CN102055307A - Trigger and online monitoring system for thyristor valve group - Google Patents
Trigger and online monitoring system for thyristor valve group Download PDFInfo
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- CN102055307A CN102055307A CN2010105031099A CN201010503109A CN102055307A CN 102055307 A CN102055307 A CN 102055307A CN 2010105031099 A CN2010105031099 A CN 2010105031099A CN 201010503109 A CN201010503109 A CN 201010503109A CN 102055307 A CN102055307 A CN 102055307A
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Abstract
The invention relates to a trigger and online monitoring system for a thyristor valve group, which is provided with a plurality of thyristor assemblies connected in series. The trigger and online monitoring system for a thyristor valve group is characterized by comprising a logic control circuit, a receiving and transmitting loop, a gate electrode trigger circuit and a thyristor state monitoring circuit, wherein the receiving and transmitting loop, the gate electrode trigger circuit and the thyristor state monitoring circuit are respectively connected with the logic control circuit; the logic control circuit generates a trigger impulse by the gate electrode trigger circuit to trigger a thyristor; the receiving and transmitting loop is used for transmitting a thyristor valve group trigger signal and a thyristor state signal; and the thyristor state monitoring circuit is used for monitoring the state of the thyristor and providing the thyristor state signal to the logic control circuit. The system can provide high-consistency pulse trigger for the thyristor valve group and monitor the state of each thyristor in the thyristor valve group.
Description
Technical field
The present invention relates to be used for the triggering and the on-line monitoring system of thyristor valve group.
Background technology
Thyristor is a kind of current trigger type device, and the conducting of thyristor need provide the current impulse of a certain size and width at gate pole.The high-pressure thyristor valve group of being made up of high-power thyristor is the core component of high pressure high-power applications occasions such as high voltage direct current transmission, static reactive power compensation, high pressure soft starting, how to realize reliably that triggering and on-line monitoring to the high-pressure thyristor valve group are the keys that makes the said equipment reliability service.And in the prior art, can't guarantee that also the consistency of whole thyristor valve group triggers, also can't guarantee the reliably open-minded of thyristor valve group.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art with not enough, be provided for the triggering and the on-line monitoring system of thyristor valve group, this system can trigger for the thyristor valve group provides the consistency hard pulse, can monitor the state of every thyristor on the thyristor valve group.
Purpose of the present invention is achieved through the following technical solutions: the triggering and the on-line monitoring system that are used for the thyristor valve group, be provided with the thyristor assembly that several are in series, comprise logic control circuit, and the reception that is connected with logic control circuit respectively and transmission loop, gate trigger circuit and thyristor status monitoring circuit; Described logic control circuit produces the trigger pulse triggers thyristor by gate trigger circuit; Described reception and transmission loop are used to transmit thyristor valve group triggering signal, thyristor status signal; Described thyristor status monitoring circuit is used to monitor the state of thyristor, and provides the thyristor status signal to logic control circuit.
Described gate trigger circuit comprises High-voltage Isolated Pulse Transformer, device for power switching, and the drive circuit that is connected on the High-voltage Isolated Pulse Transformer primary side; The secondary side of described High-voltage Isolated Pulse Transformer is connected with gate circuit transistor gate through behind the device for power switching; Drive circuit receives the drive signal of being sent by logic control circuit, and drive signal is carried out processing and amplifying, then successively through behind High-voltage Isolated Pulse Transformer, the device for power switching gate circuit transistor gate being driven.
In the described thyristor assembly that several are in series, each thyristor assembly includes a pair of antiparallel high-voltage power thyristor, dynamic resistance-capacitance absorbs circuit, static state voltage equipoise circuit and thyristor and triggers and the on-line monitoring module, the static state voltage equipoise circuit is connected between the sys node of thyristor triggering and on-line monitoring module and described a pair of antiparallel high-voltage power thyristor, and dynamic resistance-capacitance absorbs the two ends that circuit is connected in parallel on described a pair of anti-parallel thyristor.
Described static state voltage equipoise circuit is the noninductive power resistor R1 of high pressure.
Described dynamic resistance-capacitance absorbs circuit and is made of noninductive power resistor R3 of the high pressure that is in series and the noninductive capacitor C 1 of high pressure.
Described logic control circuit comprises first trigger that is used to receive and latch gate pole triggering control signal that connects successively, thyristor state-detection and heavily trigger logical circuit, thus and be used for when the clock trailing edge broad-adjustable start pulse signal of triggering for generating and after start pulse signal sends, produce second trigger that the gate pole triggering signal reliably triggers thyristor.
Above-mentioned triggering and the on-line monitoring system that is used for the thyristor valve group also comprises the urgent circuits for triggering that are connected with logic control circuit; Described urgent circuits for triggering are connected in parallel on the thyristor two ends.
The present invention has following advantage and effect with respect to prior art:
1, the control signal of native system sends to the circuits for triggering plate of thyristor valve base by optical fiber, the logic control circuit part to control signal, thyristor status signal, get and can carry out integrated treatment by the circuit state signal, provide triggering signal at last, with the conducting of valve group.Native system can trigger for the thyristor valve group provides the consistency hard pulse, can monitor the state of every thyristor on the thyristor valve group; After triggering signal was sent, because the consistency difference of parameter causes postponing to trigger, then gate trigger circuit can be reissued a trigger impulse immediately if any thyristor, guaranteed that the consistency of whole thyristor valve group triggers, thereby guaranteed the reliably open-minded of thyristor valve group.
2, the present invention is applied to the high-pressure thyristor valve group; the valve stack features is: per two positive and negative connecting together of high-pressure high-power thyristor; and be provided with static voltage sharing and dynamic resistance-capacitance absorption circuit, impact the infringement that thyristor is caused with the voltage and current of protection when the valve group is opened shutoff.
3, adopt high pressure isolation high-power pulse transformer as with the triggering of the antiparallel thyristor of forward thyristor, this high pressure isolation high-power pulse transformer can provide to be put the electric current rising front extremely suddenly and triggers power, the consistency that can reliably finish reverse thyristor valve group reliably triggers, thereby realizes the triggering of a pair of positive and negative and thyristor valve group.And positive and negative and the urgent diac of shared one road BOD of two thyristors as standby triggering, when triggering signal breaks down, or during the circuits for triggering fault, the BOD circuit will provide urgent triggering.
4, the forward circuits for triggering adopt pulse transformer that triggering signal and forward gate circuit transistor gate are isolated, and can effectively prevent the interference of thyristor valve group main circuit to gate trigger circuit, guarantee the safe and reliable operation of thyristor valve group.
Description of drawings
Fig. 1 is that the thyristor high potential triggers and the status monitoring circuit theory diagrams;
Fig. 2 is the schematic diagram of high-pressure thyristor valve group;
Fig. 3 is the gate trigger circuit figure of thyristor;
Fig. 4 is the logic control circuit figure of thyristor;
Fig. 5 is urgent circuits for triggering figure.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, thyristor of the present invention triggers and condition monitoring system, comprise logic control circuit, power module, and the optical fiber that is connected with logic control circuit respectively receives and sends loop, gate trigger circuit, urgent circuits for triggering and thyristor status monitoring circuit.Wherein, power module comprises gets energy loop, power supply monitoring loop and power source conversion loop, power module provides working power for whole system and power supply status is monitored, and receives and sends it back the road direction master controller by optical fiber when power supply breaks down and send fault-signal.Optical fiber receives and sends the loop and receives the thyristor valve group triggering signal that master controller sends over, and returns thyristor status signal, urgent circuits for triggering status signal etc. toward master controller.Logic control circuit sends the gate pole triggering signal according to each status signal and triggering signal, produces big current trigger pulse-triggered thyristor by gate trigger circuit.Thyristor status monitoring circuit is used to monitor the state of thyristor, and provides status signal to logic control circuit, carries out logical process.When the triggered as normal circuit broke down, urgent circuits for triggering reliably triggered action message with the pairing thyristor of faulty circuit, and by optical fiber reception and transmission loop urgent triggering signal were repaid to master controller.Described master controller is used for the triggering of thyristor valve group with the present invention and the optical receiving circuit of condition monitoring system is connected.
Thyristor valve group of the present invention is provided with the thyristor assembly that several are in series as shown in Figure 2, and the quantity of thyristor assembly is set according to the difference of applied voltage grade.Each high-pressure thyristor assembly comprises that a pair of antiparallel high-voltage power thyristor, dynamic resistance-capacitance absorb circuit, static state voltage equipoise circuit and thyristor and trigger and the on-line monitoring module, the static state voltage equipoise circuit is connected between the sys node of thyristor triggering and on-line monitoring module and described a pair of antiparallel high-voltage power thyristor, the partial circuit that described dynamic resistance-capacitance absorbs on circuit and thyristor triggering and the on-line monitoring module is got the energy loop common the composition, and dynamic resistance-capacitance absorbs the two ends that circuit is connected in parallel on a pair of anti-parallel thyristor.With first group of thyristor valve group is example, every group of thyristor valve group comprises a pair of antiparallel high-voltage power thyristor Q1, Q3, be connected the noninductive power resistor R1 of high pressure between thyristor triggering and on-line monitoring module and high-voltage power thyristor Q1, the Q3 sys node, the dynamic resistance-capacitance that is made of noninductive power resistor R3 of the high pressure that is in series and the noninductive capacitor C 1 of high pressure absorbs circuit; Described high pressure is noninductive, and power resistor R1 is a static voltage sharing, constitutes above-mentioned static state voltage equipoise circuit.
Because the thyristor performance parameters is inconsistent, when thyristor turn-offed, the inconsistent voltage that will cause the thyristor on the same valve group to bear of leakage current was inconsistent, influences valve group overall performance; Therefore need to adopt the noninductive power resistor of high pressure to realize the static state voltage equipoise of each device of valve group; Present embodiment adopts the noninductive power resistor R1 of above-mentioned high pressure to constitute static evenly circuit.When the valve group turns on and off, open the latest and the device that turn-offs the earliest in order to protect, need to adopt the dynamic resistance-capacitance absorption circuit of forming by high pressure noninductive power electricity group and the noninductive electric capacity of high pressure to protect; Present embodiment employing noninductive power resistor R3 of high pressure and the noninductive capacitor C 1 of high pressure are in series and constitute dynamic resistance-capacitance absorption circuit.
As shown in Figure 3, gate trigger circuit comprises High-voltage Isolated Pulse Transformer, device for power switching Q2, and the drive circuit that is connected on the High-voltage Isolated Pulse Transformer primary side, be connected with gate circuit transistor gate behind the secondary side process device for power switching Q2 of described High-voltage Isolated Pulse Transformer; Drive circuit receives the drive signal of being sent by logic control circuit, and drive signal is carried out processing and amplifying, then successively through behind High-voltage Isolated Pulse Transformer, the device for power switching Q2 gate circuit transistor gate being driven.The common realization of High-voltage Isolated Pulse Transformer and device for power switching Q2 drives triggering to a pair of just antiparallel thyristor.In this circuit, when thyristor Q1 forward voltage bias, the biasing of thyristor Q3 reverse voltage, MOSFET chip for driving IC1 receives the gate pole triggering signal that master controller sends out, produce a gate trigger current that is up to 2A and come fast driving MOSFET device Q4, further isolate and power amplification by drive circuit, produce a more powerful drive signal and come driving switch device Q2; After the Q2 conducting, trigger power supply and produce a very precipitous gate current at gate pole G12, the K12 of high-power thyristor Q1, make the Q1 triggering and conducting by R1, C2 circuit and diode D7, voltage stabilizing didoe D8.This moment also can the generator gate electrode current at the secondary side of pulse transformer PT, but because Q3 this moment is a reverse bias, the electric current that the PT secondary side forms can not make the Q3 triggering and conducting.When Q1 reverse bias and Q3 forward bias, the trigger current High-voltage Isolated Pulse Transformer PT that flows through, at the secondary side of PT, promptly gate pole G11, the K11 of high-power thyristor Q3 produce precipitous gate current, trigger the Q3 conducting.Also can produce a gate current at gate pole G12, the K12 of Q1 this moment, but because this moment, Q1 bore is reverse voltage, so can't cause misleading of Q1.
As mentioned above, the gate trigger circuit that the present invention is designed adopts High-voltage Isolated Pulse Transformer, can realize the triggering of a pair of just antiparallel thyristor on a circuit board.Gate trigger circuit adopts the MOSFET special driving chip, drive signal is added on gate circuit transistor gate after isolating amplification, the integrated circuit antijamming capability is strong, circuit delay is short and stable, the slave controller triggering signal is issued to the generation gate trigger current, whole circuit delay is less than 200ns, and the gate current rise time can guarantee that less than 0.5us extraordinary consistency triggers effect.
As shown in Figure 4, logic control circuit comprises successively the first trigger U2A, the thyristor state-detection that connects and heavily triggers logical circuit, the second trigger U3A, and thyristor state-detection and the input signal that heavily triggers logical circuit are control power state signal, forward thyristor status signal and anti-parallel thyristor status signal.The first trigger U2A receives and latchs gate pole and triggers control signal, improves the antijamming capability of control circuit, guarantees to trigger logical circuit and does not send the false triggering signal.The second trigger U3A is broad-adjustable start pulse signal of triggering for generating when the clock trailing edge; After start pulse signal sent, when the control power supply is normal, and thyristor reached after certain forward bias, could produce the gate pole triggering signal, with the reliable triggering of assurance thyristor.Another characteristics of this circuit are after triggering signal finishes, as the thyristor that is triggered is not kept conducting and shutoff again, then will produce a forward bias signal again, control circuit will send a start pulse signal again to trigger this thyristor again, and this will improve the reliable performance of thyristor valve group greatly.
Fig. 5 is the urgent circuits for triggering that are connected in parallel on the thyristor two ends, and the present invention can realize the urgent trigger protection function of positive anti-parallel thyristor.Urgent circuits for triggering comprise the high-voltage diode bridge, the urgent diac of BOD that connects with the high-voltage diode bridging and the urgent detection trigger circuit of BOD that connects with the high-voltage diode bridging, and the urgent diac of high-voltage diode bridge and BOD aligns antiparallel thyristor and carries out bidirectional protective.When gate trigger circuit breaks down, even whole thyristor triggers when breaking down with the on-line monitoring circuit, and urgent circuits for triggering still can be realized the triggering of thyristor in time, reliably, and urgent triggering signal is sent to master controller.When the thyristor forward bias, and circuits for triggering break down and when failing to send triggering signal, too high voltage will be added in above the urgent diac through D5, D3, D7, when voltage reaches trigger voltage, the breakdown conducting of diode, current limliting through current-limiting resistance R2 produces gate pole G1, K1 that a current waveform is added in thyristor, with the thyristor triggering and conducting.When reverse thyristor forward bias and circuits for triggering fault, electric current produces a gate current waveform through D10, R2, D4, D6 at gate pole G2, the K2 of anti-parallel thyristor, with reverse parallel connection thyristor triggering and conducting.Any one in the anti-parallel thyristor all will obtain an actuating signal by urgent detection trigger circuit when producing action triggers, and this signal sends to master controller after the optical fiber transtation mission circuit is handled, and the particular location of urgent triggering takes place report thyristor valve group.So the urgent circuits for triggering that the present invention is designed can guarantee the reliable triggering to thyristor, can also in time accurately repay the particular location of motion device to control system, realize the good control performance of whole valve group.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. the triggering and the on-line monitoring system that are used for the thyristor valve group, be provided with the thyristor assembly that several are in series, it is characterized in that, comprise logic control circuit, and the reception that is connected with logic control circuit respectively and transmission loop, gate trigger circuit and thyristor status monitoring circuit; Described logic control circuit produces the trigger pulse triggers thyristor by gate trigger circuit; Described reception and transmission loop are used to transmit thyristor valve group triggering signal, thyristor status signal; Described thyristor status monitoring circuit is used to monitor the state of thyristor, and provides the thyristor status signal to logic control circuit.
2. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 1, it is characterized in that, described gate trigger circuit comprises High-voltage Isolated Pulse Transformer, device for power switching, and the drive circuit that is connected on the High-voltage Isolated Pulse Transformer primary side; The secondary side of described High-voltage Isolated Pulse Transformer is connected with gate circuit transistor gate through behind the device for power switching; Drive circuit receives the drive signal of being sent by logic control circuit, and drive signal is carried out processing and amplifying, then successively through behind High-voltage Isolated Pulse Transformer, the device for power switching gate circuit transistor gate being driven.
3. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 1, it is characterized in that, in the described thyristor assembly that several are in series, each thyristor assembly includes a pair of antiparallel high-voltage power thyristor, dynamic resistance-capacitance absorbs circuit, static state voltage equipoise circuit and thyristor and triggers and the on-line monitoring module, the static state voltage equipoise circuit is connected between the sys node of thyristor triggering and on-line monitoring module and described a pair of antiparallel high-voltage power thyristor, and dynamic resistance-capacitance absorbs the two ends that circuit is connected in parallel on described a pair of anti-parallel thyristor.
4. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 3 is characterized in that, described static state voltage equipoise circuit is the noninductive power resistor R1 of high pressure.
5. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 3 is characterized in that, described dynamic resistance-capacitance absorbs circuit and is made of noninductive power resistor R3 of the high pressure that is in series and the noninductive capacitor C 1 of high pressure.
6. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 1, it is characterized in that, described logic control circuit comprises first trigger that is used to receive and latch gate pole triggering control signal that connects successively, thyristor state-detection and heavily trigger logical circuit, thus and be used for when the clock trailing edge broad-adjustable start pulse signal of triggering for generating and after start pulse signal sends, produce second trigger that the gate pole triggering signal reliably triggers thyristor.
7. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 1 is characterized in that, also comprises the urgent circuits for triggering that are connected with logic control circuit; Described urgent circuits for triggering are connected in parallel on the thyristor two ends.
8. triggering and the on-line monitoring system that is used for the thyristor valve group according to claim 1 is characterized in that, described reception and transmission loop are that optical fiber receives and send the loop.
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Effective date of registration: 20210108 Address after: 200335 Room 401, No.9A, Lane 658, Jinzhong Road, Changning District, Shanghai Patentee after: SHANGHAI ZHIGUANG ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: 510760, No. 51, Po Nan Road, Po Po Industrial Zone, Whampoa District, Guangdong, Guangzhou Patentee before: GUANGZHOU ZHIGUANG ELECTRIC Co.,Ltd. |