC11,
ARM core system 7 connects Integrated circuit IC 8A, IC8B and carries out forward and reverse commutation switching.Electronic pressure regulating system 2 is by integrated circuit
IC14 and linear isolation optocoupler IC13 is constituted, and Integrated circuit IC 14 is connect with linear isolation optocoupler IC13.In isolation waveform processing
Signal is amplified by IC14 after signal is isolated by IC13 linear optical coupling in module, by A01, A02 two
Shielding line send signal to electronic pressure regulating system 2, and the signal that electronic pressure regulating system 2 comes according to transmission is by the 220V voltage of input turn
It is changed to the voltage of 0~220V linear variable.Exchange system 3 of boosting is controlled by high-tension transformer ZT2, high voltage silicon rectifier stack VD1~VD4, TTL
Signal relay plate VAP1 processed, this 4 parts high-voltage relay ZK1A~ZK4A form.Passed through by ARM core control system 7
Two I/O signals of PB6, PB7 remove the K1 in control TLL relay driving plate VAP1, two low-voltage relays of K2.And K1, K2
The line packet for controlling four high-voltage relay ZK1A~ZK4A completes the control forward and reverse to high pressure by the control to K1, K2,
Being attracted ZK1A, ZK2A is positive test, and ZK3A, ZK4A are negative testing.The electricity for 0~220V linear variable that system carrys out prime
Pressure boost to input voltage and carries out full-bridge rectification by VD1~VD4 high voltage silicon rectifier stack by boosting exchange system 3, will be high
Corrugating becomes exchanging all-wave, and it is positive, reversed, positive and negative that the measurement direction progress that area is arranged is arranged according to liquid crystal display man-machine interface 10
It is tested to automatic switchover.High-voltage rectifying filter unit 4 is made of high-tension resistive HZR1 and high-voltage filtering capacitor C1, high-tension resistive
HZR1 connects with C1, and HZR1, which carries out current limliting to C1 charging, prevents capacitance charging current excessive.By boosting exchange system 3 transmit Lai
High-pressure pulsating direct current is become DC waveform by the capacitor C1 in high-voltage rectifying filter unit 4 by high-pressure pulsating direct current.High pressure is defeated
Unit 5 is made of high-voltage and current-limitation resistance HZR2 out, and being connected on main function in circuit is when the measured device of output connection is short
Limitation to electric current is completed when road, protects the high-voltage relay contact of front end not adhesion.The direct current of hv filtering passes through
High voltage output unit 5 is connected to measured device and is tested.High pressure attenuation units 9 are by high pressure damping resistance HRZ4 and sample resistance
ZR1 is in series, and main function is to decay to high pressure within 3.3V.High pressure attenuation units 9 will decaying after carrying out high pressure decaying
Voltage value afterwards feeds back to that isolation waveform processing module 8 amplifies the voltage, the electric current that sample and direction hand-off process is sent
Be read out feedback to ARM core control system 7 processor PA0, PA2 (A/D) mouth, and by ARM control system 7 decide whether after
It is continuous to be pressurized with the processing of the system modes such as no-current protection and BOD.ARM core control system 7 will be set after having handled related interrupts
Standby test result is by serial ports RX, TX oral instructions to touch control human-computer interaction interface 10, while by temperature and humidity when testing, test
The contents such as time are recorded in data record table together, as shown in fig. 7, by D+ after completing this operation, D- mouthfuls of synchronizations are by data
In write-in to USB flash disk storage element 11.After detecting output voltage safety, indicating lamp for safe becomes green, Ke Yigeng from red
Next component is changed to be tested.The equipment can satisfy voltage 8.5kV on valve body, leakage current 25mA module testing below.
Each unit technical characterstic is as follows:
1) electric power incoming line and Phase sequence detection unit 1: the built-in electric power incoming line Phase sequence detection unit 1 of this equipment passes signal
Send to ARM core control system 7 for judge inlet wire whether phase sequence mistake, increase equipment and operator safety.
2) electronic pressure regulating system 2:ARM core processor system 7 passes through the autoelectrinic that isolation waveform processing module 8 controls
2 pressure regulation of voltage-regulating system exports the adjustable exchange 0~220V voltage of high-precision linear.
3) boosting commutates system 3: high voltage step-up system is exported electronic pressure regulating system 2 by high-tension transformer
Voltage carries out boosting full-bridge rectification.And High voltage output is switched over, realize the purpose of forward and reverse output high pressure.
4) hv filtering unit 4: waveform is become DC waveform using high-voltage capacitance by high-voltage rectifying filter unit 4, is used
Direct current method detects transistor blocking characteristic.
5) High voltage output unit 5: for exporting high voltage direct current staircase waveform, while whether detection output meets safe electricity
Pressure, cooperation ARM core control system 7 detect and by touch control human-computer interaction interface to photo thyristor BOD characteristic
10 displays.
6) high_voltage isolation storehouse 6: this equipment uses high and low voltage isolation chamber structure, and high voltage unit is individually placed at equipment high pressure
Area increases the security reliability of equipment, as shown in figure 3, high_voltage isolation storehouse 6 and low pressure storehouse 12 pass through high voltage insulating materials layer 14
It is isolated.The high pressure damping resistance 9 of high pressure attenuation units is equipped in high-pressure chamber 6, low side is connected to taking positioned at low pressure storehouse
The upper end of sample resistance 13, sample resistance both ends are all low pressure.Height is equipped between high voltage insulating materials layer 14 and high pressure damping resistance 9
Polytetrafluoro cushion block 15 is pressed, high pressure damping resistance 9 passes through high pressure polytetrafluoro cushion block 15 by bolt and high voltage insulating materials layer 14 connects
The sample resistance 13 for being connected to low pressure storehouse 12 is sampled.Guarantee penetrate on the screw in low pressure storehouse all without high pressure.It is detailed in attached drawing
6。
7) ARM core control system 7: the module, which uses, has ARM CortexTMAt the STM32F407ZGT6 of-M4F kernel
It manages device and carries out core control, ARM core controller carries out control generation record file to USB flash disk simultaneously and later data is facilitated to analyze.
8) isolation waveform processing module 8: isolation waveform processing module 8 includes high_voltage isolation sensor, amplifier IC3 and nothing
Contact change-over reversing unit, high_voltage isolation sensor are made of voltage sensor T1 and current sensor T2, and No-contact switch changes
It is constituted to by Integrated circuit IC 5, IC4, IC2A, IC2B, IC12, IC11, IC8A, IC8B, the voltage of high_voltage isolation sensor passes
Sensor T1 passes through the Integrated circuit IC 5 of amplifier IC3 connection No-contact switch reversing unit, IC4, the connection collection of ARM core system 7
Forward and reverse commutation switching is carried out at IC circuit 2A and IC2B, current sensor (T2) connection of high_voltage isolation sensor is contactless to cut
Integrated circuit IC 12, the IC11 of reversing unit are changed, ARM core system 7 connects Integrated circuit IC 8A, IC8B and carries out forward and reverse commutation
Switching.Voltage after decaying is amplified by T1 voltage sensor isolated transmission to IC3 (AD620) amplifier, and passes through IC5
(LM741) and by ARM core system by PB4 mouthfuls the conducting of IC2-A (DG201) analogue quantity switch is set low, complete pair signals carry out anti-
To switching, if ARM core system sets low PB3 mouthfuls, signal passes through IC5 (LM741), IC4 (LM741), IC2-B
(DG201) the positive switching of signal progress is sent to PA0 (A/D) mouth and is sampled, and realizes the stepping test of non-relay structure
System.The similarly reversed letter that current signal is made up of T2 current sensor isolated transmission to IC12, IC8-A (PB4 mouthfuls set low)
Number access, IC12, IC11, the forward signal access that IC8-B (PB3 mouthfuls set low) is constituted are sent to PA2 (A/D) mouth and are sampled.
The electronic pressure regulating system 2 being made of IC13 (ISO124) linear isolation optocoupler and IC14LM741 controls analog signal to electronics tune
Depressor is controlled, and attached drawing 4 is detailed in.
9) high pressure attenuation units 9: decaying is carried out to high pressure using high-tension resistive cooperation sample resistance, control unit is facilitated to adopt
Sample, the structure pass through the connection of high pressure resistant material layer by bolt and set low pressure storehouse sampling electricity using high-tension resistive is installed in high-pressure chamber
Resistance is sampled, and Keep Clear-High Voltage for isolation.
10) touch control human-computer interaction interface 10: it is man-machine that the part uses the progress of large scale Capacitive touch liquid crystal display
Following functions may be implemented in interaction, interface:
Automatically switch forward and reverse high voltage functionality.
Equipment component number may be implemented to add a function automatically, greatlies simplify and repeatedly inputs work.
It can recorde all parameters and testing time after testing every time with data record table.
Have environment temperature and humidity sampling functions, and is shown in liquid crystal display, while record form automatically records.Equipment
With output voltage detection function, there is green indicating lamp to protect for prompting equipment output voltage whether to be in safety low-pressure or less
Protect operator's personal safety.
11) USB flash disk storage element 11: the warehouse comprising a placing U disk can also be carried arbitrarily when for being inserted into USB flash disk and be set
Standby mobile, USB flash disk will not be dropped out because equipment is mobile, and personnel convenient to use plug USB flash disk.USB flash disk is written by ARM controller
The data of data, storage can be inquired directly on computers.
12) equipment is using high-intensitive portability cabinet installation, have one can portable dragging wheeled construction design.Simultaneously
Design has the storing bin that can store the attachmentes such as p-wire, power supply line.
Claims (4)
1. a kind of portable high-pressure direct current transportation blocks tester, including main circuit part and control circuit part, power supply online
Inlet wire and Phase sequence detection unit (1), electronic pressure regulating system (2), boosting exchange system (3), high-voltage rectifying filter unit (4) and height
Output unit (5) are pressed to constitute main circuit part；ARM core control system (7), isolation waveform processing module (8), high pressure decaying are single
First (9), touch control human-computer interaction interface (10) and USB flash disk storage element (11) constitute control circuit part, it is characterised in that: electricity
Source inlet wire and Phase sequence detection unit (1) pass through electronic pressure regulating system (2) and are connected to ARM core control system (7), electronic pressure regulating system
It is high that system (2) is connected to High voltage output unit (5) progress by boosting exchange system (3) and high-voltage rectifying filter unit (4) simultaneously
The output of straightening stream staircase waveform, high-voltage rectifying filter unit (4) also handle mould by high pressure attenuation units (9), isolation waveform simultaneously
Block (8) is connected to ARM core control system (7), and ARM core control system (7) connects touch control human-computer interaction interface simultaneously
(10) it is arranged with USB flash disk storage element (11), boosting exchange system (3), high-voltage rectifying filter unit (4), High voltage output unit (5)
In high_voltage isolation storehouse (6).
2. portable high-pressure direct current transportation according to claim 1 blocks tester online, it is characterised in that: electronic pressure regulating
System (2) is made of integrated circuit (IC14) and linear isolation optocoupler (IC13) and electronic pressure controller (ZT2), by ARM core control
System (7) D/A processed generates linear adjustable D/A staircase waveform, and integrated circuit (IC14) connect with linear isolation optocoupler (IC13) and connects
Entering electronic pressure controller (ZT2) becomes 0~220V linearly adjustable sine wave for the 220V sine wave inputted, and it is linear to constitute D/A
The electronic pressure regulating system of control.
3. portable high-pressure direct current transportation according to claim 1 blocks tester online, it is characterised in that: isolation waveform
Processing module (8) includes high_voltage isolation sensor, amplifier (IC3) and No-contact switch reversing unit, high_voltage isolation sensor
Be made of voltage sensor (T1) and current sensor (T2), No-contact switch commutation by integrated circuit (IC5, IC4, IC2A,
IC2B, IC12, IC11, IC8A, IC8B) it constitutes, the voltage sensor (T1) of high_voltage isolation sensor is connected by amplifier (IC3)
Connect the integrated circuit (IC5, IC4) of No-contact switch reversing unit, ARM core control system (7) connect integrated circuit (IC2A and
IC2B forward and reverse commutation switching) is carried out, the current sensor (T2) of high_voltage isolation sensor connects No-contact switch reversing unit
Integrated circuit (IC12, IC11), ARM core control system (7) connects integrated circuit (IC8A, IC8B) and carries out forward and reverse commutation
Switching.
4. portable high-pressure direct current transportation according to claim 1 blocks tester online, it is characterised in that: high_voltage isolation
Storehouse (6) is isolated with low pressure storehouse (12) by high voltage insulating materials layer (14), and high pressure attenuation units are equipped in high_voltage isolation storehouse (6)
(9) high pressure damping resistance is equipped with high pressure polytetrafluoro cushion block (15) between high voltage insulating materials layer (14) and high pressure damping resistance,
High pressure damping resistance passes through high pressure polytetrafluoro cushion block (15) by bolt and high voltage insulating materials layer (14) is connected to low pressure storehouse
(12) sample resistance (13) is sampled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820906160.6U CN208283511U (en) | 2018-06-12 | 2018-06-12 | Portable high-pressure direct current transportation blocks tester online |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820906160.6U CN208283511U (en) | 2018-06-12 | 2018-06-12 | Portable high-pressure direct current transportation blocks tester online |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208283511U true CN208283511U (en) | 2018-12-25 |
Family
ID=64699816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820906160.6U Active CN208283511U (en) | 2018-06-12 | 2018-06-12 | Portable high-pressure direct current transportation blocks tester online |
Country Status (1)
| Country | Link |
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| CN (1) | CN208283511U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907793A (en) * | 2019-11-29 | 2020-03-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Thyristor blocking characteristic test system and method |
| CN111371345A (en) * | 2019-10-08 | 2020-07-03 | 九江赛晶科技股份有限公司 | Current control method of thyristor rectifying device in special track motor |
| CN112415355A (en) * | 2020-11-03 | 2021-02-26 | 西安交通大学 | Method for evaluating blocking state of thyristor of high-voltage converter valve |
-
2018
- 2018-06-12 CN CN201820906160.6U patent/CN208283511U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371345A (en) * | 2019-10-08 | 2020-07-03 | 九江赛晶科技股份有限公司 | Current control method of thyristor rectifying device in special track motor |
| CN110907793A (en) * | 2019-11-29 | 2020-03-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Thyristor blocking characteristic test system and method |
| CN112415355A (en) * | 2020-11-03 | 2021-02-26 | 西安交通大学 | Method for evaluating blocking state of thyristor of high-voltage converter valve |
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