CN102709886B - Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set - Google Patents
Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set Download PDFInfo
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- CN102709886B CN102709886B CN201210190097.8A CN201210190097A CN102709886B CN 102709886 B CN102709886 B CN 102709886B CN 201210190097 A CN201210190097 A CN 201210190097A CN 102709886 B CN102709886 B CN 102709886B
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Abstract
The invention discloses a status monitoring and overvoltage protection system of a high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set, which comprises a main control device, a static voltage-equalizing and information acquisition module, a thyristor working status monitoring module, an AC voltage acquisition module, an overvoltage judging and signal expanding module, a forced triggering pulse string generating module, a high-level energy-acquiring and 1+1 redundant power supply, and a thyristor triggering module, wherein the static voltage-equalizing and information acquisition module is used for extracting AC voltage information and bi-directional overvoltage signals; the thyristor working status monitoring module is used for monitoring AC voltage signals of the TCR thyristor valve gate set; the AC voltage acquisition module is used for monitoring the bi-directional overvoltage information of the TCR thyristor valve gate set; the overvoltage judging and signal expanding module is used for carrying out overvoltage judgment according to the bi-directional overvoltage information; and the high-level energy-acquiring and 1+1 redundant power supply is used for controlling conduction and conduction angle of the TCR thyristor valve gate set. The status monitoring and overvoltage protection system disclosed by the invention is simple and reliable and low in cost and can be used for overvoltage protection on the high-voltage TCR thyristor valve gate set and real-time detection on the normal working status of the high-voltage TCR thyristor valve gate set.
Description
Technical field
The invention belongs to electric and electronic technical field; more specifically relate to condition monitoring and the overvoltage protective system of a kind of high pressure TCR (Thyristor ControlledReactor) thyristor valve group, be applicable to condition monitoring and the overvoltage protection of TCR thyristor valve group.
Background technology
Modern society be unable to do without flexible AC transmitting system, and SVC (Static Vat Compensator) and SVG (StaticVar Generator) are basic technology and the key equipment of flexible AC transmitting system.High pressure TCR (Thyristor ControlledReactor) is the core apparatus of SVC, by multistage anti-parallel thyristor, (thyristor valve group) thyristor valve string and inductance in series is composed in series.Conventionally, control its size to electrical network injecting reactive current by the angle of flow of controlling thyristor valve group.In order to ensure that TCR works reliably, it is crucial that the overvoltage fault that the operating state of thyristor valve group is implemented to monitor in real time and may occur thyristor valve group is implemented protection reliably.
Traditional high pressure TCR adopts the overvoltage protection of breakdown diode BOD as thyristor valve group more; principle is to utilize its distinctive voltage-current characteristic; breakdown diode BOD is serially connected among alternating voltage sampling circuit; when the improper rising of high pressure TCR thyristor valve group both end voltage; reach turning back when voltage of BOD; BOD moment completes the saltus step from high-impedance state to low resistive state; utilize a pair of antiparallel thyristor in the vent discharge diffluence forced trigger thyristor valve group producing; make its conducting, avoid it to bear overvoltage and damage.
Sampling BOD as the advantage of the overvoltage protection of thyristor valve group is, the voltage of turning back that causes protection action is accurate, and the thyristor of the vent discharge diffluence forced-triggered producing can utilize BOD to turn back time in overvoltage condition.Its shortcoming is that the inconvenience of protection operation voltage is adjusted, and BOD is expensive, and the quantity in addition using in equipment is many, and delivery cycle is long, has increased the cost of equipment.In addition, inconvenience takes into account the monitoring to thyristor valve group normal operating conditions, makes monitoring and the overvoltage protective system more complicated of high pressure TCR high-pressure thyristor valve.
In order to overcome the above-mentioned shortcoming of BOD in applying in high pressure TCR high-pressure thyristor valve; must find a kind of means simple and reliable, with low cost to replace BOD; implement condition monitoring and overvoltage protection to high pressure TCR thyristor valve group, this is problem to be solved by this invention just.
Find a kind of means simple and reliable, with low cost to replace BOD; to state implementing monitoring and the overvoltage protection of high pressure TCR thyristor valve group, must solve following problem: a) find a kind of simple and reliable, high pressure TCR thyristor valve group overvoltage extracting method that threshold values is easy to adjust.B) take into account the extraction to high pressure TCR high-pressure thyristor valve group normal operating conditions information.C) when occurring triggering reliably thyristor pair while exchanging overvoltage fault.
Chinese patent application 201010281722.0 discloses a kind of Novel thyristor overvoltage protection method, is applicable to direct current transportation field.The present invention adopts diverse means, is applied to the overvoltage protection of ac high voltage TCR thyristor valve group, and can complete the real-time detection to thyristor valve group normal operating conditions simultaneously.
Summary of the invention
The object of the invention is to be the problems referred to above for prior art existence; a kind of condition monitoring and overvoltage protective system of high pressure TCR thyristor valve group are provided; this system is simple and reliable; threshold values is easy to adjust; take into account the extraction to high pressure TCR high-pressure thyristor valve group normal operating conditions information, when occurring triggering reliably thyristor pair while exchanging overvoltage fault.
To achieve these goals, the present invention is by the following technical solutions:
Condition monitoring and the overvoltage protective system of high pressure TCR thyristor valve group, comprise master control set, and master control set output master control triggering signal sig2-Driver3, also comprises:
Static state voltage equipoise and information acquisition module, for extracting AC information and the two-way overvoltage signal of TCR thyristor valve group;
Thuristor working state monitoring modular, for monitoring and export OK signal to master control set to the AC information of TCR thyristor valve group;
AC voltage sampling module, for monitoring the two-way overvoltage information of TCR thyristor valve group and monitoring result being input to overvoltage judgement and signal expansion module;
Overvoltage judgement and signal are expanded module, carry out overvoltage judgement and generate overvoltage alarm signal sig1-HV1 according to AC information, and overvoltage alarm signal sig1-HV1 is sent to warning synthesis module after negate generates sig1-HV2 signal;
Forced-triggered pulse train generation module, delivers to a high position according to overvoltage alarm signal sig1-HV1 generation forced-triggered burst signal sig2-Driver2 and gets energy and 1+1 redundant power and thyristor trigger module;
A high position is got energy and 1+1 redundant power and thyristor trigger module, in parallel with TCR thyristor valve group, controls the conducting of TCR thyristor valve group by forced-triggered burst signal sig2-Driver2 or master control triggering signal sig2-Driver3;
Warning synthesis module, receives alarm signal and alarm signal is sent to master control set by an optical fiber sending module, and wherein alarm signal comprises OK signal and sig1-HV2 signal.
Static state voltage equipoise as above and information acquisition module comprise divider resistance row, voltage stabilizing didoe DZ1 and the voltage stabilizing didoe DZ2 of series connection successively, the voltage stabilizing end of voltage stabilizing didoe DZ1 and the voltage stabilizing end of DZ2 are connected with thuristor working state monitoring modular respectively, the anodic bonding of the anode of voltage stabilizing didoe DZ2 and voltage stabilizing didoe DZ1.
Thuristor working state monitoring modular as above comprises voltage sampling signal module, first signal shaping and the processing module, optocoupler transport module and secondary signal shaping and the processing module that connect successively, secondary signal shaping and processing module output OK signal.
AC voltage sampling module as above comprises voltage stabilizing didoe DZ3, voltage stabilizing didoe DZ4, resistance R 4, optocoupler U1 and optocoupler U2, voltage in TCR thyristor valve group outputs to the voltage input interface being made up of the voltage stabilizing end of voltage stabilizing didoe DZ3 and the voltage stabilizing end of voltage stabilizing didoe DZ4 after divider resistance row dividing potential drop, one end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 is connected with resistance R 4 one end, the other end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 and the anodic bonding of voltage stabilizing didoe DZ3, the anodic bonding of the other end of resistance R 4 and voltage stabilizing didoe DZ4.
Overvoltage judgement as above and signal are expanded module and are comprised the signal negate module, signal broadening module and signal shaping and the logic processing module that connect successively, the signal of signal shaping and logic processing module output is divided into two-way, one tunnel is input to forced-triggered pulse train generation module as over voltage alarm signal sig1-HV1, and another road generates sig1-HV2 signal and outputs to warning synthesis module after signal negate module is carried out level negate.
A high position as above is got energy and 1+1 redundant power and thyristor trigger module and is comprised power module and thyristor trigger module, power module comprises 40V main power source, 5V controls power supply, time delay module and thyristor driver power supply, the voltage of getting energy from a TCR thyristor valve group high position is input to 40V main power source by dynamic voltage-balancing, the output of 40V main power source is divided into three tunnels, one tunnel is connected with thyristor trigger module with thyristor driver power supply by time delay module successively, two-way is input to respectively 5V and controls electric power generating composition 1+1 redundant power in addition, forced-triggered burst signal sig2-Driver2 is input to thyristor trigger module, master control set output master control drives signal, master control drives signal to be input to thyristor trigger module as master control triggering signal sig2-Driver3 after an optic fiber transceiver module.
The present invention compared with prior art, has the following advantages and effect:
1, utilize means simple and reliable, with low cost to replace BOD, high pressure TCR thyristor valve group is implemented to overvoltage protection, and obtaining information is implemented to detect in real time to the normal operating conditions of high pressure TCR thyristor valve group simultaneously.
2, can convenient, adjustment accurately flexibly to the threshold voltage of high pressure TCR thyristor valve group enforcement overvoltage protection.
3, the circuit and the structural design that facilitate the TE plate of high pressure TCR, improved its functional reliability.
4, BOD is expensive, and in high pressure TCR, consumption is very large, and the present invention greatly reduces the cost of high pressure TCR equipment.
Brief description of the drawings
Fig. 1 is circuit theory schematic diagram of the present invention;
Fig. 2 is the principle schematic of AC voltage sampling module of the present invention;
Fig. 3 is the principle schematic that overvoltage judgement of the present invention and signal are expanded module;
Fig. 4 be forced-triggered pulse train generation module of the present invention principle schematic (wherein, (a) be circuit diagram, (b) being the waveform schematic diagram of signal sig1-HV1, is (c) the waveform schematic diagram of signal sig2-Driver1);
Fig. 5 is the principle schematic of thuristor working state monitoring modular of the present invention;
Fig. 6 is the principle schematic that a high position of the present invention is got energy and 1+1 redundant power and thyristor trigger module;
Fig. 7 is the principle schematic of warning synthesis module of the present invention.
In figure: 1-static state voltage equipoise and information acquisition module; 2-thuristor working state monitoring modular; 3-AC voltage sampling module; 4-overvoltage judgement and signal are expanded module; 5-forced-triggered pulse train generation module; A 6-high position is got energy and 1+1 redundant power and thyristor trigger module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Embodiment:
As Fig. 1, shown in Fig. 4, a kind of condition monitoring and overvoltage protective system of high pressure TCR thyristor valve group, comprise master control set, and master control set output master control triggering signal sig2-Driver3, also comprises:
Static state voltage equipoise and information acquisition module 1, for extracting AC information and the two-way overvoltage signal of TCR thyristor valve group;
Thuristor working state monitoring modular 2, for monitoring and export OK signal to master control set to the AC information of TCR thyristor valve group;
AC voltage sampling module 3, for monitoring the two-way overvoltage information of TCR thyristor valve group and monitoring result being input to overvoltage judgement and signal expansion module 4;
Overvoltage judgement and signal are expanded module 4, carry out overvoltage judgement and generate overvoltage alarm signal sig1-HV1 according to AC information, and overvoltage alarm signal sig1-HV1 is sent to warning synthesis module after negate generates sig1-HV2 signal;
Forced-triggered pulse train generation module 5, delivers to a high position according to overvoltage alarm signal sig1-HV1 generation forced-triggered burst signal sig2-Driver2 and gets energy and 1+1 redundant power and thyristor trigger module 6;
A high position is got energy and 1+1 redundant power and thyristor trigger module 6, in parallel with TCR thyristor valve group, controls the conducting of TCR thyristor valve group by forced-triggered burst signal sig2-Driver2 or master control triggering signal sig2-Driver3;
Warning synthesis module, receives alarm signal and alarm signal is sent to master control set by an optical fiber sending module, and wherein alarm signal comprises OK signal and sig1-HV2 signal.
Static state voltage equipoise and information acquisition module 1 comprise divider resistance row, voltage stabilizing didoe DZ1 and the voltage stabilizing didoe DZ2 of series connection successively, the voltage stabilizing end of voltage stabilizing didoe DZ1 and the voltage stabilizing end of DZ2 are connected with thuristor working state monitoring modular 2 respectively, the anodic bonding of the anode of voltage stabilizing didoe DZ2 and voltage stabilizing didoe DZ1.
As shown in Figure 5, thuristor working state monitoring modular 2 comprises voltage sampling signal module, first signal shaping and the processing module, optocoupler transport module and secondary signal shaping and the processing module that connect successively, secondary signal shaping and processing module output OK signal.
As shown in Figure 2, AC voltage sampling module 3 comprises voltage stabilizing didoe DZ3, voltage stabilizing didoe DZ4, resistance R 4, optocoupler U1 and optocoupler U2, voltage in TCR thyristor valve group outputs to the voltage input interface being made up of the voltage stabilizing end of voltage stabilizing didoe DZ3 and the voltage stabilizing end of voltage stabilizing didoe DZ4 after divider resistance row dividing potential drop, one end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 is connected with resistance R 4 one end, the other end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 and the anodic bonding of voltage stabilizing didoe DZ3, the anodic bonding of the other end of resistance R 4 and voltage stabilizing didoe DZ4.There is overvoltage fault in thyristor valve group, the photodiode of optocoupler U1, U2 has electric current.
As shown in Figure 3, overvoltage judgement and signal are expanded module 4 and are comprised the signal negate module, signal broadening module and signal shaping and the logic processing module that connect successively, the signal of signal shaping and logic processing module output is divided into two-way, one tunnel is input to forced-triggered pulse train generation module 5 as over voltage alarm signal sig1-HV1, and another road generates sig1-HV2 signal and outputs to warning synthesis module after signal negate module is carried out level negate.
As Fig. 1, shown in Fig. 6, a kind of condition monitoring and overvoltage protective system of high pressure TCR thyristor valve group, also comprise dynamic voltage-balancing, a described high position is got energy and 1+1 redundant power and thyristor trigger module 6 and is comprised power module and thyristor trigger module, power module comprises 40V main power source, 5V controls power supply, time delay module and thyristor driver power supply, the voltage of getting energy from a TCR thyristor valve group high position is input to 40V main power source by dynamic voltage-balancing, the output of 40V main power source is divided into three tunnels, one tunnel is connected with thyristor trigger module with thyristor driver power supply by time delay module successively, two-way is input to respectively 5V and controls electric power generating composition 1+1 redundant power in addition, forced-triggered burst signal sig2-Driver2 is input to thyristor trigger module, master control set output master control drives signal, master control drives signal to be input to thyristor trigger module as master control triggering signal sig2-Driver3 after an optic fiber transceiver module.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (4)
1. condition monitoring and the overvoltage protective system of high pressure TCR thyristor valve group, comprise master control set, it is characterized in that, also comprises:
Static state voltage equipoise and information acquisition module (1), for extracting AC information and the two-way overvoltage signal of TCR thyristor valve group;
Thuristor working state monitoring modular (2), for monitoring and export OK signal to warning synthesis module to the AC information of TCR thyristor valve group;
AC voltage sampling module (3), for monitoring the two-way overvoltage information of TCR thyristor valve group and monitoring result being input to overvoltage judgement and signal expansion module (4);
Overvoltage judgement and signal are expanded module (4), carry out overvoltage judgement and generate overvoltage alarm signal sig1-HV1 according to AC information, and overvoltage alarm signal sig1-HV1 is sent to warning synthesis module after negate generates sig1-HV2 signal;
Forced-triggered pulse train generation module (5), delivers to a high position according to overvoltage alarm signal sig1-HV1 generation forced-triggered burst signal sig2-Driver2 and gets energy and 1+1 redundant power and thyristor trigger module (6);
A high position is got energy and 1+1 redundant power and thyristor trigger module (6), in parallel with TCR thyristor valve group, controls the conducting of TCR thyristor valve group by forced-triggered burst signal sig2-Driver2 or master control triggering signal sig2-Driver3; With
Warning synthesis module, receives alarm signal and alarm signal is sent to master control set by an optical fiber sending module, and wherein alarm signal comprises OK signal and sig1-HV2 signal,
Static state voltage equipoise and information acquisition module (1) comprise successively divider resistance row, voltage stabilizing didoe DZ1 and the voltage stabilizing didoe DZ2 of series connection, the voltage stabilizing end of voltage stabilizing didoe DZ1 and the voltage stabilizing end of DZ2 respectively with thuristor working state monitoring modular
(2) connect, the anodic bonding of the anode of voltage stabilizing didoe DZ2 and voltage stabilizing didoe DZ1,
Also comprise dynamic voltage-balancing, a described high position is got energy and 1+1 redundant power and thyristor trigger module (6) and is comprised power module and thyristor trigger module, power module comprises 40V main power source, 5V controls power supply, time delay module and thyristor driver power supply, the voltage of getting energy from a TCR thyristor valve group high position is input to 40V main power source by dynamic voltage-balancing, the output of 40V main power source is divided into three tunnels, one tunnel is connected with thyristor trigger module with thyristor driver power supply by time delay module successively, two-way is input to respectively 5V and controls electric power generating composition 1+1 redundant power in addition, forced-triggered burst signal sig2-Driver2 is input to thyristor trigger module, master control set output master control drives signal, master control drives signal to be input to thyristor trigger module as master control triggering signal sig2-Driver3 after an optic fiber transceiver module.
2. condition monitoring and the overvoltage protective system of a kind of high pressure TCR thyristor valve group according to claim 1; it is characterized in that; described thuristor working state monitoring modular (2) comprises voltage sampling signal module, first signal shaping and the processing module, optocoupler transport module and secondary signal shaping and the processing module that connect successively, secondary signal shaping and processing module output OK signal.
3. condition monitoring and the overvoltage protective system of a kind of high pressure TCR thyristor valve group according to claim 1, it is characterized in that, described AC voltage sampling module (3) comprises voltage stabilizing didoe DZ3, voltage stabilizing didoe DZ4, resistance R 4, optocoupler U1 and optocoupler U2, voltage in TCR thyristor valve group outputs to the voltage input interface being made up of the voltage stabilizing end of voltage stabilizing didoe DZ3 and the voltage stabilizing end of voltage stabilizing didoe DZ4 after divider resistance row dividing potential drop, one end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 is connected with resistance R 4 one end, the other end after the photodiode parallel connected in reverse phase of the photodiode of optocoupler U1 and optocoupler U2 and the anodic bonding of voltage stabilizing didoe DZ3, the anodic bonding of the other end of resistance R 4 and voltage stabilizing didoe DZ4.
4. condition monitoring and the overvoltage protective system of a kind of high pressure TCR thyristor valve group according to claim 1, it is characterized in that, described overvoltage judgement and signal are expanded module (4) and are comprised the signal negate module connecting successively, signal broadening module and signal shaping and logic processing module, the signal of signal shaping and logic processing module output is divided into two-way, one tunnel is input to forced-triggered pulse train generation module (5) as over voltage alarm signal sig1-HV1, another road generates sig1-HV2 signal and outputs to warning synthesis module after signal negate module is carried out level negate.
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| CN201210190097.8A CN102709886B (en) | 2012-06-08 | 2012-06-08 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
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| CN201210190097.8A CN102709886B (en) | 2012-06-08 | 2012-06-08 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103457590B (en) * | 2013-08-30 | 2016-10-05 | 株洲变流技术国家工程研究中心有限公司 | The detection method of photo thyristor built-in over-voltage protective and the generating means of status signal |
| CN103616573B (en) * | 2013-12-12 | 2016-08-17 | 国家电网公司 | A kind of IGCT QRR measures system and measuring method thereof |
| CN105158669B (en) * | 2015-08-28 | 2017-12-22 | 中冶南方工程技术有限公司 | A kind of IGCT over-voltage detection circuit for TCR type high pressure SVC devices |
| CN110323931A (en) * | 2019-08-15 | 2019-10-11 | 荣信汇科电气技术有限责任公司 | A kind of redundancy trigger circuit comprising state feedback function |
| CN112702052A (en) * | 2020-12-15 | 2021-04-23 | 山东管理学院 | High-voltage thyristor valve group triggering system and method |
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| US5093630A (en) * | 1989-04-14 | 1992-03-03 | Kabushiki Kaisha Toshiba | Overvoltage protection in series thyristor string for static var compensator |
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