CN101776733B - Service test method of minimum trigger angle of DC converter valve with asymmetric voltage - Google Patents
Service test method of minimum trigger angle of DC converter valve with asymmetric voltage Download PDFInfo
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Abstract
The invention provides a service test method of minimum trigger angle of DC converter valve with asymmetric voltage, belonging to the field of power electronics and electric power system simulated test. The invention causes test object voltage to rise to the needed value by triggering an auxiliary valve in proper time within the period of voltage source charging, test object voltage wave shape is approximate to the practical working condition; DC heavy current is provided by six pulsation rectifier bridges, and the wave shape is almost the same with the practical working condition.
Description
Technical field
The present invention relates to power electronics and power system simulation experiment field, be specifically related to a kind of testing direct current converter valve method, relate in particular to a kind of DC converter valve minimum triggering angle running test method of asymmetrical voltage.
Background technology
Direct current transportation is at long-distance and large-capacity power transmission; Asynchronous Interconnection; unrivaled advantage has been compared in the aspects such as subsea cable electric power transfer with ac transmission; DC converter valve is as core, the key equipment of direct current transportation; guarantee its safe and reliable stable operation; the system that is not only is to the requirement of device, the especially requirement of unit protection self.And running test is the important means of check valve performance.Owing to the increase of single thyristor voltage current capacity, adopt synthetic test method that DC converter valve is carried out running test and obtain international relevant criterion approval at present.Its basic thought is that the required high pressure of test, large strength of current provide by high voltage-small current loop and low-voltage, high-current loop respectively, and alternately puts on the test product valve.
The minimum trigger angle test because of its singularity in testing requirements, has determined that its test method is different from other running test project of converter valve as a pilot project of DC converter valve operating test.Present minimum trigger angle test method is difficult to take into account at test product scope, control difficulty, equivalence comprehensively.
Minimum trigger angle test examination test product valve reduces at system's alternating voltage, the operational reliability when Trigger Angle is the system minimum value.Under this operating mode, because Trigger Angle is little, so turning-on voltage is low, it is unfavorable that this thyristor valve to series connection is opened; Low valve terminal voltage peak-to-peak value is unfavorable to relying on the valve terminal voltage to rise to get the gate circuit transistor gate cell operation that can power.DC converter valve should be able to guarantee under this operating mode reliably open-minded when design, and the gate pole unit can fully be got can be to guarantee normal operation.For the correctness of checking design and the qualification of manufacturing need to be carried out minimum triggering angle running test to converter valve, and this patent can well reach this examination purpose.
Chinese patent application 200710177109.2 discloses a kind of method of direct current converter valve low voltage parameter operation test, be connected to the high voltage-small current resource loop, in a test period T, trigger action sequential flow process operates as follows: T0～T1 stage, control 6 pulse bridge Trigger Angle A by testing requirements; In the T1 moment, triggering and conducting VT and V1 valve are introduced large electric current half-wave DC; In the T2 moment, from the half-wave current zero passage in low-voltage, high-current source, V1 begins to close; T2～T3 moment, the V1 valve breakdown, the little electric current of VT valve arm continues to pass through test product; The T3 moment, VT valve zero-crossing switching, the high voltage-small current resource loop provides required test product valve voltage.The equivalence of described direct current converter valve low voltage parameter test method the recovery step voltage of turning-on voltage and shutoff, can finish minimum AC voltage test, the test of transient state under-voltage and intermittent continuous current current testing.
Content described in applying for a patent from above-mentioned institute, its test unit are specially for low voltage parameter operation test institute development and Design, can be good at finishing the running test of the low voltage parameters such as minimum trigger angle, minimum turn-off angle, intermittent continuous current current testing.But for the running test of high voltage parameter such as maximum continuous service load test, maximum transient running test, the apparatus and method described in this patented claim can not be suitable for.
The test unit high voltage source of present patent application adopts the charging oscillation circuit, can satisfy simultaneously the requirement of high voltage parameter operation test and low voltage parameter operation test, the test method that proposes can realize minimum triggering angle running test, need not to be specially the low voltage parameter operation test stand-alone development test battery devices such as minimum triggering angle running test, save cost, economical and practical.
Summary of the invention
The invention provides a kind of test method of DC converter valve minimum triggering angle running test of asymmetrical voltage, so that test product voltage rises to desirable value, test product voltage waveform and actual condition approach by suitable time trigger auxiliary valve between the voltage source charge period; D.C. high-current is provided by Six-pulse Bridge, and waveform and actual condition are basic identical.
DC converter valve minimum triggering angle test method provided by the invention is equivalent accurately turning-on voltage and valve terminal voltage variation range, the test equivalence is higher.
Technical scheme of the present invention is a kind of DC converter valve minimum triggering angle running test method of asymmetrical voltage, it is characterized in that:
(1) device that adopts of the method is the DC converter valve minimum triggering angle running test device of asymmetrical voltage, comprise low-voltage, high-current DC current source, high voltage-small current source, auxiliary valve V1 and test product valve VT, wherein, the low-voltage, high-current direct supply is in parallel with test product valve VT, and the D.C. high-current of conduction period is provided for test product valve; The high voltage-small current source is in parallel with test product valve VT by auxiliary valve V1, VT provides high voltage for test product valve, described low-voltage, high-current DC source comprises 6 stream pulsation rectifiers, the loop in described high voltage-small current source comprises charging device, capacitor C and reactor L, connects with reactor L after described charging device and the capacitor C parallel connection;
(2) step of the method comprises:
Charging device in the high voltage-small current source is to opening auxiliary valve V1 between the capacitor C charge period so that test product valve voltage falls first, then its forward voltage just reaches the trigger voltage value of design after charging is finished, the high voltage-small current source provides the required forward trigger voltage of test product and test product valve VT to close the reverse recovery voltage of having no progeny, and voltage jump and forward voltage escalating rate during the test product valve VT blocking-up, can accurately examine test product valve VT to get can;
By introducing the little electric current of the little current source of voltage, simulate the current changing rate before test product valve VT turn-offs simultaneously;
DC current is injected in test product valve VT conduction period in the low-voltage, high-current source, thereby the peak value of correct equivalent test product valve VT On current, reappear the test product valve VT loss of conduction period, at high voltage-small current source electric current in the first few hundred microsecond, the current over-zero in low-voltage, high-current source also is isolated, and guarantees simultaneously the safe and reliable shutoff of auxiliary valve V1.
Wherein, realize required minimum trigger voltage by open auxiliary valve V1 in the capacitor C charging process; By twice oscillatory process satisfy test product valve VT get can, namely in a test period, twice of the voltage of test product valve rises to positive voltage from negative voltage; Can fully verify the reliable trigger of valve and the correctness that valve is got the energy Unit Design.
The invention has the beneficial effects as follows:
1, the test method that proposes satisfies the requirement of correlation test standard fully, required test parameters flexible adjustment.
2, exactly equivalence the turning-on voltage of test product, get can the loop the examination equivalence good, the test product waveform is near actual condition, therefore the equivalence to test product is high.
3, the test product scope that the test method that proposes is suitable for is wide.
Description of drawings
In order to make content of the present invention by clearer understanding, and be convenient to the description of embodiment, it is as follows that the below provides description of drawings related to the present invention:
Fig. 1 shows the DC converter valve minimum triggering angle running test method theory diagram according to asymmetrical voltage of the present invention.
Fig. 2 shows according to minimum trigger angle trial voltage current waveform of the present invention.
Embodiment
The below is a preferred embodiment of the present invention, below in conjunction with this accompanying drawing the technical scheme that the present invention realizes is described further.
The theory diagram of direct current converter valve low voltage parameter test unit such as Fig. 1.Mainly comprise the 6 back-to-back low-voltage, high-current sources of pulsing, high voltage-small current loop, auxiliary valve V1 and test product valve VT.
The high voltage-small current source provides the required forward trigger voltage of test product and test product to close the reverse recovery voltage of having no progeny, and voltage jump and forward voltage escalating rate during the test product valve blocking-up, can accurately examine test product valve to get the correctness of energy loop design, by regulating the little electric current of the little current source of high voltage, regulate the current changing rate before test product valve turn-offs simultaneously; The low-voltage, high-current source is in test product valve conduction period injection DC current, peak value with correct equivalent test product valve On current, reappear the test product valve loss of conduction period, at high voltage-small current source electric current in the first few hundred microsecond, the low-voltage, high-current current over-zero, with the isolation of low-voltage, high-current loop, guaranteed simultaneously the safe and reliable shutoff of auxiliary valve, test waveform such as Fig. 2.
Process is as follows:
(1) t0 flows through D.C. high-current among the test product valve VT constantly;
(2) trigger auxiliary valve V1 before the DC current zero passage in the t1 moment test product valve, introduce the half-wave oscillating current;
(3) t2 moment half-wave current zero passage, capacitance voltage is reverse, and VT bears high back voltage;
(4) t3 time trigger V1 is to the capacitor C complementary energy;
(5) t4 time trigger auxiliary valve V1 is added in high back voltage on the test product valve VT entirely, and electric capacity continues complementary energy;
(6) t5 moment test product valve bears lower forward voltage, triggers and opens VT, auxiliary valve V1, introduces half-wave current;
(7) before the t6 moment half-wave current zero passage, introduce D.C. high-current, VT continues to keep conducting, and auxiliary valve V1 turn-offs subsequently, and capacitance voltage is reverse;
(8) t7 time trigger V1 is charged to forward to the capacitor C complementary energy with its voltage, is the Job readiness in next cycle;
The above by special embodiment content description the present invention, but those skilled in the art also can recognize the multiple possibility of modification and optional embodiment, for example, by combination and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included among the present invention, scope of the present invention is enclosed patent claims and coordinator restriction thereof only.
Claims (2)
1. the DC converter valve minimum triggering angle running test method of an asymmetrical voltage is characterized in that
(1) device that adopts of the method is the DC converter valve minimum triggering angle running test device of asymmetrical voltage, comprise low-voltage, high-current direct supply, high voltage-small current source, auxiliary valve V1 and test product valve VT, wherein, the low-voltage, high-current direct supply is in parallel with test product valve VT, and the D.C. high-current of conduction period is provided for test product valve; The high voltage-small current source is in parallel with test product valve VT by auxiliary valve V1, VT provides high voltage for test product valve, described low-voltage, high-current direct supply comprises 6 pulsation rectifiers, the loop in described high voltage-small current source comprises charging device, capacitor C and reactor L, connects with reactor L after described charging device and the capacitor C parallel connection;
(2) step of the method comprises:
Charging device in the high voltage-small current source is to opening auxiliary valve V1 between the capacitor C charge period so that test product valve voltage falls first, then its forward voltage just reaches the trigger voltage value of design after charging is finished, the high voltage-small current source provides the required forward trigger voltage of test product valve and test product valve VT to close the reverse recovery voltage of having no progeny, and voltage jump and forward voltage escalating rate during the test product valve VT blocking-up, can accurately examine the getting of test product valve VT can;
By introducing the little electric current in high voltage-small current source, simulate the current changing rate before test product valve VT turn-offs simultaneously;
The low-voltage, high-current direct supply injects described D.C. high-current in test product valve VT conduction period, thereby the peak value of correct equivalent test product valve VT On current, reappear the test product valve VT loss of conduction period, at high voltage-small current source electric current in the first few hundred microsecond, the current over-zero of low-voltage, high-current direct supply also is isolated, and guarantees simultaneously the safe and reliable shutoff of auxiliary valve V1.
2. the method for claim 1 is characterized in that realizing required minimum trigger voltage by open auxiliary valve V1 in the capacitor C charging process; By twice oscillatory process satisfy test product valve VT get can, namely in a test period, twice of the voltage of test product valve rises to positive voltage from negative voltage; Can fully verify the reliable trigger of valve and the correctness that valve is got the energy Unit Design.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910243597 CN101776733B (en) | 2009-12-29 | 2009-12-29 | Service test method of minimum trigger angle of DC converter valve with asymmetric voltage |
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| CN 200910243597 CN101776733B (en) | 2009-12-29 | 2009-12-29 | Service test method of minimum trigger angle of DC converter valve with asymmetric voltage |
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| CN101776733A CN101776733A (en) | 2010-07-14 |
| CN101776733B true CN101776733B (en) | 2013-03-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486526B (en) * | 2010-12-01 | 2015-09-23 | 中国电力科学研究院 | A kind of minimum triggering angle |
| CN102486525B (en) * | 2010-12-01 | 2015-11-25 | 中国电力科学研究院 | A kind of intermittent direct current running test method for high-voltage direct current power transmission converter valve |
| CN102486499A (en) * | 2010-12-01 | 2012-06-06 | 中国电力科学研究院 | High-voltage direct current power transmission conversion valve minimum turn-off angle operation test method |
| CN102486500B (en) * | 2010-12-01 | 2014-10-01 | 中国电力科学研究院 | Impulse voltage compounded high-voltage direct-current power transmission converter valve fault current test device |
| CN102486527B (en) * | 2010-12-01 | 2015-09-23 | 中国电力科学研究院 | A kind of composite test method of high-voltage direct current transmission converter valve |
| CN105021930A (en) * | 2015-08-06 | 2015-11-04 | 许继电气股份有限公司 | Converter valve reverse recovery phase protective characteristic test method and corresponding system |
| CN111913067A (en) * | 2020-07-31 | 2020-11-10 | 中国南方电网有限责任公司超高压输电公司广州局 | Method, system, device and medium for measuring operation parameters of three-phase asymmetric converter |
| CN112230133B (en) * | 2020-08-26 | 2024-04-05 | 中国科学院电工研究所 | Test circuit, system, method and device of current source type active commutation valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3701938A (en) * | 1971-08-09 | 1972-10-31 | Gen Electric | Minimum valve voltage method and control apparatus for hvdc power converters |
| DE10245293A1 (en) * | 2002-09-27 | 2004-04-08 | Siemens Ag | Valve triggering method for triggering a turn-off power converter valve uses a number of cycles in series applying two or more |
| CN101149421A (en) * | 2007-11-09 | 2008-03-26 | 中国电力科学研究院 | Direct current converter valve low voltage parameter operation test method |
| CN101187690A (en) * | 2007-11-28 | 2008-05-28 | 中国电力科学研究院 | DC converter valve restoration period transient forward voltage test method |
-
2009
- 2009-12-29 CN CN 200910243597 patent/CN101776733B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3701938A (en) * | 1971-08-09 | 1972-10-31 | Gen Electric | Minimum valve voltage method and control apparatus for hvdc power converters |
| DE10245293A1 (en) * | 2002-09-27 | 2004-04-08 | Siemens Ag | Valve triggering method for triggering a turn-off power converter valve uses a number of cycles in series applying two or more |
| CN101149421A (en) * | 2007-11-09 | 2008-03-26 | 中国电力科学研究院 | Direct current converter valve low voltage parameter operation test method |
| CN101187690A (en) * | 2007-11-28 | 2008-05-28 | 中国电力科学研究院 | DC converter valve restoration period transient forward voltage test method |
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