CN203164375U - Impulse testing apparatus of IGBT direct series valve - Google Patents

Impulse testing apparatus of IGBT direct series valve Download PDF

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Publication number
CN203164375U
CN203164375U CN 201320077992 CN201320077992U CN203164375U CN 203164375 U CN203164375 U CN 203164375U CN 201320077992 CN201320077992 CN 201320077992 CN 201320077992 U CN201320077992 U CN 201320077992U CN 203164375 U CN203164375 U CN 203164375U
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CN
China
Prior art keywords
igbt
valve
directly
test
impulse
Prior art date
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CN 201320077992
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Chinese (zh)
Inventor
陈永华
侯凯
李伟邦
范镇淇
卢文兵
董长城
武迪
Original Assignee
国网智能电网研究院
国家电网公司
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Priority to CN 201320077992 priority Critical patent/CN203164375U/en
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Publication of CN203164375U publication Critical patent/CN203164375U/en

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Abstract

The utility model provides a testing apparatus and especially relates to an impulse testing apparatus of an IGBT direct series valve. The apparatus comprises a testing loop and a charging loop including an alternating-current breaker, a voltage regulator, an isolation transformer, an uncontrolled rectification cabinet, a charging resistor, and a quick direct-current fuse; and the testing loop consists of a discharging loop, an impulse capacitor set, an IGBT direct series valve arm I, a IGBT direct series valve arm II, a resistance-inductance load, and a quick direct-current fuse. Compared with the prior art, the provided apparatus has the following beneficial effects: the demand at the initial stage of the research and development of a converter valve can be satisfied; voltage and current stresses are generated at the valve arms under the circumstances that the thermal design is not considered and thus the electrical performances of the valve arms can be verified; and only two valve arms are needed during the testing process and the manufacturing and parameter adjusting of the valve arms can be carried out conveniently.

Description

A kind of IGBT valve impulse test device of directly connecting
Technical field
The utility model relates to the test unit of a kind of flexible transmission and power electronics, specifically relates to directly the connect impulse test device of valve of a kind of IGBT.
Background technology
Along with progressively application flexibility direct current transportation of electric system (VSC-HVDC) technology, flexible AC transmission technology (FACTS) and customization electric power (CP) technology, become one of key factor that influences power system security as the reliability of high-power insulated gate bipolar transistor (IGBT) valve of core component.Because high-power insulated gate bipolar transistor (IGBT) valve is widely used in the electric circumstance of high voltage, big electric current, in the experimental enviroment of research and development and engineering, is difficult to make up the circuit identical with actual operating mode and carries out running test.Therefore, how in research and development and engineering test process, to make up the test unit of equivalence, carry out the test suitable with actual operating mode intensity and become the key of dealing with problems.
The IGBT converter valve of directly connecting can be widely used in flexible DC power transmission (VSC-HVDC), flexible AC transmission (FACTS) and customization electric power (CP) technical field.Usually, form the converter valve layer by an IGBT device and corresponding auxiliary circuit thereof earlier, be connected into the valve section by a plurality of valve layers again, this valve Duan Zaijing series connection is linked to be a complete valve, is used as a brachium pontis of transverter.The subject matter of the direct serial connection technology of IGBT is the unbalanced device failure that causes of voltage, cause that uneven reason of pressing is many, as: drive signal trickle inconsistent, the device self character is inconsistent etc., in addition, the distributed capacitance of electric loop, stray inductance and the device heat radiation inequality in operational process can cause that all the voltage of IGBT series connection is unbalanced.
According to relevant criterion, comprise at directly the connect running test content of converter valve of IGBT: maximum continuous service load test, maximum temporary transient overlond running test, minimum direct current voltage test, the IGBT excess current turn-offs test and short-circuit current is tested.Under various operating condition of test, investigate converter valve to the tolerance of critical stress such as maximum current, voltage and temperature, with directly the connect reliability of converter valve of checking IGBT.
Running test generally need make up the full power trial (FPT) environment, but this test loop is complicated, and very high for the requirements such as design of experiment power supply capacity, control system, especially for the higher series connection valve of electric pressure, these problems are more outstanding.Simultaneously, directly connect the converter valve research and development initial stage at IGBT, problem weave ins such as circuit, electromagnetic environment, heat, strong and weak electricity if only use the full power trial (FPT) environment, are unfavorable for complicated problems being decomposed and progressively solving one by one.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the utility model proposes a kind of at directly the connect improvement project of valve development test problem of IGBT; The IGBT that the utility model proposes converter valve pulse testing circuit of directly connecting under the situation of not considering thermal design, has been realized the voltage to the IGBT module, the examination of current electrical stress.With other test unit ratio, the excellent effect of this test unit is: circuit is simple, method is reliable, can verify test product valve, low to the designing requirement of experiment power supply and control system fast.Also be fit to very much the converter valve actual needs at research and development initial stage simultaneously, under the situation of not considering thermal design, produce voltage, current stress at the valve arm, only the electric property of valve arm is verified that only need two valve arms during test, the making of valve arm and parameter adjustment are all very convenient.
To achieve these goals, the utility model provides a kind of test unit, described circuit is the IGBT valve impulse test device of directly connecting, and its improvements are: described circuit comprise the test loop and by AC circuit breaker, pressure regulator, isolating transformer, do not control rectifier cabinet, charging resistor and the charge circuit formed of dc fuse I fast;
Described AC circuit breaker, pressure regulator, isolating transformer and do not control rectifier cabinet and connect successively, described AC circuit breaker inserts power supply; The impulse capacitor group high-pressure side of not controlling rectifier cabinet high-voltage output end and test loop of described charge circuit is connected; Do not control rectifier cabinet low-voltage output serial connection charge resistance and insert fast the low pressure end of described impulse capacitor group behind the dc fuse I successively.
Further, described test loop comprises discharge loop, impulse capacitor group, IGBT directly connect valve arm I, IGBT directly connect valve arm II, resistance sense load and dc fuse II fast; Directly the connect anode tap of valve arm I of the high-pressure side of described impulse capacitor group and IGBT is in series, the low pressure end of described impulse capacitor group connect with quick dc fuse II afterwards and to be connected in series mutually with directly the connect cathode terminal of valve arm II and the resistance terminal of resistance sense load of IGBT, parallel discharge loop, described impulse capacitor group two ends, the inductance end of described resistance sense load and IGBT directly the connect anode tap of valve arm II of the cathode terminal of valve arm I and IGBT of directly connecting is connected in series mutually.
Further, control protection main frame is connected with VBC, and described VBC and the IGBT grid of each IGBT of directly connecting among the valve arm I is connected respectively.
Further, described IGBT valve arm I and the IGBT valve arm II that directly connects that directly connects is test product valve.
Further, the described IGBT valve arm I that directly connects comprises the IGBT module I of several series connection, and described IGBT module I comprises IGBT and inverse parallel diode.
Further, the described IGBT valve arm II that directly connects comprises the IGBT module ii of several series connection, and described IGBT module ii comprises IGBT, inverse parallel diode and 15V power supply, and the both positive and negative polarity of described 15V power supply links to each other with grid with the emitter of IGBT respectively.
Further, described resistance sense load comprises a resistance and an inductance of connecting with it.
Further, described discharge loop comprises discharge current-limiting resistance and single-phase switch.
Further, described pressure regulator is the three-phase electric voltage regulator, and described isolating transformer is three-phase 380V/10kV isolating transformer, and described charging resistor is current-limiting charge resistance, and described impulse capacitor is the high density impulse capacitor.
Compare with existing test unit, the beneficial effect that the utility model reaches is:
1) circuit of test unit is simple, method is reliable, builds easily.
2) basic thought of test unit is to utilize less power supply that energy storage component is charged earlier, utilizes energy storage component to provide the excitation of certain voltage, levels of current for test unit then, and is low to the experiment power supply capacity requirement.
3) test unit is fit to the converter valve actual needs at research and development initial stage, only the electric property of valve arm is verified fast, only needs two valve arms during test, and the making of valve arm and parameter adjustment are all comparatively convenient.
4) test unit can obtain actual required voltage, current stress by regulating circuit parameter and driving control waveform, and not only regulative mode is simple, flexible, and has higher equivalence.
Description of drawings
Fig. 1 is directly the connect circuit theory diagrams of valve pulse testing platform of the utility model 10kV IGBT;
Fig. 2 is directly connect voltage, the current waveform figure of IGBT among the test product valve arm I of valve pulse testing platform of the utility model 10kV IGBT;
Reference numeral:
The 1-power supply; The 2-AC circuit breaker; 3-three-phase electric voltage regulator; 4-three-phase 380V/10kV isolating transformer; 5-is not controlled rectifier cabinet; 6-current-limiting charge resistance; The quick dc fuse I of 7-; The 8-discharge loop; 9-high density impulse capacitor group; The quick dc fuse II of 10-; The 11-IGBT valve arm I that directly connects; The 12-IGBT valve arm II that directly connects; 13-resistance sense load R and L; 14-control protection main frame.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail;
1, test unit
As shown in Figure 1, Fig. 1 is divided into charge circuit and test loop two parts for directly the connect circuit theory diagrams of valve pulse testing platform of 10kV IGBT.
(1) charge circuit comprises that AC circuit breaker 2, three-phase electric voltage regulator 3, three-phase 380V/10kV isolating transformer 4,14kV do not control rectifier cabinet 5, current-limiting charge resistance 6 and dc fuse I7 fast.An end of not controlling rectifier cabinet 5 low-voltage outputs and current-limiting charge resistance 6 is connected, the other end of current-limiting charge resistance 6 is connected with the end of quick dc fuse I7, and the other end of dc fuse I7 is connected with the low pressure end of test loop middle-high density impulse capacitor group 9 fast.
Dc fuse I7 is for the protection of semi-conductor electronic device in the charge circuit and relevant electrical equipment fast.
(2) test loop comprises discharge loop 8, high density impulse capacitor group 9, IGBT directly connect valve arm I11, IGBT directly connect valve arm II12, resistance sense load 13, dc fuse II10 fast.Parallel discharge loop, high density impulse capacitor group 9 two ends 8, the low pressure end of high density impulse capacitor group 9 is connected with the end of quick dc fuse II10, fast directly the connect cathode terminal of valve arm II12 of an end of the other end of dc fuse II10 and resistance sense load 13 and IGBT is connected, the other end of resistance sense load 13 and IGBT directly the connect anode tap of valve arm II12 of the cathode terminal of valve arm I11 and IGBT of directly connecting is connected, and directly the connect anode tap of valve arm I11 of IGBT is connected with the high-pressure side of high density impulse capacitor group 9.
Dc fuse II10 is for the protection of semi-conductor electronic device in the test loop and relevant electrical equipment fast.
IGBT valve arm I11 and the IGBT valve arm II12 that directly connects that directly connects is test product valve.Wherein IGBT directly connects valve arm I11 for the dynamic and static characteristic of all pressing of investigating each series IGBT, and IGBT directly connects, and valve arm II12 investigates and the influence of the antiparallel diode of IGBT and reversely restoring process thereof.The IGBT valve arm I11 that directly connects comprises the IGBT module I of several series connection, and the IGBT module I comprises IGBT(vge1-vgeN, and N is the nature coefficient) and inverse parallel diode (vce1-vceN, N are the nature coefficient); The IGBT valve arm II12 that directly connects comprises the IGBT module ii of several series connection, the IGBT module ii comprises IGBT(vge1-vgeN, N is the nature coefficient), inverse parallel diode (vce1-vceN, N is the nature coefficient) and the 15V power supply, the both positive and negative polarity of described 15V power supply links to each other with grid g with the emitter E of IGBT respectively.
The control protection main frame 14 that is in the safety zone is connected with VBC, and described VBC and IGBT directly connect, and the grid g of IGBT connects respectively among the valve arm I11.
2, test method
The test method of this test unit correspondence comprises the steps:
(1) preparatory stage: determine IGBT directly connect valve arm I11 and IGBT directly connect trial voltage stress, the current stress requirement of valve arm II12, adjust corresponding circuit parameter and determine to drive control waveform;
(2) preparatory stage: confirm that three-phase electric voltage regulator 3 makes zero, high density impulse capacitor group 9 terminal voltages are zero, and the IGBT valve arm I11 that directly connects is in the locking off state, and the coherent detection instrument correctly connects;
(3) to 9 chargings of high density impulse capacitor group: closed AC circuit breaker 2, be in the control desk of safety zone by adjusting, three-phase electric voltage regulator 3 output voltages are slowly risen, power to not controlling rectifier cabinet 5 by three-phase isolation transformer, to 9 chargings of high density impulse capacitor group, observe when high density impulse capacitor group 9 terminal voltages rise to required trial voltage and stop to regulate three-phase electric voltage regulator 3, then three-phase electric voltage regulator 3 output voltages are transferred to zero, disconnect AC circuit breaker 2.
(4) begin test: start control protection main frame to VBC(valve base opertaing device, be used for control IGBT) the output control signal, the driving control waveform that VBC directly connects and determines in all IGBT input step 1 among the valve arm I11 to IGBT;
(5) by using IGBT in the coherent detection observation of use instrument process of the test directly connect each IGBT and IGBT among the valve arm I11 directly connect transient voltage, the current waveform of inverse parallel diode among the valve arm II12, assess its dynamic and static performance of all pressing, investigate IGBT series connection valve tolerance to voltage, current stress under stable state, excess current shutoff and short circuit operating mode;
(6) finish test: stop control protection main frame earlier and export control signal to VBC, determine that the IGBT valve arm I11 that directly connects is in blocking, discharges high density impulse capacitor group 9 fully by discharge loop 8 then.
The IGBT valve pulse testing platform of directly connecting is intended to not consider apply voltage stress, current stress at the test product valve arm under the situation of thermal design.Regulate charge circuit and obtain testing required voltage, the parameter of load and the corresponding control waveform that drives obtain required current waveform in the regulating circuit.The voltage of IGBT in process of the test, current waveform figure are as shown in Figure 2 in the test product valve arm 1, Fig. 2 has three IGBT waveforms to overlap for the utility model 10kV IGBT directly connect voltage, the current waveform figure of IGBT in the test product valve arm 1 of valve pulse testing platform among the figure.
The voltage that whole valve arm bears is about 10kV, the about 700V of single IGBT static state voltage equipoise, the about 380A of electric current.
3, illustrate
After charge circuit charged to the test required voltage with high density impulse capacitor group 9, with 3 zeroings of three-phase electric voltage regulator, high density impulse capacitor group 9 provided the excitation of required voltage, levels of current for hookup.IGBT directly connects among the valve arm II12, and the gate drive signal of all IGBT is permanent to be-15V, and all IGBT all are in off state; IGBT directly connects the inverse parallel diode series connection of valve arm II12 as the afterflow passage of inductive load, at the trial by directly the connect gate drive signal of all IGBT of valve arm I11 of the control protection host computer control IGBT that is arranged in the safety zone, realize entire I GBT the opening, turn-offing of valve arm I11 of directly connecting; Use different circuit parameters, drive control waveform and relevant checkout equipment, investigate directly the connect correctness of drive circuit works of valve of each IGBT, IGBT directly connect each IGBT and IGBT among the valve arm I11 directly connect transient voltage, current waveform and the IGBT of inverse parallel diode among the valve arm II12 directly connect valve stable state, excess current turn-off and the short circuit operating mode under to the tolerance of voltage, current stress, the switching loss of test series connection valve is also assessed improvement.
Should be noted that at last: above embodiment only be used for explanation the application technical scheme but not to the restriction of its protection domain; although with reference to above-described embodiment the application is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; these changes, revise or be equal to replacement, all within the claim protection domain that application is awaited the reply.

Claims (9)

1. IGBT valve impulse test device of directly connecting is characterized in that: the circuit of described device comprise the test loop and by AC circuit breaker, pressure regulator, isolating transformer, do not control rectifier cabinet, charging resistor and the charge circuit formed of dc fuse I fast;
Described AC circuit breaker, pressure regulator, isolating transformer and do not control rectifier cabinet and connect successively, described AC circuit breaker inserts power supply; The impulse capacitor group high-pressure side of not controlling rectifier cabinet high-voltage output end and test loop of described charge circuit is connected; Do not control rectifier cabinet low-voltage output serial connection charge resistance and insert fast the low pressure end of described impulse capacitor group behind the dc fuse I successively.
2. a kind of IGBT as claimed in claim 1 valve impulse test device of directly connecting is characterized in that: described test loop comprises discharge loop, impulse capacitor group, IGBT directly connect valve arm I, IGBT directly connect valve arm II, resistance sense load and dc fuse II fast; Directly the connect anode tap of valve arm I of the high-pressure side of described impulse capacitor group and IGBT is in series, the low pressure end of described impulse capacitor group connect with quick dc fuse II afterwards and to be connected in series mutually with directly the connect cathode terminal of valve arm II and the resistance terminal of resistance sense load of IGBT, parallel discharge loop, described impulse capacitor group two ends, the inductance end of described resistance sense load and IGBT directly the connect anode tap of valve arm II of the cathode terminal of valve arm I and IGBT of directly connecting is connected in series mutually.
3. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting, it is characterized in that: control protection main frame is connected with VBC, and described VBC and the IGBT grid of each IGBT of directly connecting among the valve arm I is connected respectively.
4. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting is characterized in that: described IGBT valve arm I and the IGBT valve arm II that directly connects that directly connects is test product valve.
5. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting is characterized in that: the described IGBT valve arm I that directly connects comprises the IGBT module I of several series connection, and described IGBT module I comprises IGBT and inverse parallel diode.
6. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting, it is characterized in that: the described IGBT valve arm II that directly connects comprises the IGBT module ii of several series connection, described IGBT module ii comprises IGBT, inverse parallel diode and 15V power supply, and the both positive and negative polarity of described 15V power supply links to each other with grid with the emitter of IGBT respectively.
7. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting is characterized in that: described resistance sense load comprises a resistance and one inductance of series connection with it.
8. a kind of IGBT as claimed in claim 2 valve impulse test device of directly connecting, it is characterized in that: described discharge loop comprises discharge current-limiting resistance and single-phase switch.
9. a kind of IGBT as claimed in claim 1 or 2 valve impulse test device of directly connecting, it is characterized in that: described pressure regulator is the three-phase electric voltage regulator, described isolating transformer is three-phase 380V/10kV isolating transformer, described charging resistor is current-limiting charge resistance, and described impulse capacitor is the high density impulse capacitor.
CN 201320077992 2013-02-20 2013-02-20 Impulse testing apparatus of IGBT direct series valve CN203164375U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103645399A (en) * 2013-11-30 2014-03-19 许继电气股份有限公司 Converter valve submodule automatic test system and thyristor test circuit thereof
CN103647536A (en) * 2013-12-05 2014-03-19 华北电力大学 Electromagnetic solid-state switch and detection apparatus for high-voltage loop
CN103954866A (en) * 2014-05-09 2014-07-30 国家电网公司 Testing circuit of half-bridge-structure voltage source current converter and modulation method thereof
CN104422838A (en) * 2013-09-10 2015-03-18 南京南瑞继保电气有限公司 System for testing running of power module of power electronics
CN105044581A (en) * 2015-03-30 2015-11-11 国家电网公司 Test method and test circuit for dynamic voltage-balancing characteristic and reverse recovery characteristic of SiC IGBT (Insulated Gate Bipolar Transistor) serial connection valve block
CN107024653A (en) * 2017-06-14 2017-08-08 南京南瑞继保电气有限公司 The on-line measuring device and method of a kind of high voltage DC breaker
CN108107341A (en) * 2017-10-31 2018-06-01 南京南瑞集团公司 A kind of test platform applied to the direct cascaded H axle assemble of IGBT device
CN103954893B (en) * 2014-05-09 2018-11-27 国家电网公司 A kind of thyristor shunt detection circuit and detection method for voltage source converter

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104422838A (en) * 2013-09-10 2015-03-18 南京南瑞继保电气有限公司 System for testing running of power module of power electronics
CN103645399B (en) * 2013-11-30 2016-04-20 许继电气股份有限公司 A kind of converter valve submodule Auto-Test System and thyristor test circuit thereof
CN103645399A (en) * 2013-11-30 2014-03-19 许继电气股份有限公司 Converter valve submodule automatic test system and thyristor test circuit thereof
CN103647536A (en) * 2013-12-05 2014-03-19 华北电力大学 Electromagnetic solid-state switch and detection apparatus for high-voltage loop
CN103647536B (en) * 2013-12-05 2016-05-25 华北电力大学 For electromagnetic type solid switch and the checkout gear of high tension loop
CN103954893B (en) * 2014-05-09 2018-11-27 国家电网公司 A kind of thyristor shunt detection circuit and detection method for voltage source converter
CN103954866A (en) * 2014-05-09 2014-07-30 国家电网公司 Testing circuit of half-bridge-structure voltage source current converter and modulation method thereof
CN103954866B (en) * 2014-05-09 2017-04-05 国家电网公司 A kind of hookup and its modulator approach of half-bridge structure voltage source converter
CN105044581B (en) * 2015-03-30 2018-02-13 国家电网公司 The method of testing and test circuit of a kind of SiC IGBT series connection valve group dynamic voltage balancing characteristics and reverse recovery characteristic
CN105044581A (en) * 2015-03-30 2015-11-11 国家电网公司 Test method and test circuit for dynamic voltage-balancing characteristic and reverse recovery characteristic of SiC IGBT (Insulated Gate Bipolar Transistor) serial connection valve block
CN107024653A (en) * 2017-06-14 2017-08-08 南京南瑞继保电气有限公司 The on-line measuring device and method of a kind of high voltage DC breaker
CN107024653B (en) * 2017-06-14 2019-09-27 南京南瑞继保电气有限公司 A kind of on-line measuring device and method of high voltage DC breaker
CN108107341A (en) * 2017-10-31 2018-06-01 南京南瑞集团公司 A kind of test platform applied to the direct cascaded H axle assemble of IGBT device

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