CN202421352U - Integrated testing circuit for modular multi-level converter valve - Google Patents
Integrated testing circuit for modular multi-level converter valve Download PDFInfo
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- CN202421352U CN202421352U CN2011204925060U CN201120492506U CN202421352U CN 202421352 U CN202421352 U CN 202421352U CN 2011204925060 U CN2011204925060 U CN 2011204925060U CN 201120492506 U CN201120492506 U CN 201120492506U CN 202421352 U CN202421352 U CN 202421352U
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- 238000012360 testing method Methods 0.000 title claims abstract description 157
- 238000002474 experimental method Methods 0.000 claims description 30
- 230000010354 integration Effects 0.000 claims description 22
- 230000004224 protection Effects 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model relates to an integrated testing circuit for a modular multi-level converter valve, which comprises a main circuit, sample valves and a control protective circuit. The control protective circuit controls the main circuit and the sample valves, the sample valves are subjected to power recharging and on-load test. The integrated testing circuit detects and guarantees normal running of the converter valve, when the converter valve is incorrectly operated, misoperation prompt is issued through voltage signals. A voltage regulating circuit and alternating-current and direct-current testing circuits of the converter valve are effectively integrated in the integrated testing circuit, and voltage testing, current-adjustable power recharging and on-load testing of the converter valve are completed. Operating states of elements in a forward recharging access and a reverse recharging access of the converter valve are fully detected by alternating-current recharging, and safety and reliability of subsequent tests are guaranteed. Further, large current is generated by reactive power energy switch, and active loss of the testing circuit and capacity of a testing input source are reduced.
Description
Technical field:
The utility model relates to field of power electronics, is specifically related to a kind of integration test circuit of modular multilevel converter valve.
Background technology:
The modular multilevel converter valve is promoted in D.C. high voltage transmission (HVDC), flexible ac transmission high-voltage large-capacity application scenarios such as (FACTS) just day by day; It must carry out delivery test and type approval test according to IEC relevant criterion and actual operating mode, to check its design and production.Modular multilevel converter valve test method and test unit are still blank at present.
The method of modular multilevel converter valve employing power model PM cascade promotes the voltage and the capacitance grade of converter valve, and is as shown in Figure 1.Power model generally includes four part (see figure 2)s: the half-bridge structure power electronics unit that (1) is made up of a plurality of full-control type devices such as insulated gate bipolar transistor IGBT module, integrated inverse parallel diode in each IGBT module; (2) play the capacitor C of energy storage and DC voltage supporting role; (3) module controller of control and protection power model; (4) getting for the high position of module controller power supply can power supply.Converter valve has 4 kinds of basic operating conditions: (a) power on; (b) locking; (c) release; (d) power down.Wherein, after the converter valve release,, be divided into zero load, fully loaded and overload operation based on the difference of load.In addition, converter valve disposes protections such as overvoltage, overcurrent, the gentle short circuit of mistake usually.The modular multilevel converter valve has following outstanding characteristics:
1) the cascade number of converter valve power model needs to confirm according to the real application systems situation, can be from several to up to a hundred.
2) at high pressure applications, the charged work of module controller depends on main.This is because each power model of converter valve is in different noble potential (more than hundred kilovolts), and the power supply of module controller adopts usually from a main circuit component high position and gets the ability mode, to avoid and earthy high voltage isolation difficult problem.
The converter valve test requires to accomplish the experimental examination of converter valve control defencive function and various operating conditions on the one hand; Must fully take into account modular multilevel converter valve singularity on the other hand, therefore test method and the circuit design to converter valve need satisfy following requirement:
(1) satisfies the variable testing requirements of converter valve power module cascade connection number.
(2) as a rule, on converter valve, need its controller elder generation operate as normal before the main electricity, to implement reliable control and the protection in the converter valve power up.And many level of high-pressure modularization converter valve takes a high position to get the ability powering mode; Its controller can't shift to an earlier date charged work; Therefore test method must be considered the safety test of converter valve under this operating mode, avoids because test causes its fault coverage to enlarge in the out of order situation of converter valve itself.
The utility model content:
Deficiency to prior art; The utility model provides a kind of integration test circuit of modular multilevel converter valve; This circuit effective integration the voltage-regulation of converter valve, ac test circuit and DC experiment circuit; In conjunction with carry from AC charging to the direct current band, from low pressure to the rated voltage to overvoltage, from zero load to fully loaded to the test method that is overload up to short circuit, to converter valve implement comprehensively, system and test reliably.
The integration test circuit of a kind of modular multilevel converter valve that the utility model provides, its improvements are that said integration test circuit comprises main circuit, test product valve and control protection electric circuit; Said main circuit is connected with said test product valve with the single-phase AC experiment power supply respectively, and said control protection electric circuit is connected with said test product valve with said main circuit respectively.
The integration test circuit of first preferred version that the utility model provides, its improvements are that said main circuit comprises pressure-control circuit, single-phase AC test loop, DC experiment loop and load; Connect with said pressure-control circuit after said single-phase AC test loop and the loop parallel connection of said DC experiment;
Said single-phase AC test loop comprises two output terminals (I, II); Said DC experiment loop comprises two output terminals (I, II);
Between the output terminal I of said single-phase AC test loop and the output terminal II load is set.
The integration test circuit of second preferred version that the utility model provides, its improvements are that said control protection electric circuit comprises valve base controller and main circuit controller; Said valve base controller is connected with said test product valve with said main circuit controller respectively and is connected; Said main circuit controller is connected with said main circuit.
The integration test circuit of the 3rd preferred version that the utility model provides, its improvements are that said test product valve is a converter valve, and said test product valve comprises test product valve A and test product valve B;
The positive pole of the positive pole of said test product valve A and said test product valve B is connected with two output terminals (I, II) of said single-phase AC test loop respectively;
The capacitance pole of the capacitance pole of said test product valve A or said test product valve B is connected with the output terminal I in said DC experiment loop;
The negative pole short circuit of said test product valve A and said test product valve B also is connected with the output terminal II in said DC experiment loop.
The integration test circuit of the 4th preferred version that the utility model provides, its improvements are that said main circuit comprises switch (K
1-K
4), said K switch
1Be arranged between said pressure-control circuit and the said single-phase AC hookup; Said K switch
2Be arranged between said pressure-control circuit and the said DC experiment loop; Said K switch
3Be arranged between said DC experiment loop and the said test product valve; Said K switch
4Be arranged between two output terminals (I, II) of said single-phase AC test loop, connect with said load.
The integration test circuit of the more preferably scheme that the utility model provides, its improvements are that said single-phase AC test loop comprises resistance, current sensor and IGBT module; Said current sensor is connected with the output terminal II of said single-phase AC test loop with said IGBT module series connection back; Said resistance is connected with the output terminal I of said single-phase AC test loop.
With the prior art ratio, the beneficial effect of the utility model is:
1. the utility model detects and has guaranteed the normal operation of converter valve, when converter valve during by maloperation, proposes miscue through voltage signal.
The utility model effective integration the pressure regulation of converter valve, interchange, DC experiment circuit, accomplish trial voltage, the adjustable converter valve charging of electric current and band and carry test.
3. adopt AC charging to check components and parts duty in the forward and reverse charging path of converter valve comprehensively, guarantee the safe reliability of follow-up test.
4. utilize the quadergy exchange to produce big electric current, reduce the capacity of main circuit active loss and test input power supply.
Description of drawings
Fig. 1 is existing modular multilevel converter valve.
Fig. 2 is existing modular multilevel converter valve power model.
The modularization level converter valve integration test circuit that Fig. 3 provides for the utility model.
The steady switching controls of modular multilevel converter valve integration test circuit that Fig. 4 provides for the utility model.
Wherein, P and N are the converter valve output terminal; Ne is the storage capacitor utmost point of power model; E is a direct current energy; PM is the power model of converter valve; Np and Nn are the output terminal of the power model of converter valve; Ctr and Ctrx are the signal of controller; K
1-K
4Be switch; CT1 is a current sensor.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done further to specify.
As shown in Figure 3, the integration test electric current of present embodiment comprises three parts: main circuit, test product valve and control protection electric circuit.Control protection electric circuit control main circuit and test product valve carry out test product valve charging and band and carry test.
Main circuit comprises pressure-control circuit, single-phase AC test loop, DC experiment loop, load and K switch
1-K
4Connect with pressure-control circuit after single-phase AC test loop and the parallel connection of DC experiment loop; On the branch road between individual event AC Test Circuits and the pressure-control circuit, K switch is set
1On the branch road between DC experiment loop and the pressure-control circuit, K switch is set
2Single-phase AC test loop and DC experiment loop include two output terminal I, II; Between the output terminal I of single-phase AC test loop and the output terminal II load L and K switch are set
4, load L and K switch
4Series connection.
Test product valve is a converter valve, and test product valve comprises test product valve A and test product valve B; The positive pole (being made as the P utmost point) of the positive pole of test product valve A (being made as the P utmost point) and test product valve B is connected with two output terminal I, II of single-phase AC test loop respectively; The capacitance pole (being made as the E utmost point) of the capacitance pole of test product valve A (being made as the E utmost point) or said test product valve B is connected with the output terminal I in DC experiment loop; The negative pole of test product valve A and test product valve B (being made as the N utmost point) short circuit also is connected with the output terminal II in DC experiment loop, and the output terminal II ground connection in DC experiment loop.Between said DC experiment loop and said test product valve, K switch is set
3
Control protection electric circuit comprises valve base controller and main circuit controller; The valve base controller is connected with test product valve with the main circuit controller respectively and is connected; The main circuit controller is connected with main circuit.
Pressure-control circuit is connected with the single-phase AC test.Pressure-control circuit is regulated the size of input AC experiment power supply voltage magnitude, is used to satisfy the trial voltage class requirement of different capacity module series connection progression converter valve.
Concrete, present embodiment comprises the steps: the control method of inheriting test current
(1) the main circuit controller is with said switch (K
1-K
4) all be set to off-state;
(2) the closed said K switch of main circuit controller
1, pressure-control circuit is passed to test product valve with electric current through the single-phase AC test loop, and valve base opertaing device control test product valve carries out test product valve charging test;
The positive pole of single-phase AC test loop output and ground are connected to the anodal P of test product valve A and test product valve B respectively, and two test product valve negative pole N short circuits realize that band carries the AC charging test of testing preceding two test products.AC charging has overcome the shortcoming of the unidirectional charging of direct current; Can carry components and parts duty in the forward and reverse charging path of the comprehensive before inspection converter valve of test at band; Can find early that converter valve itself has fault; Avoid guaranteeing the safe reliability of follow-up test because test causes its fault coverage to enlarge.
(3) according to the result of step (2), correct if test product valve connects, then carry out step (4), otherwise return the cut-in method of step (1) and transposing test product valve;
(4) the main circuit controller breaks off said K switch
1, closed said K switch
2, K
3And K
4, pressure-control circuit changes into direct current with electric current through the DC experiment loop and passes to test product valve and load, is with to carry test.
The band of converter valve carries test usually in order to produce the capacity that big electric current reduces main circuit active loss and test input power supply simultaneously, utilizes the quadergy exchange to produce big electric current usually, and active power is mainly the loss of test product valve switching device.The anodal P of test product valve A directly has been connected a reactor load L with the anodal P of test product valve B; Control sine pulse width modulation (PWM) ripple or the staircase waveform that two test product valves produce phase differential 0～180 degree respectively through the main circuit controller; Make produce power exchange between storage capacitor C and the reactor L in two test product valves; The band of realizing two test product valves carries test, the size of phase differential, modulation ratio or the equal scalable test current of reactor inductance value through regulating the sine wave that test product valve generates.Owing to constituted the energy exchange loop between positive pole, negative pole and the inductance of two test products; Can't adopt ac circuit to pass through the anodal continued power of test product; But adopt the positive pole of DC loop and storage capacitor utmost point E and the negative pole N that ground is connected to test product valve A or test product valve B respectively, give the storage capacitor continued power to guarantee to continue run with load.
Because two test product valves earth point in AC Test Circuits and DC experiment loop is different; Therefore switching in the AC and DC test loop is to solve steady current potential switching problem; Be consistent before the switching point N utmost point switches, be the ground electrode potential, with warranty test safety with the switching afterpotential.Like Fig. 3, when exchanging positive charge, the inverse parallel diode current flow of half-bridge under the test product valve A power model, N electrode potential are ac circuit ground electrode potential; And when exchanging the negative sense charging, the inverse parallel diode current flow of half-bridge under the test product valve B power model, N electrode potential are the anodal current potential of ac circuit.For this reason, present embodiment proposes to adopt the steady method for handover control in AC and DC loop as shown in Figure 4, promptly in the single-phase AC loop, seals in a current sensor and IGBT auxiliary valve;, AC charging opens IGBT auxiliary valve turn-on reversal charge circuit when testing through controller; When switching, close the IGBT auxiliary valve through controller and cut off the reverse charging loop, make main circuit be in the positive charge state in the test loop; Guarantee that the N electrode potential is the earth polar, and then stopcock K
1Withdraw from AC Test Circuits, Closing Switch K
3Drop into the DC experiment road, reach the purpose that realizes that the AC and DC loop is steadily switched.
Should be noted that at last: combine the foregoing description only explain the utility model technical scheme but not to its restriction.Under the those of ordinary skill in field be to be understood that: those skilled in the art can make amendment or are equal to replacement the embodiment of the utility model, but these modifications or change are all among the claim protection domain that application is awaited the reply.
Claims (6)
1. the integration test circuit of a modular multilevel converter valve is characterized in that, said integration test circuit comprises main circuit, test product valve and control protection electric circuit; Said main circuit is connected with said test product valve with the single-phase AC experiment power supply respectively, and said control protection electric circuit is connected with said test product valve with said main circuit respectively.
2. integration test circuit as claimed in claim 1 is characterized in that, said main circuit comprises pressure-control circuit, single-phase AC test loop, DC experiment loop and load; Connect with said pressure-control circuit after said single-phase AC test loop and the loop parallel connection of said DC experiment;
Said single-phase AC test loop comprises two output terminals (I, II); Said DC experiment loop comprises two output terminals (I, II);
Between the output terminal I of said single-phase AC test loop and the output terminal II load is set.
3. integration test circuit as claimed in claim 1 is characterized in that, said control protection electric circuit comprises valve base controller and main circuit controller; Said valve base controller is connected with said test product valve with said main circuit controller respectively and is connected; Said main circuit controller is connected with said main circuit.
4. integration test circuit as claimed in claim 1 is characterized in that, said test product valve is a converter valve, and said test product valve comprises test product valve A and test product valve B;
The positive pole of the positive pole of said test product valve A and said test product valve B is connected with two output terminals (I, II) of said single-phase AC test loop respectively;
The capacitance pole of the capacitance pole of said test product valve A or said test product valve B is connected with the output terminal I in said DC experiment loop;
The negative pole short circuit of said test product valve A and said test product valve B also is connected with the output terminal II in said DC experiment loop.
5. integration test circuit as claimed in claim 1 is characterized in that said main circuit comprises switch (K
1-K
4), said K switch
1Be arranged between said pressure-control circuit and the said single-phase AC hookup; Said K switch
2Be arranged between said pressure-control circuit and the said DC experiment loop; Said K switch
3Be arranged between said DC experiment loop and the said test product valve; Said K switch
4Be arranged between two output terminals (I, II) of said single-phase AC test loop, connect with said load.
6. integration test circuit as claimed in claim 2 is characterized in that, said single-phase AC test loop comprises resistance, current sensor and IGBT module; Said current sensor is connected with the output terminal II of said single-phase AC test loop with said IGBT module series connection back; Said resistance is connected with the output terminal I of said single-phase AC test loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204925060U CN202421352U (en) | 2011-12-01 | 2011-12-01 | Integrated testing circuit for modular multi-level converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204925060U CN202421352U (en) | 2011-12-01 | 2011-12-01 | Integrated testing circuit for modular multi-level converter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421352U true CN202421352U (en) | 2012-09-05 |
Family
ID=46746105
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204925060U Expired - Lifetime CN202421352U (en) | 2011-12-01 | 2011-12-01 | Integrated testing circuit for modular multi-level converter valve |
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| Country | Link |
|---|---|
| CN (1) | CN202421352U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197271A (en) * | 2013-02-25 | 2013-07-10 | 国网智能电网研究院 | Testing method for maximum metal condition (MMC) topological flexible direct-current transmission testing platform |
| 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 |
| CN104422858A (en) * | 2013-09-09 | 2015-03-18 | 南京南瑞继保电气有限公司 | High-voltage AC-DC testing circuit and testing method thereof |
-
2011
- 2011-12-01 CN CN2011204925060U patent/CN202421352U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197271A (en) * | 2013-02-25 | 2013-07-10 | 国网智能电网研究院 | Testing method for maximum metal condition (MMC) topological flexible direct-current transmission testing platform |
| CN103197271B (en) * | 2013-02-25 | 2016-01-20 | 国网智能电网研究院 | A kind of method of inspection of MMC topological flexibility direct current transportation test platform |
| CN104422858A (en) * | 2013-09-09 | 2015-03-18 | 南京南瑞继保电气有限公司 | High-voltage AC-DC testing circuit and testing method thereof |
| CN104422858B (en) * | 2013-09-09 | 2017-05-17 | 南京南瑞继保电气有限公司 | High-voltage AC-DC testing circuit and testing method thereof |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140401 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140401 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140401 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |