CN105021930A - Converter valve reverse recovery phase protective characteristic test method and corresponding system - Google Patents
Converter valve reverse recovery phase protective characteristic test method and corresponding system Download PDFInfo
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- CN105021930A CN105021930A CN201510478771.6A CN201510478771A CN105021930A CN 105021930 A CN105021930 A CN 105021930A CN 201510478771 A CN201510478771 A CN 201510478771A CN 105021930 A CN105021930 A CN 105021930A
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Abstract
The invention relates to a converter valve reverse recovery phase protective characteristic test method and a corresponding system. The method comprises the following steps that (1) AC voltage is applied to the two ends of a converter valve component so as to simulate the actual operation condition of the converter valve; (2) and when the converter valve component is in a reverse recovery phase protective interval, forward impulse voltage is superposed with AC voltage to be applied to the converter valve component together; voltage waveform of the converter valve is observed; when forward impulse voltage of the converter valve drops, response of the reverse recovery phase protective characteristic of the converter valve component is judged to be correct; and response is incorrect under other conditions. Testing of forward impulse voltage superposed with AC voltage is performed on the converter valve component in the reverse recovery phase protective interval and out of the reverse recovery phase protective interval respectively, correctness of response of the reverse recovery phase protective characteristic of the converter valve component is judged and a situation that the thyristor level of the converter valve component has the condition of bearing forward impulse voltage is verified, and thus reliability of actual operation of the converter valve product is enhanced.
Description
Technical field
The invention belongs to high-voltage dc transmission electrical domain, be specifically related to the system of a kind of converter valve recovery protection firing characteristic test method and correspondence.
Background technology
HVDC (High Voltage Direct Current) transmission system is widely applied in China, and the converter valve of high-power thyristor devices in series is the nucleus equipment of high voltage direct current transmission project current conversion station, and its reliable and stable operation has vital effect to whole system.The core component of converter valve is thyristor, and thyristor cost is high, and function is important, and usual individual system needs thousands of thyristors.Therefore, to the monitoring of thyristor running status and protection very necessary.
Thyristor only just can be triggered when applying forward voltage and gate pole applies trigger pulse; Meanwhile, due to the characteristic that there is one-way conduction, can not independently turn off, often need to reduce auxiliary its gradually by applying negative voltage or electric current and turn off.And, due to the decision of semiconductor devices self character, the healing of self charge carrier needs the regular hour, so the reliable turn-off of thyristor needs a time interval, because the thyristor product performance of different manufacturers is different, its reliable turn-off time is approximately the 1.2ms even longer time.This interval is called as reverse recovery.
The protection of reverse recovery has a very important role for the safety of converter valve and even whole current conversion station system, stable operation.Thyristor is in extinguishing process (i.e. reversely restoring process), and the equipment failure in current conversion station or certain operations may cause occurring very steep forward transient voltage at thyristor two ends.When bearing forward blocking voltage after thyristor reliable turn-off, it is very high that it bears reverse recovery ability, and in reverse recovery, due to the existence of reverse recovery electric charge, the reverse recovery ability to bear of thyristor greatly reduces, huge overvoltage energy will make thyristor conducting again, and energy product party huge in short-term makes thyristor thermal breakdown.The more important thing is, in DC engineering, each inverter unit is the Thyristors in series of tens or even up to a hundred, and when wherein one or several thyristors break down, remaining series thyristor can produce chain fault actions due to voltage protection.Therefore; for being widely used in now extra-high voltage direct-current transmission engineering; all require to possess recovery protection firing function using thyristor as the converter valve components of change of current device; the unusual fluctuations of external signal are detected in time by using standby detection and defencive function, and by protecting and reporting to the police, even make operational system measure of tripping reach the object of all thyristors in protection transverter.
The actual operating mode of simulation converter valve, and then converter valve recovery protection firing characteristic is tested, be the reliable and effective means verifying before converter valve is dispatched from the factory whether its recovery protection firing function normally works.And at present, in prior art, also do not have a set of effective, converter valve recovery protection firing characteristic test method of standard and the test macro of correspondence to test its recovery protection firing characteristic before converter valve product export.
Summary of the invention
The object of this invention is to provide the system of a kind of converter valve recovery protection firing characteristic test method and correspondence, there is no method of testing and corresponding test macro before converter valve product export to the problem that converter valve recovery protection firing characteristic is tested in order to solve in prior art.
For achieving the above object, the solution of the present invention comprises:
A kind of converter valve recovery protection firing characteristic test method, comprises the following steps:
(1) alternating voltage is applied at the two ends of converter valve components, the actual operating mode of simulation converter valve;
(2) when converter valve components is in recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve; When the forward impact Voltage Drop of converter valve, judge that the response of the recovery protection firing characteristic of converter valve components is correct; In other situations, respond incorrect.
Also comprise step (3): when converter valve components is in outside recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve: when output waveform is the waveform of the complete forward impact voltage of alternating voltage and superposition, the thyristor level of checking converter valve components bears the normal of forward impact voltage.
By regulating the applying moment of forward impact voltage, different converter valve components is tested.
A kind of converter valve recovery protection firing specialty systemizations, comprises AC power, surge voltage generating means, control module, auxiliary electron switch and converter valve components; Described converter valve components comprises input end and output terminal, and described stream valve module input end connects AC power, for simulating the actual operating mode of converter valve; Described stream valve module output terminal is for connecting waveform acquisition device; Described surge voltage generating means connects converter valve components input end by auxiliary electron switch; Described control module control linkage auxiliary electron switch, for controlling surge voltage to be applied to converter valve components; Described control module is by Fiber connection converter valve components.
The invention has the beneficial effects as follows: the actual operating mode of analog DC transmission system converter valve; by carrying out the test of forward impact voltage superposition alternating voltage to the converter valve components in recovery protection firing interval and outside recovery protection firing interval respectively, and observe the voltage waveform of converter valve by the wave shape display system of converter valve components.Judge that whether the response of the recovery protection firing characteristic of converter valve components is correct, the thyristor level of checking converter valve components possesses the operating mode of bearing forward impact voltage.And then substantially increase the reliability of converter valve product actual motion.
Accompanying drawing explanation
Fig. 1 is the structural representation of converter valve recovery protection firing characteristic test system embodiment of the present invention;
Fig. 2 is the sequential control figure of converter valve recovery protection firing characteristic test system embodiment of the present invention.
Embodiment
Converter valve recovery protection firing characteristic test method embodiment
The converter valve recovery protection firing characteristic test method of the embodiment of the present invention comprises the following steps:
(1) alternating voltage is applied at the two ends of converter valve components, the actual operating mode of simulation converter valve;
Alternating voltage is applied, the actual operating mode of analog DC transmission system converter valve at the two ends of converter valve thyristor level.After converter valve is powered, send IP signal to control module, when control module detects the IP signal that converter valve beams back, send FP signal at the fixed angle α place of alternating voltage phase, trigger the thyristor level in converter valve components.
(2) when converter valve components is in recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve; Judge that whether the response of the recovery protection firing characteristic of converter valve components is correct;
When converter valve components is in recovery protection firing interval; control module sends control signal F1 to auxiliary electron switch; by auxiliary electron switch, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; according to the requirement of the recovery protection firing characteristic of converter valve components, forward impact voltage magnitude and voltage build-up rate can be changed.And the voltage waveform of converter valve is observed by the wave shape display system of converter valve components.If control module detects that the amplitude of this forward impact voltage and voltage build-up rate have exceeded the limits value testing converter valve components; so control module is protected thyristor level by triggering converter valve components, limits and the energy that brings of superpotential of releasing within the scope of safe voltage to the superpotential in converter valve components.Now, just can be observed by the wave shape display system of converter valve components: when the forward impact voltage rise being applied to converter valve is to certain amplitude, the waveform of forward impact Voltage Drop, illustrates that the recovery protection firing characteristic response of this converter valve components is correct; Otherwise the recovery protection firing characteristic response of this converter valve components is incorrect.
(3) when converter valve components is in outside recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve, the thyristor level of checking converter valve components bears the operating mode of forward impact voltage.
When converter valve components is in outside recovery protection firing interval; control module sends control signal F1 to auxiliary electron switch; by auxiliary electron switch, forward impact voltage superposition alternating voltage is applied in converter valve components jointly, and observes the voltage waveform of converter valve by the wave shape display system of converter valve components.During owing to being in outside recovery protection firing interval in converter valve components; the ability of bearing forward impact voltage has been possessed concerning converter valve components; therefore; just can observe by the wave shape display system of converter valve components waveform converter valve exchanging the complete forward impact voltage of voltage superposition, and then the thyristor level demonstrating converter valve components possesses the operating mode of bearing forward impact voltage.
In the above-described embodiments, by regulating the applying moment of forward impact voltage to test different converter valve components.
In the above-described embodiments, the operating mode of forward impact voltage is born by the thyristor level of step (3) checking converter valve components; As other embodiments, after having carried out step (2), just terminate the test to converter valve recovery protection firing characteristic.
Converter valve recovery protection firing characteristic test system embodiment
As shown in Figure 1, the converter valve recovery protection firing specialty systemizations of the embodiment of the present invention comprises AC power, surge voltage generating means, control module CN, auxiliary electron switch and converter valve components THY.
AC power connects surge voltage generating means, control module CN and auxiliary electron switch respectively, for powering to surge voltage generating means, and provides AC synchronizing voltage to control module CN and auxiliary electron switch; Surge voltage generating means connects converter valve components THY, for providing surge voltage HV to converter valve components THY by auxiliary electron switch; Control module CN control linkage auxiliary electron switch, is applied to converter valve components THY two ends for controlling auxiliary electron switch by surge voltage HV; Control module CN is by Fiber connection converter valve components THY; For sending FP control signal and receiving converter valve IP signal.
Direct-current transmission converter valve protection feature of (t3-t4) outside (t2-t3) and recovery protection firing interval in recovery protection firing interval is verified respectively by 2 test processs.Concrete test implementation process is as follows:
First, charged to forward surge voltage generating means by AC power, meanwhile, AC supply voltage is as AC synchronizing signal voltage, one road AC synchronizing voltage 1 is applied on converter valve components THY by auxiliary electron switch, the actual operating mode of analog DC transmission system converter valve.Another road AC synchronizing voltage 2 provides power supply to control module CN.After converter valve is powered, send IP signal 1 to control module, control module detects the IP signal 1 that converter valve is beamed back, FP signal is sent in the t1 moment (the fixed angle α place of alternating voltage phase), trigger converter valve components, control module CN starts to start reverse recovery test sequence in this ac cycle, and as shown in Figure 2, the valid interval of this sequential is in the t2-t4 time.
Secondly, be engraved in t2-t3 (in converter valve recovery protection firing) interval when adjusting the applying of forward impact voltage HV by the time-delay mechanism on control module CN, forward impact voltage generation circuit charging complete by the time.When the phase place of alternating voltage is greater than 180 ° (in converter valve, voltage is negative value), control module CN can receive the IP signal 2 that converter valve components sends.Now control module CN starts reverse recovery time ordered interval; and send control signal F1 to auxiliary electron switch; by auxiliary electron switch, forward impact voltage HV is superposed AC synchronizing voltage 1 to be jointly applied on converter valve components THY; according to the requirement of the recovery protection firing characteristic of converter valve components, forward impact voltage magnitude and voltage build-up rate can be changed.And the voltage waveform of converter valve is observed by the wave shape display system of converter valve components THY.If control module CN detects that the amplitude of forward impact voltage HV and voltage build-up rate have exceeded the limits value testing converter valve components THY; so control module CN protects thyristor level by triggering converter valve components THY, limits and the energy that brings of superpotential of releasing within the scope of safe voltage to the superpotential on converter valve components THY.Now, just can be observed by the wave shape display system of converter valve components THY: when the forward impact voltage rise being applied to converter valve is to certain amplitude, the waveform of forward impact Voltage Drop, illustrates that the recovery protection firing characteristic response of this converter valve components is correct; Otherwise the recovery protection firing characteristic response of this converter valve components is incorrect.
Then; be engraved in t3-t4 (converter valve recovery protection firing is outer) interval when adjusting the applying of forward impact voltage by the time-delay mechanism on control module CN; by the time after the charging complete of forward impact voltage generation circuit; control module CN sends control signal F1 to auxiliary electron switch; by auxiliary electron switch, forward impact voltage HV is superposed AC synchronizing voltage 1 to be jointly applied on converter valve components THY, and observe the voltage waveform of converter valve by the wave shape display system of converter valve components THY.Because t3-t4 interval has possessed the ability of bearing forward impact voltage concerning converter valve components.Waveform converter valve exchanging the complete forward impact voltage of voltage superposition just can be observed by the measurement mechanism on converter valve components THY.And then the thyristor level demonstrating converter valve components has possessed the operating mode of bearing forward impact voltage.
By above-mentioned twice independently test process, demonstrate the characteristic of in the reverse recovery of Thyristor (t3-t4) outside (t2-t3) and reverse recovery interval respectively, and demonstrate when converter valve components bears forward overvoltage within these two time periods and whether can work normally.
The applying moment of forward impact voltage is regulated, to test different converter valve components by control module CN.
In the above-described embodiments, described AC power supplies electrical connection surge voltage generating means and control module CN respectively, for powering to surge voltage generating means and control module CN.As other embodiments, described electrical connection surge voltage generating means and control module CN adopt other Power supplies.
In the above-described embodiments, described AC power connects converter valve components THY by auxiliary electron switch.As other embodiments, described AC power directly connects converter valve components THY.
Claims (4)
1. a converter valve recovery protection firing characteristic test method, is characterized in that: comprise the following steps:
(1) alternating voltage is applied at the two ends of converter valve components, the actual operating mode of simulation converter valve;
(2) when converter valve components is in recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve: when the forward impact Voltage Drop of converter valve, judge that the response of the recovery protection firing characteristic of converter valve components is correct; In other situations, judge that the response of the recovery protection firing characteristic of converter valve components is incorrect.
2. converter valve recovery protection firing characteristic test method according to claim 1, it is characterized in that: also comprise step (3): when converter valve components is in outside recovery protection firing interval, forward impact voltage superposition alternating voltage is applied in converter valve components jointly; The voltage waveform of observation converter valve: when output waveform is the waveform of the complete forward impact voltage of alternating voltage and superposition, the thyristor level of checking converter valve components bears the normal of forward impact voltage.
3. converter valve recovery protection firing characteristic test method according to claim 1, is characterized in that: by regulating the applying moment of forward impact voltage, test different converter valve components.
4. application rights requires the converter valve recovery protection firing specialty systemizations described in 1 or 2, it is characterized in that: comprise AC power, surge voltage generating means, control module, auxiliary electron switch and converter valve components; Described converter valve components comprises input end and output terminal, and described stream valve module input end connects AC power, for simulating the actual operating mode of converter valve; Described stream valve module output terminal is for connecting waveform acquisition device; Described surge voltage generating means connects converter valve components input end by auxiliary electron switch; Described control module control linkage auxiliary electron switch, for controlling surge voltage to be applied to converter valve components; Described control module is by Fiber connection converter valve components.
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| CN201510478771.6A CN105021930A (en) | 2015-08-06 | 2015-08-06 | Converter valve reverse recovery phase protective characteristic test method and corresponding system |
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| CN106707127A (en) * | 2017-03-10 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Industrial frequency impact synthesis test loop for testing thyristor level reverse restoration characteristics |
| CN107765118A (en) * | 2017-09-22 | 2018-03-06 | 许继电气股份有限公司 | A kind of test device and method of light-operated converter valve recovery protection firing unit |
| CN113514744A (en) * | 2021-09-14 | 2021-10-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method and device for determining withstand voltage value of thyristor and storage medium |
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| CN101975916A (en) * | 2010-09-20 | 2011-02-16 | 中国电力科学研究院 | Novel reverse recovery protection test method of thyristor |
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| JP5688434B2 (en) * | 2013-04-15 | 2015-03-25 | 韓国産業銀行Ｔｈｅ Ｋｏｒｅａ Ｄｅｖｅｌｏｐｍｅｎｔ Ｂａｎｋ | Multi-mode TOV test system for surge protector |
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| JP5465853B2 (en) * | 2008-08-21 | 2014-04-09 | 株式会社関電工 | Protective relay protection coordination test method and test apparatus used therefor |
| CN101776733A (en) * | 2009-12-29 | 2010-07-14 | 中国电力科学研究院 | Service test method of minimum trigger angle of DC converter valve with asymmetric voltage |
| CN101975916A (en) * | 2010-09-20 | 2011-02-16 | 中国电力科学研究院 | Novel reverse recovery protection test method of thyristor |
| JP5688434B2 (en) * | 2013-04-15 | 2015-03-25 | 韓国産業銀行Ｔｈｅ Ｋｏｒｅａ Ｄｅｖｅｌｏｐｍｅｎｔ Ｂａｎｋ | Multi-mode TOV test system for surge protector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106707127A (en) * | 2017-03-10 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Industrial frequency impact synthesis test loop for testing thyristor level reverse restoration characteristics |
| CN107765118A (en) * | 2017-09-22 | 2018-03-06 | 许继电气股份有限公司 | A kind of test device and method of light-operated converter valve recovery protection firing unit |
| CN107765118B (en) * | 2017-09-22 | 2020-02-21 | 许继电气股份有限公司 | Testing device and method for reverse recovery period protection unit of light-operated converter valve |
| CN113514744A (en) * | 2021-09-14 | 2021-10-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method and device for determining withstand voltage value of thyristor and storage medium |
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Application publication date: 20151104 |