CN102033197B - Direct current (DC) converter valve non-periodic triggering test method using improved time delay method - Google Patents
Direct current (DC) converter valve non-periodic triggering test method using improved time delay method Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims abstract description 53
- 230000001960 triggered effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
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Abstract
The invention relates to a direct current (DC) converter valve non-periodic triggering test method using an improved time delay method. The method comprises the following steps: selecting an independent delay timer, and placing the independent delay timer in a shielding device; adjusting parameters of a surge generator; supplementing energy to a pole plate of a converter valve, and simultaneously charging the surge generator; surging to trigger ignition, connecting the triggered electric signals of the surge generator to the independent delay timer by an electric/optic conversion-optical fiber-optic/electric conversion device, and using the signals as input signals of the independent delay timer; and when the surge voltage reaches a peak value, triggering a valve to be tested to be switched on. By placing the independent delay timer in the shielding chamber, the technical scheme provided by the invention can ensure the safety of personnel and decrease the number of times for going into/out of the test area, improves the working efficiency and effectively solves the problems of poor on-site time delay interference rejection and inaccurate time delay.
Description
Technical field
Trigger test method the non-periodic that the present invention relates to a kind of field of power electronics, specifically relates to a kind of Nonperiodic trigger test method for direct current converter valve of application enhancements time-delay method.
Background technology
Along with the fast development of UHV (ultra-high voltage) and extra-high voltage direct-current transmission engineering construction, the research of high voltage direct current converter valve test method and the development requirement of test unit strengthen increasingly.The ability of thyristor and auxiliary circuit withstand voltage current stress when the fundamental purpose that triggers single valve non-periodic test is checking thyristor is opened under maximum working voltage and non-periodic stress condition.The critical problem of this test is that thyristor valve is conducting when surge voltage reaches maximal value, could carry out the harshest test to valve, if ON time mistake, test failure.So delay time is accurately vital with stablizing for test, and in test, because voltage is high, electric current is very large, in test loop, electromagnetic interference (EMI) is very serious, and the problem that solves chronotron poor anti jamming capability has become key point and the difficult point of test.
Existing chronotron using method is that chronotron is placed in impact body control box, and control box has function of shielding and ground connection, the input using the trigger pip of impact body as chronotron.All kinds of corrupt practices creep in to apply this kind of time-delay method, as when time delay being set or searching problem, need to enter test block, and enter test block, need to there is safety practice, frequently entering test block has increased the unnecessary time, and sometimes needs to coordinate surge voltage to search problem, and danger is larger; When surge voltage raises, time-delay mechanism antijamming capability variation, time delay is unstable, and voltage is higher, and stability is poorer, causes test failure, and test cannot be proceeded.
Summary of the invention
The object of the present invention is to provide a kind of Nonperiodic trigger test method for direct current converter valve of application enhancements time-delay method, use the method can guarantee personnel's safety and reduce the time of the test block of coming in and going out, increase work efficiency, and effectively solved time delay poor anti jamming capability on the spot and the coarse problem of time delay.
The Nonperiodic trigger test method for direct current converter valve of application enhancements time-delay method provided by the invention, its improvements are, said method comprising the steps of:
A, select independent delay device, independent delay device is positioned in shielding device;
B, adjustment surge generator parameter;
C, give converter valve gate pole plate complementary energy, in the time of complementary energy, to surge generator, charge;
D, impact trigger igniting, and surge generator is triggered to electric signal by change-optical fiber-photoelectric conversion device of electric light, are connected to independent delay device, as the input signal of independent delay device;
The conducting that is triggered when surge voltage reaches peak value of E, test product valve.
In a kind of optimal technical scheme provided by the invention: before on-test, independent delay device 1 is positioned in screened room 2, it is 250us that independent delay device 1 delay value is set, and need not enter test block;
In described step B, adjust surge generator D parameter and comprise wave front resistance R2, wave rear resistance R 1 and the harmonic inductance L that regulates impulse voltage generator D, make test product valve Vt reach voltage peak at 250us (± 5us) two ends;
In described step C, during on-test, give converter valve gate pole plate complementary energy, during complementary energy, killer switch one S1 and killer switch two S2 disconnect, at this moment protective resistance R3 grounding, test product valve Vt and complementary energy power supply T1 serial connection, charge to surge generator D in the time of complementary energy;
In described step D, impact and trigger igniting, and surge generator D is triggered to electric signal by change-optical fiber-photoelectric conversion device of electric light, at this moment electric signal is converted to light signal, utilize optical fiber 3 transmission, convert light signal to electric signal again, be connected to independent delay device 1, as the input signal of independent delay device 1;
In described step e, through 250us, surge voltage reaches voltage peak, simultaneously independent delay device 1 output signal to VBE, VBE sends trigger pip to test product valve Vt, the test product valve Vt conducting that is triggered.
In another kind of optimal technical scheme provided by the invention: described independent delay device 1 delay value is by operating impulse voltage wave head Time dependent, the blasting operation ripple reference waveform wave head time is 250us (± 20%), by adjusting surge generator D parameter, the fixing operation wave-wave head time is 250us (± 5us), and independent delay device 1 delay time is 250us.
Compared with prior art, the beneficial effect of technical scheme provided by the invention is:
The Nonperiodic trigger test method for direct current converter valve of application enhancements time-delay method provided by the invention, independent delay device is put in screened room, and it is convenient to control, and saves time, safe and reliable; Technical scheme provided by the invention converts electrical signals to light signal, utilizes Optical Fiber Transmission, sends in screened room, convert light signal to electric signal again, as the input signal of chronotron, effectively shielded the electromagnetic interference (EMI) in test, antijamming capability is strengthened, and increases the reliability of test; Chronotron can carry out the time delay of delicate level accurately, makes success of the test rate reach 100%.
Accompanying drawing explanation
Fig. 1 is independent delay device using method schematic diagram in triggering test non-periodic.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail with concrete technical scheme.
Be independent delay device using method schematic diagram in triggering test non-periodic as shown in Figure 1, comprise independent delay device 1, screened room 2, optical fiber 3, VBE, impulse voltage generator D, harmonic inductance L, complementary energy capacitor C 2, protective resistance R3, current-limiting resistance R4, RC divider 4, killer switch one S1 and killer switch two S2, complementary energy power supply T1 and test product valve Vt.Surge generator D comprises wave rear resistance R 1, wave front resistance R2, body capacitor C 1 and ignition pill gap 5, body capacitor C 1 and the 1 one end ground connection output of wave rear resistance R, body capacitor C 1 is connected with wave front resistance by ignition pill gap 5, after wave rear resistance R 1 is connected with wave front resistance R2, in wave front resistance R2 one end, export.RC divider 4 comprises resistance R 5, capacitor C 3 and the C4 of series connection successively; Current-limiting resistance R4 and 2 series connection of complementary energy capacitor C; Surge generator D, RC divider 4, current-limiting resistance R4-complementary energy capacitor C 2 branch roads are rear ground connection in parallel successively; When killer switch S1 and S2 disconnect, complementary energy power supply T1, test product valve Vt and protective resistance R3 series connection ground connection; When killer switch S1 and S2 are closed; complementary energy power supply T1 is by killer switch S2 ground connection; test product valve Vt, protective resistance R3 is by killer switch S1 rear and harmonic inductance L series connection impulse voltage generator D in parallel with current-limiting resistance R4-complementary energy capacitor C 2 branch roads and RC divider 4.
Before on-test, independent delay device 1 is positioned in screened room 2, it is 250us that independent delay device 1 delay value is set, and need not enter test block; Adjust surge generator D parameter and comprise wave front resistance R2, wave rear resistance R 1 and the harmonic inductance L that regulates impulse voltage generator D, make test product valve Vt reach voltage peak at 250us (± 5us) two ends.
During on-test, give converter valve gate pole plate complementary energy, during complementary energy, killer switch one S1 and killer switch two S2 disconnect, protective resistance R3 grounding at this moment, and test product valve Vt and complementary energy power supply T1 serial connection, charge to surge generator D in the time of complementary energy; After complementary energy completes, close circuit breaker switch one S1 and killer switch two S2, impact and trigger igniting, and surge generator D is triggered to electric signal by change-optical fiber-photoelectric conversion device of electric light, at this moment electric signal is converted to light signal, utilizes optical fiber 3 transmission, then converts light signal to electric signal, be connected to independent delay device 1, as the input signal of independent delay device 1; Through 250us, surge voltage reaches voltage peak, simultaneously independent delay device 1 output signal to VBE, VBE sends trigger pip to test product valve Vt, the test product valve Vt conducting that is triggered.
Surge generator D produces blasting operation voltage waveform, to 2 chargings of complementary energy capacitor C, when surge voltage reaches maximal value, complementary energy capacitor C 2 charging voltages are the highest, now trigger test product valve Vt conducting, complementary energy capacitor C 2 is released amplified current and is flow through test product valve Vt, thereby the ability of test test product valve Vt withstand voltage electric current, and the moment of triggering valve conducting in this process is most important, it is independent delay device 1 input signal that the surge generator D of take triggers ignition signal, and independent delay device 1 delay time is by the wave head Time dependent of operating impulse voltage.
The advantage of the Nonperiodic trigger test method for direct current converter valve of application enhancements time-delay method provided by the invention is:
1, independent delay device is put in screened room, and it is convenient to control, and saves time, safe and reliable.
2, antijamming capability is strong, and technical scheme provided by the invention converts electrical signals to light signal, utilizes Optical Fiber Transmission, convert light signal to electric signal again, then send into the independent delay device time delay in screened room, effectively shielded the electromagnetic interference (EMI) in test, increased the reliability of test.
3, the time delay of independent delay device is accurate, and test time delay is in delicate level, and chronotron time delay accurately, makes success of the test rate reach 100%.
Finally should be noted that: in conjunction with above-described embodiment, illustrate that technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but among the claim protection domain that these modifications or change are all awaited the reply in application.
Claims (2)
1. a Nonperiodic trigger test method for direct current converter valve for application enhancements time-delay method, said method comprising the steps of:
A, select independent delay device, independent delay device is positioned in shielding device;
B, adjustment impulse voltage generator (D) parameter;
C, give DC converter valve gate pole plate complementary energy, in the time of complementary energy, to impulse voltage generator (D), charge;
D, impact trigger igniting, and impulse voltage generator (D) is triggered to electric signal by change-optical fiber-photoelectric conversion device of electric light, are connected to independent delay device, as the input signal of independent delay device;
The conducting that is triggered when surge voltage reaches peak value of E, DC converter valve;
It is characterized in that: before on-test, independent delay device (1) is positioned in screened room (2), it is 250us that independent delay device (1) delay value is set, and need not enter test block;
In described step B, adjust impulse voltage generator (D) parameter and comprise wave front resistance (R2), wave rear resistance (R1) and the harmonic inductance (L) that regulates impulse voltage generator (D), make DC converter valve (Vt) reach voltage peak at 250us ± 5us two ends;
In described step C, during on-test, give DC converter valve gate pole plate complementary energy, during complementary energy, killer switch one (S1) and killer switch two (S2) all disconnect, at this moment protective resistance (R3) grounding, DC converter valve (Vt) and complementary energy power supply (T1) serial connection, charge to impulse voltage generator (D) in the time of complementary energy;
In described step D, impact and trigger igniting, and impulse voltage generator (D) is triggered to electric signal by change-optical fiber-photoelectric conversion device of electric light, at this moment electric signal is converted to light signal, utilize optical fiber (3) transmission, convert light signal to electric signal again, be connected to independent delay device (1), as the input signal of independent delay device (1);
In described step e, through 250us, surge voltage reaches voltage peak, simultaneously independent delay device (1) output signal to VBE, VBE sends trigger pip to DC converter valve (Vt), DC converter valve (Vt) conducting that is triggered.
2. the Nonperiodic trigger test method for direct current converter valve of a kind of application enhancements time-delay method as claimed in claim 1, it is characterized in that: described independent delay device (1) delay value is by operating impulse voltage wave head Time dependent, the blasting operation ripple reference waveform wave head time is 250us, by adjusting impulse voltage generator (D) parameter, the fixing operation wave-wave head time is 250us ± 5us, and independent delay device (1) delay time is 250us.
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| CN102486516A (en) * | 2010-12-01 | 2012-06-06 | 中国电力科学研究院 | Nonperiodic trigger test method for direct current converter valve |
| CN103033725B (en) * | 2012-12-04 | 2015-04-29 | 国网智能电网研究院 | Impact voltage applying time control system and method thereof |
| CN103048601B (en) * | 2012-12-13 | 2015-06-10 | 国网智能电网研究院 | Testing method and device for non-periodically triggering parallel capacitors by thyristor |
| CN103048602B (en) * | 2012-12-13 | 2015-07-22 | 国网智能电网研究院 | Turn-on characteristic testing apparatus of large power semiconductor device |
| CN103675660B (en) * | 2013-11-27 | 2016-04-06 | 中国西电电气股份有限公司 | Extra-high-voltage converter valve recovery period transient forward voltage test loop and test method thereof |
| CN107294519B (en) * | 2017-05-08 | 2020-12-18 | 南京南瑞继保电气有限公司 | Signal distribution processing method and device |
| CN107957536B (en) * | 2017-10-16 | 2019-12-10 | 许继电气股份有限公司 | Non-periodic trigger test synchronization device and non-periodic trigger test system for direct-current transmission converter valve |
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| DE2736783C3 (en) * | 1977-08-16 | 1980-05-08 | Danfoss A/S, Nordborg (Daenemark) | Limit value reporting device for alternating signals |
| US5386542A (en) * | 1991-10-31 | 1995-01-31 | International Business Machines Corporation | System for generating a time reference value in the MAC layer of an ISO/OSI communications model among a plurality of nodes |
| CN201096849Y (en) * | 2007-09-18 | 2008-08-06 | 中国电力科学研究院 | A high level voltage measuring system for high-voltage DC transmission conversion valve |
| CN101800482B (en) * | 2010-02-11 | 2012-09-05 | 株洲南车时代电气股份有限公司 | Dephasing superpower thyristor pulse trigger |
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