CN115622374A - Converter valve triggering system and control system for direct current transmission system - Google Patents
Converter valve triggering system and control system for direct current transmission system Download PDFInfo
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- CN115622374A CN115622374A CN202211170344.8A CN202211170344A CN115622374A CN 115622374 A CN115622374 A CN 115622374A CN 202211170344 A CN202211170344 A CN 202211170344A CN 115622374 A CN115622374 A CN 115622374A
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- 230000003287 optical effect Effects 0.000 claims abstract description 159
- 230000008878 coupling Effects 0.000 claims abstract description 30
- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 230000001960 triggered effect Effects 0.000 claims description 13
- 239000013307 optical fiber Substances 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The application relates to the technical field of converter valve control in direct-current power transmission, and provides a converter valve triggering system and a control system for a direct-current power transmission system. In the application, every two light emitting plates are used for emitting trigger pulses under the control of the same converter valve control system, each first-stage optical splitter is used for receiving the trigger pulses emitted by one light emitting plate and distributing the trigger pulses to all second-stage optical splitters, each second-stage optical splitter is used for receiving and coupling the trigger pulses emitted by all first-stage optical splitters, the trigger pulses obtained through coupling are distributed to all third-stage optical splitters, and each third-stage optical splitter is used for receiving and coupling the trigger pulses emitted by all second-stage optical splitters and distributing the trigger pulses to a thyristor in the converter valve to trigger the thyristor, so that the effect that any optical splitter in a loop fails and the normal triggering effect of the converter valve cannot be influenced is achieved.
Description
Technical Field
The application relates to the technical field of converter valve control in direct current transmission, in particular to a trigger system of a converter valve and a control system for a direct current transmission system.
Background
In a traditional direct current transmission system, a converter valve consists of a plurality of thyristors, each converter valve control system controls two light emitting plates to send trigger pulses to the same optical splitter, and the optical splitter evenly distributes and outputs the received trigger pulses to the plurality of thyristors after coupling the trigger pulses to trigger the converter valve.
If the optical splitter fails, all thyristors receiving trigger pulses of the optical splitter cannot be triggered, so that a direct-current transmission system is directly tripped, and the system stability is poor.
Disclosure of Invention
In view of the above, it is necessary to provide a converter valve triggering system and a control system for a dc power transmission system.
The application provides a trigger system of converter valve, trigger system includes: the optical fiber module comprises a light emitting plate and three levels of optical splitters;
each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system;
each optical splitter of the first stage is used for receiving a trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage;
each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage;
each optical splitter of the third stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the second stage and sending the trigger pulses to a thyristor in the converter valve so as to trigger the thyristor;
and if the preset number of thyristors are not normally triggered, tripping the direct current transmission system.
In one embodiment, the trigger conditions for the light emitting panel to be controlled by the converter valve control system are: and the high-voltage direct-current control system issues a trigger instruction to the converter valve control system.
In one embodiment, the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
In one embodiment, the distribution for the above-mentioned trigger pulses is an average distribution.
In one embodiment, the number ratio of the converter valve control system, the light emitting plate, the first stage of optical splitter, the second stage of optical splitter and the third stage of optical splitter is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
Simultaneously, this application still provides a control system to direct current transmission system, control system includes:
a trigger system, a converter valve control system, a converter valve as in any of the embodiments above; the converter valve comprises a plurality of groups of thyristors, wherein each thyristor in each group of thyristors is connected in series, and the running states of each thyristor in the plurality of groups of thyristors are consistent;
the single converter valve control system is used for controlling the two light emitting plates of the trigger system to send out trigger pulses;
and if the thyristors in the converter valve are not normally triggered by the preset number, tripping the direct current transmission system.
In one embodiment, the trigger conditions for the light emitting panel to be controlled by the converter valve control system are: and the high-voltage direct-current control system sends a trigger instruction to the converter valve control system.
In one embodiment, the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
In one embodiment, the distribution for the above-mentioned trigger pulses is an average distribution.
In one embodiment, the ratio of the number of converter valve control systems, the light emitting panels, the optical splitters of the first stage, the optical splitters of the second stage, and the optical splitters of the third stage is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
The trigger system of the converter valve and the control system aiming at the direct current transmission system are characterized in that each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system; each optical splitter of the first stage is used for receiving a trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage; each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage; each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor; if the thyristors in the preset number are not normally triggered, the direct current transmission system is tripped, so that the optical splitters are redundant devices, and each group of serially connected thyristors does not correspond to the same optical splitter any more, thereby realizing that the normal triggering of the converter valve cannot be influenced when any optical splitter in a loop is in fault, and greatly improving the working stability and reliability of the direct current transmission system.
Drawings
FIG. 1 is a diagram of converter valve electrical connections in a DC power transmission system according to one embodiment;
fig. 2 is a diagram of an application scenario of a triggering system for a converter valve and a control system for a dc power transmission system in an embodiment;
FIG. 3 is a schematic diagram of an embodiment of a HVDC control system triggering a converter valve control system;
FIG. 4 is a diagram of an application scenario based on the master-slave converter valve control system in an embodiment;
fig. 5 is a diagram of an application scenario based on a non-redundant optical splitter in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In a dc transmission system, the normal triggering of converter valves requires: the converter valve control system controls the light emitting plate to emit trigger pulse, and the trigger pulse is transmitted to the trigger end of the thyristor converter valve through the optical fiber. Fig. 1 is an electrical connection diagram of a converter valve commonly used in engineering, and a valve at a square frame in the diagram is generally formed by connecting 4 groups of 13 thyristors in series at an engineering site, and the operating states of the 4 × 13 thyristors are kept consistent.
In one embodiment, taking the triggering of a group of 1 × 13 thyristors as an example, as shown in fig. 2, there is provided a triggering system of a converter valve, the triggering system comprising: the optical fiber module comprises a light emitting plate and three levels of optical splitters;
each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system;
each optical splitter of the first stage is used for receiving a trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage;
each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage;
each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor; and if the preset number of thyristors are not normally triggered, tripping the direct current transmission system.
In direct current transmission, when a converter valve control system considers that the number of faults of a thyristor exceeds a threshold value (currently, the number of faults cannot exceed 5 in each valve of 4 × 13 in direct current engineering), the corresponding direct current transmission system can be directly tripped.
The system for triggering the converter valve comprises: the optical fiber module comprises a light emitting plate and three levels of optical splitters; each two light emitting plates send out trigger pulses under the control of the same converter valve control system; each optical splitter of the first stage is used for receiving a trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage; each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage; each optical splitter of the third stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the second stage and sending the trigger pulses to a thyristor in the converter valve so as to trigger the thyristor; if the thyristors in the preset number are not normally triggered, the direct current transmission system is tripped, so that the optical splitters are redundant devices, and each group of serially connected thyristors does not correspond to the same optical splitter any more, thereby realizing that the normal triggering of the converter valve cannot be influenced when any optical splitter in a loop is in fault, and greatly improving the working stability and reliability of the direct current transmission system.
In one embodiment, the trigger conditions for the light emitting panel to be controlled by the converter valve control system are: and the high-voltage direct-current control system issues a trigger instruction to the converter valve control system.
With reference to fig. 3, when the converter valve control system receives a trigger instruction issued by the hvdc control system, control information is sent to the corresponding transmitting plate, and the corresponding transmitting plate is controlled to send a trigger pulse.
In one embodiment, the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
Referring to fig. 4, the converter valve control system a is a main converter valve control system, and the converter valve control system B is a standby converter valve control system.
In one embodiment, the distribution for the above-mentioned trigger pulses is an average distribution.
The optical splitter realizes the function of internally coupling the trigger pulses at all input ends and then averagely distributing the trigger pulses into a plurality of trigger pulses to be output through the output ends.
In one embodiment, the number ratio of the converter valve control system, the light emitting plate, the first stage of optical splitter, the second stage of optical splitter and the third stage of optical splitter is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
As described with reference to fig. 4, the main converter valve control system a controls 2 light emitting panels A1 and A2, the light emitting panel A1 sends a trigger pulse to a first-stage optical splitter a11, the light emitting panel A2 sends a trigger pulse to a first-stage optical splitter a22, at this time, the first-stage optical splitters a11 and a22 distribute the trigger pulse to each second-stage optical splitter 1 and 2, the second-stage optical splitters 1 and 2 couple and distribute the trigger pulse to each third-stage optical splitter, and each third-stage optical splitter sends the trigger pulse to a thyristor for triggering the thyristor. The converter valve control system B controls 2 light emitting plates B1 and B2, the light emitting plate B1 sends trigger pulses to a first-stage optical splitter B11, the light emitting plate B2 sends the trigger pulses to a first-stage optical splitter B22, the first-stage optical splitters B11 and B22 distribute the trigger pulses to each second-stage optical splitter 1 and each second-stage optical splitter 2 couple the trigger pulses and distribute the trigger pulses to each third-stage optical splitter, and each third-stage optical splitter sends the trigger pulses to a thyristor for triggering the thyristor. In this case, no matter what the number of the second-stage optical splitters and the number of the third-stage optical splitters are changed, as long as each second-stage optical splitter receives the trigger pulse sent by each first-stage optical splitter, each third-stage optical splitter receives the laser pulse sent by each second-stage optical splitter, and then sends the trigger pulse to each thyristor, the normal triggering of the converter valve cannot be influenced if any optical splitter in the loop is in fault.
In one embodiment, there is provided a control system for a dc power transmission system, the control system comprising, with reference to fig. 2:
a trigger system, a converter valve control system, a converter valve as in any of the embodiments; the converter valve comprises a plurality of groups of thyristors, each thyristor in each group of thyristors is connected in series, and the running states of each thyristor in the plurality of groups of thyristors are consistent;
the single converter valve control system is used for controlling the two light emitting plates of the trigger system to send out trigger pulses;
and if the thyristors in the converter valve are not normally triggered by the preset number, tripping the direct current transmission system.
In the control system for the direct current transmission system, each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system; each optical splitter of the first stage is used for receiving the trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage; each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage; each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor; if the thyristors in the preset number are not normally triggered, the direct current transmission system is tripped, so that the optical splitters are redundant devices, and each group of serially connected thyristors does not correspond to the same optical splitter any more, thereby realizing that the normal triggering of the converter valve cannot be influenced when any optical splitter in a loop is in fault, and greatly improving the working stability and reliability of the direct current transmission system.
In one embodiment, the trigger conditions for the light emitting panel to be controlled by the converter valve control system are: and the high-voltage direct-current control system issues a trigger instruction to the converter valve control system.
In one embodiment, the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
In one embodiment, the distribution for the above-mentioned trigger pulses is an average distribution.
In one embodiment, the number ratio of the converter valve control system, the light emitting plate, the first stage of optical splitter, the second stage of optical splitter and the third stage of optical splitter is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
In order to better understand the above method, an application example of a control system for a dc power transmission system according to the present application is described in detail below.
In direct current transmission, the normal triggering of converter valves requires: the converter valve control system controls the light emitting plate to emit trigger pulse, and the trigger pulse is transmitted to the trigger end of the thyristor converter valve through the optical fiber. Fig. 1 is an electrical connection diagram of a converter valve common to engineering, and a valve at a block in the diagram is generally formed by connecting 4 groups of 13 thyristors in series at an engineering site, and the operating states of the 4 × 13 thyristors are kept consistent. Taking the trigger circuit of one group of 1 × 13 thyristors as an example, the system structure in the prior art is described with reference to fig. 5:
the converter valve control system is divided into two sets AB (one master and one slave), when the master converter valve control system works normally, the slave converter valve control system does not work, the converter valve control system is used for receiving a trigger instruction issued by the high-voltage direct-current control system and controlling the two light emitting board cards to send out trigger laser pulses, the trigger pulses are input into the optical splitter (the optical splitter realizes the function of evenly distributing the trigger pulses at all input ends into a plurality of trigger pulses after being internally coupled and then outputting the trigger pulses through the output ends, the number of the input ends is n, the number of the output ends is m, the trigger pulses can be called n multiplied by m optical splitters), and the optical splitter outputs 13 trigger pulses to each thyristor to trigger the thyristor.
With reference to fig. 5, it can be seen that the optical splitters are non-redundant devices (each group of thyristors connected in series corresponds to only 1 optical splitter), if the optical splitter is damaged, the corresponding 13 thyristors cannot be normally triggered, and when the converter valve control system determines that the number of failed thyristors exceeds a threshold (the number of failed thyristors cannot exceed 5 in each 4 × 13 valve in the current dc engineering), the corresponding dc power transmission system is directly tripped, which greatly affects the stability and reliability of the dc power transmission system.
As described with reference to fig. 4, in the present embodiment, the converter valve includes a plurality of groups of thyristors, each thyristor in each group of thyristors is connected in series, and each thyristor in the plurality of groups of thyristors has a consistent operation state;
each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system;
the triggering conditions of the light emitting plate controlled by the converter valve control system are as follows: and the high-voltage direct-current control system sends a trigger instruction to the converter valve control system. When the converter valve control system receives a trigger instruction sent by the high-voltage direct-current control system, control information is sent to the corresponding transmitting plate, and the corresponding transmitting plate is controlled to send out trigger pulses. The converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
Each optical splitter of the first stage is used for receiving the trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage; each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage; each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor;
and if the thyristors in the preset number are not normally triggered, tripping the direct-current transmission system.
The distribution of the trigger pulses is equal distribution, and the optical splitter realizes the function of internally coupling the trigger pulses at all input ends and then equally distributing the trigger pulses to a plurality of trigger pulses again to output the trigger pulses through the output ends. In this embodiment, the ratio of the number of the converter valve control system, the light emitting panel, the first stage optical splitter, the second stage optical splitter, and the third stage optical splitter is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
As described with reference to fig. 4, the main converter valve control system a controls 2 light emitting panels A1 and A2, the light emitting panel A1 sends a trigger pulse to a first-stage optical splitter a11, the light emitting panel A2 sends a trigger pulse to a first-stage optical splitter a22, at this time, the first-stage optical splitters a11 and a22 distribute the trigger pulse to each second-stage optical splitter 1 and 2, the second-stage optical splitters 1 and 2 couple and distribute the trigger pulse to each third-stage optical splitter, and each third-stage optical splitter sends the trigger pulse to a thyristor for triggering the thyristor. The standby converter valve control system B controls 2 light emitting boards B1 and B2, the light emitting board B1 sends trigger pulses to a first-stage optical splitter B11, the light emitting board B2 sends the trigger pulses to a first-stage optical splitter B22, the first-stage optical splitters B11 and B22 distribute the trigger pulses to each second-stage optical splitter 1 and each second-stage optical splitter 2 couple the trigger pulses and distribute the trigger pulses to each third-stage optical splitter, and each third-stage optical splitter sends the trigger pulses to a thyristor for triggering the thyristor. In this case, no matter what the number of the second-stage optical splitters and the number of the third-stage optical splitters are changed, as long as each second-stage optical splitter receives the trigger pulse sent by each first-stage optical splitter, each third-stage optical splitter receives the laser pulse sent by each second-stage optical splitter, and then sends the trigger pulse to each thyristor, the normal triggering of the converter valve cannot be influenced if any optical splitter in the loop is in fault.
In the control system for the direct current transmission system, each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system; each optical splitter of the first stage is used for receiving the trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage; each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage; each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor; if the thyristors in the preset number are not normally triggered, the direct current transmission system is tripped, so that the optical splitters are redundant devices, and each group of serially connected thyristors does not correspond to the same optical splitter any more, thereby realizing that the normal triggering of the converter valve cannot be influenced when any optical splitter in a loop is in fault, and greatly improving the working stability and reliability of the direct current transmission system.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. A system for triggering a converter valve, the system comprising: the optical fiber comprises an optical transmitting plate and three levels of optical splitters;
each two light emitting plates are used for sending out trigger pulses under the control of the same converter valve control system;
each optical splitter of the first stage is used for receiving a trigger pulse sent by one light emitting plate and distributing the trigger pulse to all the optical splitters of the second stage;
each optical splitter of the second stage is used for receiving and coupling the trigger pulses sent by all the optical splitters of the first stage, and distributing the trigger pulses obtained by coupling to all the optical splitters of the third stage;
each optical splitter of the third stage is used for receiving and coupling the trigger pulse sent by all the optical splitters of the second stage and sending the trigger pulse to a thyristor in the converter valve so as to trigger the thyristor;
and if the preset number of thyristors are not normally triggered, tripping the direct current transmission system.
2. The trigger system of claim 1, wherein the trigger condition for the light emitting panel being controlled by the converter valve control system is: and the high-voltage direct-current control system sends a trigger instruction to the converter valve control system.
3. The trigger system of claim 1, wherein the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be communicated with each other, and when the main converter valve control system works normally, the standby converter valve control system does not work.
4. The trigger system of claim 1, wherein the distribution for the trigger pulses is an average distribution.
5. The trigger system of claim 1, wherein the ratio of the number of converter valve control systems, light emitter plates, optical splitters of the first stage, optical splitters of the second stage, and optical splitters of the third stage is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
6. A control system for a direct current power transmission system, the control system comprising:
the triggering system, converter valve control system, converter valve of any of claims 1 to 5; the converter valve comprises a plurality of groups of thyristors, wherein each thyristor in each group of thyristors is connected in series, and the running states of each thyristor in the plurality of groups of thyristors are consistent;
the single converter valve control system is used for controlling the two light emitting plates of the trigger system to send out trigger pulses;
and if the thyristors in the converter valve are not normally triggered by the preset number, tripping the direct current transmission system.
7. The control system of claim 6, wherein the converter valve control system is configured to control a light emitting plate of the trigger system to emit a trigger pulse when receiving a trigger instruction issued by the HVDC control system.
8. The control system of claim 6, wherein the converter valve control system comprises: the main converter valve control system and the standby converter valve control system can be in intersystem communication, and when the main converter valve control system works normally, the standby converter valve control system does not work.
9. Control system according to claim 6, characterized in that the allocation for trigger pulses is an average allocation.
10. The control system of claim 6, wherein the number ratio of the converter valve control system, the light emitting panel, the first stage optical splitter, the second stage optical splitter, and the third stage optical splitter is 1:2:2: a: b, wherein a and b are natural numbers greater than 0.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211170344.8A CN115622374B (en) | 2022-09-22 | 2022-09-22 | Trigger system of converter valve and control system for direct current transmission system |
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| CN202211170344.8A CN115622374B (en) | 2022-09-22 | 2022-09-22 | Trigger system of converter valve and control system for direct current transmission system |
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Citations (7)
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