CN102013793A - Novel method for triggering thyristor for converter valve module test - Google Patents
Novel method for triggering thyristor for converter valve module test Download PDFInfo
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Abstract
The invention relates to the field of power system devices, in particular to a novel method for triggering thyristor for converter valve module test. The triggering method adopts a digital triggering technology, and VBE (Valve-Based Equipment) receives a synchronous signal and can generate a triggering coded pulse with any phase angle which can be conveniently and flexibly adjusted according to the synchronous signal. The reliable triggering of a thyristor under a low voltage is a basis for ensuring the normal and reliable operation of a converter valve and needs two conditions: (1) the voltage difference between the anode and the cathode of the thyristor is a positive voltage, and (2) the thyristor can be triggered and conducted only when the triggering pulse is received. The triggering pulse for reliably triggering the thyristor under a low voltage is provided by TE (Thyristor Electronics), a low-voltage circuit provides the TE with energy for normal work, the TE receives and decodes the triggering coded pulse from the VBE and then provides a voltage and a current to trigger and conduct the thyristor through a power amplifier so as to trigger and conduct the thyristor.
Description
Technical field
The present invention relates to the electric power system devices field, be specifically related to a kind of novel converter valve module test thyristor trigger method.
Background technology
Thyristor is as the most important components and parts of converter valve, it is the key point that guarantees the normal operation of converter valve that its reliability triggers, in the converter valve normal course of operation, the various interference that can be come from the outside, this interference may exert an influence to the circuits for triggering of thyristor, can not trigger thyristor normally thereby cause.Direct-current transmission converter valve is to be composed in series by many groups thyristor, if because thyristor can not the triggered as normal conducting, then can cause voltage to be shared on remaining series thyristor, then can cause these thyristor overvoltage, may cause damaging thyristor when serious, this shows that the triggering thyristor of normal reliable seems particularly important.
Under traditional triggering mode, the thyristor triggering and conducting needs certain voltage, current strength and pulsewidth, need certain analog circuit and realize, under the running environment of direct-current transmission converter valve, various interference may cause the reliable triggering of thyristor undesired etc.
This patent is exactly to propose a kind of novel method for designing under such background condition, and adopts triggering coded pulse and actual triggering signal to isolate by photoelectricity, thereby guarantees that circuits for triggering are not subjected to the influence of various interference.
Patent CN95207179.7 has described a kind of design of intelligent thyristor trigger board, this patent characteristic be core with the microprocessor main frame, configuration multiway analog switch amount, has angle of flow testing circuit, have operation and malfunction indicator lamp, its shortcoming is that crucial Technology Need with the core of microprocessor as whole system, has increased complexity, triggering technique need detect the angle of flow, can not be as converter valve module test triggering technique.The present invention does not need to use microprocessor, directly utilizes the synchronizing signal of no phase shift, utilizes synchronizing signal directly to produce the triggering coded pulse according to the trigger angle of test needs, produces trigger impulse by TE, thereby triggers thyristor.
Summary of the invention
The purpose of this invention is to provide a kind of novel converter valve module test thyristor triggering technique, different with traditional thyristor triggering technique, this triggering technique adopts digital triggering technique, VBE receives the triggering coded pulse that can produce the arbitrary phase angle after the synchronizing signal, and this phase angle can be according to the convenient, flexible adjustment of synchronizing signal.The triggering of the reliability of thyristor is the basis that guarantees the operation of converter valve normal reliable under the low-voltage, and thyristor reliably triggers two conditions that need, the one, and thyristor must be under the situation of malleation at anode and cathodic electricity pressure reduction, receiving trigger impulse could triggering and conducting.In order to send trigger impulse in guaranteeing between zone of positive pressure, the synchronous voltage signal of low-voltage circuit need be provided, this synchronous voltage signal is sent to valve base electronic unit (VBE), provides the trigger impulse of TE plate, thereby send trigger impulse to the TE plate in guaranteeing between the thyristor zone of positive pressure by VBE.On the other hand, the trigger impulse that the thyristor reliability triggers under the low-voltage needs thyristor electronic unit (TE) to provide, low-voltage circuit provides the energy of TE operate as normal, TE accepts the triggering coded pulse from VBE simultaneously, TE decodes after receiving trigger impulse, the voltage and current of thyristor triggered as normal conducting is provided by power amplifying device then, thereby the trigger impulse of thyristor triggering and conducting is provided.
A kind of novel converter valve module test thyristor trigger method that the present invention proposes comprises:
(1) the used hookup of this method comprises AC system, zero cross detection circuit, filter circuit, synchronizing signal, DSP-CPLD master control system, valve base electronic device VBE and thyristor valve, described AC system is meant the 220V AC power, by the AC/AC change-over circuit, but the 220V alternating voltage is converted to the measuring-signal of 5V, again by the filtering modulate circuit, this signal is nursed one's health, make that its waveform is level and smooth, pass through zero cross detection circuit again, be converted into and the synchronous square-wave signal of 5V signal, as the control benchmark of DSP-CPLD master control system;
(2) described AC/AC modular converter is the signal that the ac supply signal of 220V is converted to 5V by current mode voltage sensor SPT504F3, signal after the conversion and former power supply do not have the transfer on the phase place, this transducer need tolerate the above alternating voltage of 1000Vpk, prevent to damage transducer owing to overvoltage appears in AC system, the voltage signal peak value after the conversion is 5V;
(3) described filter circuit, it is a second-order low-pass filter, cut-off frequency is 150Hz, in can filtered signal greater than the AC signal more than the 150Hz, because the control benchmark of system requires very strict, the slight error of signal phase just can cause the migration constantly of setting out, and this filter makes its phase deviation be controlled in 0.5 ° by the transfer function of system is set;
(4) its high level of described synchronous square-wave signal is 5V, and low level is 0V, and is identical with AC signal on phase place, no phase deviation;
(5) described DSP-CPLD master control system is by the trigger angle of computing system, sending pulse duration according to synchronizing signal to valve base electronic device VBE is 120 ° triggering signal, this triggering signal is the trigger impulse that sends for 6 pulse conversion bridges, phase deviation between signal and the signal is 60 °, valve base electronic device VBE rises along producing triggering signal thereon according to this trigger angle signal, produce pick-off signal at its trailing edge, and send it to thyristor electronic equipment TE, thereby triggering thyristor, the converters of 12 pulsation will produce 30 ° phase deviation in the converter transformer side, and control signal is consistent with the frequency of 6 pulse conversion bridges.
The advantage of technical solution of the present invention is:
1, utilizes synchronous signal circuit,, between zone of positive pressure, produce trigger impulse, guarantee the reliable conducting of thyristor by detecting forward voltage.
2, connect by optical fiber between VBE and the TE, can under the normal operating condition of simulation converter valve, test, test true and reliablely, and can play the effect disturbed of preventing.
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 to provide description of drawings related to the present invention below:
Fig. 1 is the schematic diagram that thyristor low pressure of the present invention triggers test method.
Fig. 2 is the triggering sequential chart of thyristor valve of the present invention
Fig. 3 is the trigger voltage test waveform of thyristor valve
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Referring to accompanying drawing 1,, by voltage zero-crossing detection circuit, detect the voltage that is applied on the thyristor, thereby produce synchronizing signal in order to guarantee to send trigger impulse during in malleation at thyristor anode and negative electrode.This synchronizing signal is sent to VBE, VBE produces the triggering coded pulse after receiving this synchronizing signal, this triggering coded pulse is transmitted through the fiber to TE, TE decodes after receiving this pulse, and produce by power amplifying device and can make the electric current and voltage of thyristor triggering and conducting, and be sent to thyristor, thereby conducting thyristor.
In this design, circuit for generating synchronous signals and VBE are in the control room, be in electronegative potential and converter valve running environment and isolate, TE is installed on the converter valve, be in high potential, the triggering coded pulse that VBE produces is sent to TE by optical fiber, by this method, can carry out low-voltage to thyristor under the actual motion environment of thyristor and trigger test, be beneficial to photoelectricity and isolate the environmental interference that can prevent converter valve effectively, utilize circuit for generating synchronous signals can guarantee the thyristor conducting accurately.
Referring to accompanying drawing 2, be the control timing figure of DSP-CPLD master control system, sys is the synchronous base of system among the figure, the DSP-CPLD master control system is by the trigger angle of computing system, send the triggering signal of Vab, Vbc, Vac, Vca, each valve brachium pontis of Vba, Vcb to VBE according to synchronizing signal, its deration of signal is 120 °, differs about 6.7ms on the time.Phase deviation between the triggering signal of brachium pontis is 60 °, differs about 3.35ms on the time.VBE rises along producing triggering signal thereon according to this trigger angle signal, produces pick-off signal at its trailing edge, and sends it to TE, thereby trigger thyristor.The converter of 12 pulsation becomes the phase deviation that side will produce 30 ° in the change of current, and control signal is consistent with 6 fluctuation bridges.
Referring to accompanying drawing 3, B passage waveform be the test voltage waveform of TE thyristor conducting after receiving trigger impulse.To be TE receiving the delivery time that interval wherein rising edge is represented the thyristor pulse that touches that produces after triggering coded pulse to the waveform of A channel.As seen from the figure, after thyristor valve is receiving trigger impulse, promptly trigger thyristor, the voltage at thyristor two ends will show that thyristor is triggered for zero.
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, only enclosed patent claims of scope of the present invention and coordinate restriction thereof.
Claims (1)
1. a novel converter valve module is tested thyristor trigger method, it is characterized in that:
(1) the used hookup of this method comprises AC system, zero cross detection circuit, filter circuit, synchronizing signal, DSP-CPLD master control system, valve base electronic device VBE and thyristor valve, and described AC system is meant the 220V AC power.By the AC/AC change-over circuit, but the 220V alternating voltage is converted to the measuring-signal of 5V, again by the filtering modulate circuit, this signal is nursed one's health, make that its waveform is level and smooth, by zero cross detection circuit, be converted into and the synchronous square-wave signal of 5V signal, again as the control benchmark of DSP-CPLD master control system;
(2) described AC/AC modular converter is the signal that the ac supply signal of 220V is converted to 5V by current mode voltage sensor SPT504F3, signal after the conversion and former power supply do not have the transfer on the phase place, this transducer need tolerate the above alternating voltage of 1000Vpk, prevent to damage transducer owing to overvoltage appears in AC system, the voltage signal peak value after the conversion is 5V;
(3) described filter circuit, it is a second-order low-pass filter, cut-off frequency is 150Hz, in can filtered signal greater than the AC signal more than the 150Hz, because the control benchmark of system requires very strict, the slight error of signal phase just can cause the migration constantly of setting out, and this filter makes its phase deviation be controlled in 0.5 ° by the transfer function of system is set;
(4) its high level of described synchronous square-wave signal is 5V, and low level is 0V, and is identical with AC signal on phase place, no phase deviation;
(5) described DSP-CPLD master control system is by the trigger angle of computing system, sending pulse duration according to synchronizing signal to valve base electronic device VBE is 120 ° triggering signal, this triggering signal is the trigger impulse that sends for 6 pulse conversion bridges, phase deviation between signal and the signal is 60 °, valve base electronic device VBE rises along producing triggering signal thereon according to this trigger angle signal, produce pick-off signal at its trailing edge, and send it to thyristor electronic equipment TE, thereby triggering thyristor, the converters of 12 pulsation will produce 30 ° phase deviation in the converter transformer side, and control signal is consistent with the frequency of 6 pulse conversion bridges.
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| CN201010512409.3A CN102013793B (en) | 2010-10-12 | 2010-10-12 | Method for triggering thyristor for converter valve module test |
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| CN201010512409.3A CN102013793B (en) | 2010-10-12 | 2010-10-12 | Method for triggering thyristor for converter valve module test |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941624A (en) * | 2014-04-29 | 2014-07-23 | 中国南方电网有限责任公司超高压输电公司广州局 | Operation simulation and training platform for VBE system of high-voltage direct current transmission converter valve |
| CN103941176A (en) * | 2014-04-29 | 2014-07-23 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault detection system for VBE system device of high-voltage direct current transmission converter valve |
| CN105717846A (en) * | 2016-04-13 | 2016-06-29 | 上海电器科学研究院 | Electronic type intelligent precise angle selective control device |
| CN105716812A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Testing apparatus for anti-vibration performance of converter valve, and testing method thereof |
| CN105896939A (en) * | 2016-06-24 | 2016-08-24 | 南京工程学院 | Digital thyristor trigger method |
| CN106973027A (en) * | 2017-03-30 | 2017-07-21 | 大唐联诚信息系统技术有限公司 | A kind of generation method of synchronizing signal, analysis method and device |
| CN107147382A (en) * | 2017-04-28 | 2017-09-08 | 麦克维尔空调制冷(武汉)有限公司 | The thyristor voltage regulation circuit PWM driving method controlled based on DSP |
| CN104155554B (en) * | 2014-08-21 | 2017-11-07 | 国家电网公司 | A kind of low pressure physical valve model for simulating thyristor valve |
| CN111273096A (en) * | 2018-12-04 | 2020-06-12 | 西安高压电器研究院有限责任公司 | Electric test device of thyristor valve and power supply device thereof |
| CN111308299A (en) * | 2019-11-05 | 2020-06-19 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
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| CN110850209B (en) * | 2019-11-15 | 2022-06-24 | 全球能源互联网研究院有限公司 | Monitoring control device and system for simulating commutation failure test |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941176A (en) * | 2014-04-29 | 2014-07-23 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault detection system for VBE system device of high-voltage direct current transmission converter valve |
| CN103941176B (en) * | 2014-04-29 | 2015-06-17 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault detection system for VBE system device of high-voltage direct current transmission converter valve |
| CN103941624B (en) * | 2014-04-29 | 2015-11-04 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of VBE system simulation operation of high voltage direct current transmission converter valve and training platform |
| CN103941624A (en) * | 2014-04-29 | 2014-07-23 | 中国南方电网有限责任公司超高压输电公司广州局 | Operation simulation and training platform for VBE system of high-voltage direct current transmission converter valve |
| CN104155554B (en) * | 2014-08-21 | 2017-11-07 | 国家电网公司 | A kind of low pressure physical valve model for simulating thyristor valve |
| CN105716812A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Testing apparatus for anti-vibration performance of converter valve, and testing method thereof |
| CN105717846A (en) * | 2016-04-13 | 2016-06-29 | 上海电器科学研究院 | Electronic type intelligent precise angle selective control device |
| CN105717846B (en) * | 2016-04-13 | 2018-08-17 | 上海电器科学研究院 | Electronic type intelligent accurate angle Selection control device |
| CN105896939A (en) * | 2016-06-24 | 2016-08-24 | 南京工程学院 | Digital thyristor trigger method |
| CN106973027B (en) * | 2017-03-30 | 2020-06-16 | 大唐联诚信息系统技术有限公司 | Method and device for generating and analyzing synchronization signal |
| CN106973027A (en) * | 2017-03-30 | 2017-07-21 | 大唐联诚信息系统技术有限公司 | A kind of generation method of synchronizing signal, analysis method and device |
| CN107147382A (en) * | 2017-04-28 | 2017-09-08 | 麦克维尔空调制冷(武汉)有限公司 | The thyristor voltage regulation circuit PWM driving method controlled based on DSP |
| CN107147382B (en) * | 2017-04-28 | 2020-09-22 | 麦克维尔空调制冷(武汉)有限公司 | Thyristor voltage regulating circuit PWM driving method based on DSP control |
| CN111273096A (en) * | 2018-12-04 | 2020-06-12 | 西安高压电器研究院有限责任公司 | Electric test device of thyristor valve and power supply device thereof |
| CN111273096B (en) * | 2018-12-04 | 2021-11-23 | 西安高压电器研究院有限责任公司 | Electric test device of thyristor valve and power supply device thereof |
| CN111308299A (en) * | 2019-11-05 | 2020-06-19 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
| CN111308299B (en) * | 2019-11-05 | 2022-02-15 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Converter valve closed loop test system and method |
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