CN203502516U - Full-voltage full-current operation test system for current conversion chains of chained static synchronous compensator - Google Patents
Full-voltage full-current operation test system for current conversion chains of chained static synchronous compensator Download PDFInfo
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- CN203502516U CN203502516U CN201320592683.5U CN201320592683U CN203502516U CN 203502516 U CN203502516 U CN 203502516U CN 201320592683 U CN201320592683 U CN 201320592683U CN 203502516 U CN203502516 U CN 203502516U
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Abstract
The utility model discloses a full-voltage full-current operation test system for current conversion chains of a chained static synchronous compensator. The full-voltage full-current operation test system comprises a main loop formed by a first auxiliary chain link, a first sample current conversion chain, a load reactor, a second sample current conversion chain and a second auxiliary chain link which are connected end to end in sequence. Common coupling points of the first auxiliary chain link and the second auxiliary chain link are grounded. A pre-charge branch serially provided with a charging power supply is connected between one side of the load reactor and the ground. Two ends of a direct current bus capacitor of each or one of the two auxiliary chain links are connected with an auxiliary power supply branch. The testing of the full-voltage full-current operation test system is more close to the real condition; two sample current conversion chains can be tested at one time, so that the test efficiency can be substantially increased; a back-to-back internal circulation operation mode is adopted, and the full-voltage full-current test of the sample current conversion chains can be realized; a high-voltage large-power supply is not needed, and only the loss power is absorbed from the auxiliary power supply, so that the electricity cost of the test can be substantially saved.
Description
Technical field
The utility model relates to a kind of chain static synchronous compensator change of current chain total head total current running test system.
Background technology
Intelligent grid construction be unable to do without high-power electric and electronic product, the development of high-power electric and electronic product and experimental technique have become the focus of scientific research institutions and enterprises and institutions' research, along with the development of high-power electric and electronic product toward larger electric pressure and capacity, two level or three Level Technology can not meet its voltage day by day increasing and capacity requirement, therefore increasing high-power electric and electronic product adopts chain static synchronous compensator topology, and adopt a plurality of power chain links to be connected in series, by modulation, the exportable chain static synchronous compensator voltage waveform that approaches sine wave of change of current chain, can greatly reduce or save output filter circuit.
The chain link topology of chain static synchronous compensator change of current chain as shown in Figure 1, as seen from the figure, this chain link is the H bridge mode based on 4 IGBT, due to chain static synchronous compensator change of current chain, to have electric pressure high, feature capacious, in factory, cannot carry out total head and total current running test, therefore general employing synthesized operating test device.
The conventional a kind of chain static synchronous compensator testing device for operation of current changing chain forming for H bridge chain section of industry as shown in Figure 2, only adopt 2 H bridge chain sections to carry out mechanical back to back test, as China Patent No. 200610064926.2 discloses a kind of test method of chain static synchronous compensator IGCT valve, this test unit has the following disadvantages: the test product chain link series connection progression that (1) does not meet standard " IEC62501-2009 voltage source converter chain (VSC-HVDC)-electric test " regulation is no less than 5 grades, is no less than in any case the requirement of 3 grades; (2) this running test operating mode and actual condition have larger difference: as shown in Figure 2, the DC power voltage stabilizing of the chain link outer portion of DC bus 1., 1. and 2. chain link is all pressed with voltage stabilizing and is controlled and just can normally move without carrying out chain link, and in actual operating mode, need two chain links all to press and control with voltage stabilizing; (3) Figure 2 shows that two single power models are to dragging operation, because not being a complete change of current chain component, cannot check each power model whether can tolerate interference each other.
The running test object of the chain static synchronous compensator change of current chain forming due to H bridge chain section is that test change of current chain is at maximum continuous current operating condition, maximum is overload electric current operating condition in short-term, and whether the electric current under overcurrent turn-off function operating condition, voltage and temperature stress meet design requirement, therefore need to provide a kind of operating condition of test to approach to greatest extent the test unit of the actual operating mode of change of current chain.
Utility model content
The purpose of this utility model is to provide a kind of chain static synchronous compensator change of current chain total head total current running test system, to solve the problem of the discontented sufficient actual operating mode requirement of existing test unit.
In order to realize above object, the technical scheme that the utility model adopts is: a kind of chain static synchronous compensator change of current chain total head total current running test system, comprise the major loop that the first auxiliary chain link, the first test product change of current chain, load reactance device, the second test product change of current chain, the second auxiliary chain link join end to end successively and form, the points of common connection ground connection of the described first auxiliary chain link and the second auxiliary chain link; Between load reactance device one side and ground, be connected with the precharge branch that a string is provided with charge power supply; The dc-link capacitance two ends of two auxiliary chain links or one of them auxiliary chain link are connected with accessory power supply branch road; Two auxiliary chain links consist of H bridge chain section respectively, and the first test product change of current chain and the second test product change of current chain are the chain static synchronous compensator change of current chain that at least three H bridge chain sections form.
In described precharge branch, also string is provided with charging current limiter resistance and charging disconnector.
Described accessory power supply props up series arm and the auxiliary charging electric capacity formation parallel with one another of route accessory power supply, auxiliary gauge tap and auxiliary reactor.
Chain static synchronous compensator change of current chain total head total current running test system of the present utility model is compared with existing test unit, and tool has the following advantages:
(1) can be to being tested by 3 grades and above H bridge chain section chain static synchronous compensator change of current chain in series, test product can be the screen that one side that a phase change of current chain or one can complete reaction change of current chain product air channels is provided with change of current chain, test examination more approaches actual condition, comprises the mutual antijamming capability of chain internode, all pressures of chain link DC voltage and voltage stabilizing control etc.;
(2) once can test two test product change of current chains, can greatly improve the efficiency of test, as a test product change of current chain consists of 12 chain links, test product change of current chain each that can form 24 chain links is tested, if this device, as product export test, can effectively shorten the test period of change of current chain;
(3) adopt the inner circulation method of operation back-to-back, test product change of current chain can reach the object of full voltage and total current test, but what from accessory power supply, absorb is only loss power, can greatly save test electricity cost;
(4) without high-power power supply, more than only need test product change of current chain being charged to minimum operating voltage by little pre-charge electricity branch road, by controlling, just can realize test product change of current chain and move by the electric current and voltage of setting, that this device is realized is convenient, simply, safety;
(5) meet the requirement of STATCOM change of current chain test completely, the maximum continuous current running test that same actual operating mode is suitable can be provided, maximum is overload electric current running test in short-term, and overcurrent turn-off function running test, can fully check the loss of test product change of current chain, temperature rise, noise, current changing rate (di/dt), voltage change ratio (dv/dt), antijamming capability etc. whether to meet design requirement.
Accompanying drawing explanation
Fig. 1 is chain static synchronous compensator change of current chain chain link schematic diagram;
Fig. 2 is the schematic diagrams of traditional experiment mode two chain links to dragging operation;
Fig. 3 is the utility model chain static synchronous compensator change of current chain running test systematic schematic diagram;
Fig. 4 is the running test simulation waveform figure of the utility model chain static synchronous compensator change of current chain.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 3 the structure principle chart of the utility model chain static synchronous compensator change of current chain total head total current running test system embodiment, as seen from the figure, this pilot system comprises the main Power operation loop that the first auxiliary chain link SMa, the first test product change of current chain U1, load reactance device La, the second test product change of current chain U2, the second auxiliary chain link SMb join end to end successively and form, the points of common connection ground connection of the first auxiliary chain link SMa and the second auxiliary chain link SMb; Between a side of load reactance device La and ground, be connected with the precharge branch that a string is provided with charge power supply E3; The dc-link capacitance two ends of two auxiliary chain links or one of them auxiliary chain link are connected with accessory power supply branch road; Two auxiliary chain links consist of H bridge chain section respectively, and the first test product change of current chain and the second test product change of current chain are the chain static synchronous compensator change of current chain that at least three H bridge chain sections form.
For ease of controlling, in the precharge branch of the present embodiment, also string is provided with charging current limiter resistance R 1 and charging disconnector Kc3.
The present embodiment adopts two accessory power supply branch roads, is connected on respectively the dc-link capacitance two ends of two auxiliary chain links, and two accessory power supply branch roads are by series arm and the auxiliary charging electric capacity formation parallel with one another of accessory power supply, auxiliary gauge tap and auxiliary reactor.As shown in Figure 3, the first accessory power supply branch road consisting of E1, Kc1, L1 and C1 is connected with the dc-link capacitance of auxiliary chain link SMa; The second accessory power supply consisting of E2, Kc2, L2 and C2 is connected with the dc-link capacitance of auxiliary chain link SMb.
Test principle and the process of chain static synchronous compensator change of current chain total head total current running test system of the present utility model are as follows: when test starts, first by the first accessory power supply branch road and the second accessory power supply branch road, charge to respectively auxiliary chain link SMa and SMb, until charge to setting voltage; By precharge branch, respectively two test product change of current chain U1 and U2 are charged again, until more than each chain link voltage of two test product change of current chains all reaches minimum operating voltage, disconnect precharge loop, startup system control, trigger each chain link by setting voltage and electric current operation, two test product change of current chains are examined, as the test product change of current chain operation simulation waveform of Fig. 4 for being formed by 6 H bridge chain sections.When test stops, first each chain link trigger pulse of locking test product change of current chain, disconnects two accessory power supply branch roads, until the self discharge of test product change of current chain is 0, and off-test.
The present embodiment is to take two accessory power supply branch roads to describe as example, if be certainly careless about circuit symmetrical, also can adopt the structure that only adds accessory power supply branch road on the auxiliary chain link of a side, the accessory power supply by a side supplements the loss of whole test loop.Above-described embodiment only illustrates that the technical solution of the utility model is not intended to limit, and those skilled in the art adopt the modification that routine techniques means carry out embodiment or are equal to replacement, all drop in protection domain of the present utility model.
The application is subsidized by national high-tech research development plan (863 Program) problem, project number: 2012AA050206.
Claims (3)
1. a chain static synchronous compensator change of current chain total head total current running test system, it is characterized in that: comprise the major loop that the first auxiliary chain link, the first test product change of current chain, load reactance device, the second test product change of current chain, the second auxiliary chain link join end to end successively and form, the points of common connection ground connection of the described first auxiliary chain link and the second auxiliary chain link; Between load reactance device one side and ground, be connected with the precharge branch that a string is provided with charge power supply; The dc-link capacitance two ends of two auxiliary chain links or one of them auxiliary chain link are connected with accessory power supply branch road; Two auxiliary chain links consist of H bridge chain section respectively, and the first test product change of current chain and the second test product change of current chain are the chain static synchronous compensator change of current chain that at least three H bridge chain sections form.
2. chain static synchronous compensator change of current chain total head total current running test system according to claim 1, is characterized in that: in described precharge branch, also string is provided with charging current limiter resistance and charging disconnector.
3. chain static synchronous compensator change of current chain total head total current running test system according to claim 1 and 2, is characterized in that: described accessory power supply props up series arm and the auxiliary charging electric capacity formation parallel with one another of route accessory power supply, auxiliary gauge tap and auxiliary reactor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320592683.5U CN203502516U (en) | 2013-09-24 | 2013-09-24 | Full-voltage full-current operation test system for current conversion chains of chained static synchronous compensator |
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| CN201320592683.5U CN203502516U (en) | 2013-09-24 | 2013-09-24 | Full-voltage full-current operation test system for current conversion chains of chained static synchronous compensator |
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| CN203502516U true CN203502516U (en) | 2014-03-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107003355A (en) * | 2014-09-22 | 2017-08-01 | 通用电器技术有限公司 | Synthesize test circuit |
| CN112994133A (en) * | 2019-12-17 | 2021-06-18 | 西安西电高压开关有限责任公司 | Energy storage battery interface device |
-
2013
- 2013-09-24 CN CN201320592683.5U patent/CN203502516U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107003355A (en) * | 2014-09-22 | 2017-08-01 | 通用电器技术有限公司 | Synthesize test circuit |
| CN112994133A (en) * | 2019-12-17 | 2021-06-18 | 西安西电高压开关有限责任公司 | Energy storage battery interface device |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20221020 Address after: No. 4138, Sunshine Avenue, Xuchang Economic Development Zone, Henan 461000 Patentee after: Henan Xuji Power Electronics Co.,Ltd. Patentee after: XJ ELECTRIC Co.,Ltd. Address before: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Patentee before: XJ ELECTRIC Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20140326 |