CN114069848A - Thyristor-level state monitoring system of light-operated converter valve - Google Patents
Thyristor-level state monitoring system of light-operated converter valve Download PDFInfo
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- CN114069848A CN114069848A CN202111272076.6A CN202111272076A CN114069848A CN 114069848 A CN114069848 A CN 114069848A CN 202111272076 A CN202111272076 A CN 202111272076A CN 114069848 A CN114069848 A CN 114069848A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 71
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000007689 inspection Methods 0.000 claims description 4
- 230000001934 delay Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
A thyristor-level state monitoring system of a light-operated converter valve comprises a TVM plate, a star coupler MSC, an optical cable and a valve control monitoring unit. The TVM board is arranged near each thyristor stage in the converter valve assembly, can monitor the voltage at two ends of the thyristor of the stage and generates a return detection signal. The star coupler MSC is used to reduce the number of valve tower cables used. And a fully redundant valve control monitoring unit is configured for monitoring the power-off replacement of the board card. The thyristor-level state monitoring system of the light-operated converter valve can realize the time-sharing monitoring of the thyristor-level state of the light-operated converter valve and the redundant design of the monitoring system, simultaneously greatly reduces the use number of optical cables and valve-control monitoring units, and improves the safety and reliability of the operation of the converter valve system.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current power transmission, and particularly relates to a thyristor-level state monitoring system of a light-operated converter valve.
Background
The converter valve equipment is used as one of core equipment of high-voltage direct-current transmission, and the reliability and the stability of the operation of a direct-current system are directly influenced by the performance of the converter valve equipment.
The light-operated converter valve device adopts a modular design and consists of a plurality of valve components, wherein each valve component comprises a plurality of thyristor stages, namely each thyristor stage is the minimum basic unit for forming the converter valve. The thyristor level mainly comprises functional components such as a thyristor, a damping resistor, a damping capacitor, a TVM plate and the like. The TVM plate monitors the voltage across the thyristor level, generates a positive return detection signal of 6-8 mus width when the positive voltage across the thyristor level exceeds 150V, and generates a negative return detection signal of 2-4 mus width when the negative voltage across the thyristor level exceeds-80V. The return detection signal generated by each TVM board is transmitted to a valve control light receiving board card through an optical cable, and the light receiving board card converts the light signal into an electric signal to be read and processed, so that the monitoring of the thyristor level state is realized.
At present, domestic high-voltage direct-current transmission is in a high-speed development stage, and more than 30 direct-current transmission projects are built and put into operation. The converter valve in the direct current transmission project has more optical cables and valve control monitoring units, and the cost is high. Moreover, the existing thyristor-level state monitoring system for the light-operated converter valve does not realize real redundancy, and a light receiving board card cannot be replaced in a power-off mode, so that great hidden danger is brought to the running reliability of a high-voltage direct-current power transmission system.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide a thyristor-level state monitoring system for a light-operated converter valve, which can greatly reduce the use number of optical cables and valve-control monitoring units of a converter valve tower, can realize the complete redundancy of the thyristor-level monitoring system for the light-operated converter valve, and ensures that the monitoring units are replaced under the condition of no power failure, thereby reducing the cost and simultaneously improving the safety and reliability of the operation of the light-operated converter valve.
The invention is realized by the following technical scheme:
a thyristor-level state monitoring system of a light-operated converter valve comprises a TVM plate, a star coupler MSC, an optical cable and a valve control monitoring unit.
Further, the TVM plate is arranged near each thyristor stage in the converter valve assembly, and can monitor the voltage at two ends of the thyristor of the stage and generate a return detection signal.
Further, the star coupler MSC is used to reduce the number of valve tower cables used.
Furthermore, a fully redundant valve control monitoring unit is configured for monitoring the power-off replacement of the board card.
Further, the board card is provided with a positive voltage and negative voltage monitoring module for monitoring the state of the thyristor, when the positive voltage at two ends of the thyristor exceeds 150V, the TVM board generates a positive return detection signal with the width of 6-8 mus, and when the negative voltage at two ends of the thyristor exceeds-80V, the TVM board generates a negative return detection signal with the width of 2-4 mus.
Furthermore, the board card is provided with a time delay module and a dial switch, and the dial switch is used for setting the TVM plate to generate return detection signals with different time delays according to the serial number of the thyristor level in the valve section where the TVM plate is located.
Further, star couplers MSC are provided on the valve tower side and the valve monitoring unit side, respectively.
Furthermore, the star coupler MSC comprises a plurality of paths of optical signal inputs and two paths of optical signals outputs, and the two paths of output optical signals are sent to two input ends of the valve control monitoring unit side MSC.
Further, the star coupler MSC includes two optical signal inputs and two optical signal outputs, and the two output optical signals are respectively sent to two different valve-controlled monitoring units.
Furthermore, each optical device on the valve control monitoring unit can receive the return detection signals of all thyristor levels of one valve assembly, and identify the return detection signals of each thyristor level according to the synchronization signals, so as to judge whether the state of each thyristor level is normal or not.
The technical scheme of the invention can realize the following beneficial technical effects:
the thyristor-level state monitoring system of the light-operated converter valve can realize the time-sharing monitoring of the thyristor-level state of the light-operated converter valve and the redundant design of the monitoring system, simultaneously greatly reduces the use number of optical cables and valve-control monitoring units, and improves the safety and reliability of the operation of the converter valve system.
Drawings
FIG. 1 is a schematic diagram of a thyristor-level state monitoring system of an original photo-controlled converter valve;
fig. 2 is a schematic diagram of a thyristor-level state monitoring system of an optically controlled converter valve according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In a specific embodiment, the present invention provides a thyristor level condition monitoring system for an optically controlled converter valve, which is schematically illustrated in fig. 2. The invention relates to a thyristor-level state monitoring system of a light-operated converter valve, which comprises a TVM plate, a star coupler MSC, an optical cable and a valve control monitoring unit.
Specifically, the TVM board is provided with a positive voltage monitoring module and a negative voltage monitoring module, can monitor the state of the thyristor level, namely can monitor the voltage at two ends of the thyristor level, and generates a positive return inspection signal with the width of 6-8 mu s when the positive voltage at two ends of the thyristor level exceeds 150V, and generates a negative return inspection signal with the width of 2-4 mu s when the negative voltage at two ends of the thyristor level exceeds-80V. The TVM board is provided with a time delay module and a 4-bit dial switch, and the 4-bit dial switch is used for setting the TVM board to generate return detection signals with different time delays according to the serial number of the thyristor level where the TVM board is located. For example: the TVM board delay of the thyristor level V1 is set to 0 × t, the TVM board delay of the V2 is set to 1 × t, the TVM board delay of the V3 is set to 2 × t, and so on, and the TVM board delay of the V15 is set to 15 × t. Where t is a delay element, the optimum value is determined experimentally.
Specifically, in the light-operated converter valve thyristor stage state monitoring system, the input end of the star coupler MSC at the valve tower side is from the return detection signals of the TVM boards of all thyristor stages in a single component, and the two output ends are connected to the MSC at the valve control side.
The input ends of the valve control side MSC are from two outputs of a single valve section MSC at the valve tower side, and the two output ends of the valve control side MSC are respectively connected with two independent control monitoring units.
The valve control monitoring unit converts optical signals into electric signals to be read according to signals and synchronous signals transmitted by the MSC at the valve control side, and the monitoring of the states of all thyristors in a single component is realized. The number of the valve control monitoring units is greatly reduced, and taking a single valve comprising 4 valve sections (each valve section comprises 15 thyristor stages) as an example, the number of the valve control monitoring units is reduced from original 4 to 2/3, and meanwhile, the complete redundancy configuration of the return detection signals can be realized.
The number of the return inspection optical cables from the valve tower to the valve control is reduced from 60 to 8.
Each valve train section requires the use of 2 star couplers MSC: one is the MSC with the inlet 2 and outlet 2 of the valve tower side 16, the input end of the MSC is the return detection signal of the TVM plate of all the thyristor stages in a single valve group section, and the output end of the MSC is connected to the MSC with the valve control side; the other is a valve control side 2-in 2-out MSC, the input end of the MSC is from 2 outputs of the MSC at the single valve group section side, and the output end of the MSC is respectively connected with 2 independent control and monitoring units.
Specifically, in the thyristor-level state monitoring system of the light-operated converter valve, the valve-control monitoring unit converts the optical signals into electrical signals for reading and processing according to the signals transmitted by the valve-control side MSC and the synchronous signals acquired by the valve-control side MSC, so that the monitoring of the state of all the thyristors in the valve block section is realized.
In summary, the present invention provides a thyristor-level state monitoring system for a light-operated converter valve, which includes a TVM board, a star coupler MSC, an optical cable, and a valve-control monitoring unit. The TVM board is arranged near each thyristor stage in the converter valve assembly, can monitor the voltage at two ends of the thyristor of the stage and generates a return detection signal. The star coupler MSC is used to reduce the number of valve tower cables used. And a fully redundant valve control monitoring unit is configured for monitoring the power-off replacement of the board card. The thyristor-level state monitoring system of the light-operated converter valve can realize the time-sharing monitoring of the thyristor-level state of the light-operated converter valve and the redundant design of the monitoring system, simultaneously greatly reduces the use number of optical cables and valve-control monitoring units, and improves the safety and reliability of the operation of the converter valve system. It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A thyristor-level state monitoring system of a light-operated converter valve is characterized by comprising a TVM plate, a star coupler MSC, an optical cable and a valve control monitoring unit.
2. The system of claim 1, wherein the TVM board is mounted in the converter valve assembly in proximity to each thyristor stage to monitor the voltage across the thyristor of that stage and generate a back-check signal.
3. The light operated converter valve thyristor level condition monitoring system of claim 2, wherein the star coupler MSC is configured to reduce the number of valve tower cables used.
4. The thyristor-level state monitoring system for light-operated converter valves of claim 3, wherein a fully redundant valve-controlled monitoring unit is provided for monitoring the replacement of a board card in case of power failure.
5. The TVM board of claim 4, wherein the board card is configured with positive and negative voltage monitoring modules for monitoring the state of the thyristor, the TVM board generating a 6-8 μ s wide positive return signal when the positive voltage across the thyristor exceeds 150V and generating a 2-4 μ s wide negative return signal when the negative voltage across the thyristor exceeds-80V.
6. The TVM board of claim 5, wherein the board card is provided with a delay module and a dial switch, and the dial switch is used for setting the TVM board to generate the return inspection signals with different delays according to the serial number of the thyristor stage in the valve section where the TVM board is located.
7. The star coupler MSC of claim 6, wherein the star coupler MSC is provided on the valve tower side and the valve monitoring unit side, respectively.
8. The valve tower side star coupler MSC of claim 7, wherein the star coupler MSC comprises a plurality of optical signal inputs and two optical signal outputs, and the two optical signals are provided to two inputs of the valve-controlled monitoring unit side MSC.
9. The star coupler MSC on the valve-regulated monitoring unit side according to claim 7, wherein the star coupler MSC comprises two optical signal inputs and two optical signal outputs, and the two optical signals are respectively sent to two different valve-regulated monitoring units.
10. The valve-controlled monitoring unit of claim 4, wherein each optical device of the valve-controlled monitoring unit is capable of receiving the back-check signals of all the thyristor stages of one valve assembly, and recognizing the back-check signals of each thyristor stage according to the synchronization signal, thereby determining whether the state of each thyristor stage is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111272076.6A CN114069848A (en) | 2021-10-29 | 2021-10-29 | Thyristor-level state monitoring system of light-operated converter valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111272076.6A CN114069848A (en) | 2021-10-29 | 2021-10-29 | Thyristor-level state monitoring system of light-operated converter valve |
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| CN114069848A true CN114069848A (en) | 2022-02-18 |
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| CN202111272076.6A Pending CN114069848A (en) | 2021-10-29 | 2021-10-29 | Thyristor-level state monitoring system of light-operated converter valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115022378A (en) * | 2022-08-03 | 2022-09-06 | 中国南方电网有限责任公司超高压输电公司广州局 | Transmission valve control equipment communication method and system, valve tower monitoring equipment and storage medium |
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2021
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