CN115219158A - Thyristor converter valve detection circuit and method thereof - Google Patents
Thyristor converter valve detection circuit and method thereof Download PDFInfo
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- CN115219158A CN115219158A CN202210839851.XA CN202210839851A CN115219158A CN 115219158 A CN115219158 A CN 115219158A CN 202210839851 A CN202210839851 A CN 202210839851A CN 115219158 A CN115219158 A CN 115219158A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/263—Circuits therefor for testing thyristors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
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Abstract
The application relates to a thyristor converter valve detection circuit and a method thereof. The method comprises the following steps: the device comprises a control circuit, at least one optical splitter, at least one thyristor and two optical receiving board cards; the two optical receiving board cards are connected with the control circuit and the at least one optical splitter; the optical splitter is connected with the thyristor; and the control circuit is used for sending a test pulse to the optical splitter and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter, so that the reliability of the circuit is improved. Whether this scheme of adoption can judge optical divider breaks down.
Description
Technical Field
The application relates to the technical field of direct current transmission, in particular to a thyristor converter valve detection circuit and a thyristor converter valve detection method.
Background
The direct current transmission is a transmission mode that alternating current generated by a power plant is converted into direct current through a rectifier and transmitted to a receiving end, and then the direct current is converted into alternating current through an inverter and transmitted to a receiving end alternating current power grid.
In the current direct current transmission project, an optical signal for triggering the thyristor can be transmitted through the optical splitter, so that the thyristor cannot be triggered when the optical splitter fails. Generally, the optical splitter can be detected whether it is faulty by transmitting a test pulse to the optical splitter.
However, the method for detecting whether the optical splitter has a fault or not has the problem that the fault is not accurately detected.
Disclosure of Invention
In view of the above, it is desirable to provide a thyristor converter valve detection circuit and a method thereof.
In a first aspect, the present application provides a thyristor converter valve detection circuit. The method comprises the following steps: the optical transceiver comprises a control circuit, at least one optical splitter, at least one thyristor and two optical receiving board cards; the two optical receiving board cards are connected with the control circuit and the at least one optical splitter; the optical splitter is connected with the thyristor:
the control circuit is used for sending test pulses to the optical splitter and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
In one embodiment, the control circuit is specifically configured to:
determining that the optical splitter fails under the condition that the return detection signals fed back by the two optical receiving board cards are not received;
and determining that the optical splitter is normal under the condition of receiving the return detection signal fed back by at least one optical receiving board card.
In one embodiment, the thyristor converter valve detection circuit further comprises a first switching circuit, a second switching circuit and a trip loop; the first end of the first switch circuit is connected with the control circuit, the second end of the first switch circuit is connected with the first end of the second switch circuit, and the second end of the second switch circuit is connected with the trip loop;
the control circuit is used for controlling the first switch circuit and the second switch circuit to be in a conducting state when the optical splitter is in fault so as to trigger the tripping loop.
In one embodiment, the thyristor converter valve detection circuit further comprises an alarm circuit; the first end of the alarm loop is connected with the second end of the first switch circuit;
the control circuit is further configured to control the first switch circuit to be in a conducting state when the optical splitter fails, so as to trigger the alarm loop.
In one embodiment, the control circuit is specifically configured to:
when the optical splitter has a fault and the fault does not need tripping processing, the first switch circuit is controlled to be switched on so as to trigger the alarm loop, and the second switch circuit is controlled to be switched off so as to prevent the alarm loop from being triggered.
In a second aspect, the application further provides a thyristor converter valve detection method. The method comprises the following steps:
sending a test pulse to the optical splitter;
and determining whether the optical splitter fails according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
In one embodiment, the determining whether the optical splitter is faulty according to the feedback detection signals fed back by the two optical receiving boards based on the output signals of the optical splitter includes:
if the return detection signals fed back by the two optical receiving board cards are not received, determining that the optical splitter fails;
and if the return detection signal fed back by at least one optical receiving board card is received, determining that the optical splitter is normal.
In one embodiment, if the optical splitter fails, the first switching circuit and the second switching circuit are both controlled to be in a conducting state to trigger the trip loop.
In one embodiment, if the optical splitter fails, the first switching circuit is controlled to be in a conducting state to trigger the alarm loop.
In a third aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
sending a test pulse to the optical splitter;
and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
In a fourth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:
sending a test pulse to the optical splitter;
and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
whether the optical divider breaks down or not is judged by arranging the two optical receiving board cards, whether the optical divider is normal or not is judged according to the number of the return detection signals received by the control circuit, the reliability of the circuit is improved, the problem that the whole circuit breaks down due to misjudgment of the wiring problem of the optical divider and the optical receiving board cards is solved, and the operation difficulty of troubleshooting of the whole circuit is reduced.
Drawings
Fig. 1 is a block diagram of a detection circuit of a thyristor converter valve according to an embodiment of the present disclosure;
fig. 2 is a block diagram of another thyristor converter valve detection circuit according to an embodiment of the present disclosure;
fig. 3 is a block diagram of another thyristor converter valve detection circuit according to an embodiment of the present disclosure;
fig. 4 is a block diagram of another thyristor converter valve detection circuit according to an embodiment of the present disclosure;
fig. 5 is a block diagram of another thyristor converter valve detection circuit according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a method for detecting a thyristor converter valve according to an embodiment of the present application;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
The reference numbers in the specific implementation method are as follows:
the control circuit: 110 310, optical splitter: 120 320, respectively; a thyristor: 130 330; the light receiving board card: 140 340, 340; a control circuit A; a control circuit B; a light emitting board card C; a light emitting board card D; a light emitting board card E; an optical splitter F; an optical splitter G; an optical splitter P; an optical splitter Q; a light receiving board card M; a light receiving board card N; a first switching circuit: 405 505; a second switching circuit: 406 506; a trip loop: 407 507, a; an alarm loop: 508.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The direct current transmission is a transmission mode in which alternating current generated by a power plant is converted into direct current by a rectifier and transmitted to a receiving end, and the direct current is converted into alternating current by an inverter and transmitted to a receiving end alternating current power grid. In the current direct current transmission project, an optical signal for triggering the thyristor can be transmitted through the optical splitter, so that the thyristor cannot be triggered when the optical splitter fails. Generally, the optical splitter can be detected whether it is faulty by transmitting a test pulse to the optical splitter.
The application provides a thyristor converter valve detection circuit and a thyristor converter valve detection method. Therefore, the reliability of the equipment is improved, the phenomenon that the whole circuit is mistakenly considered to be in fault due to the wiring problem or the fault of the element body is prevented, and the operation difficulty of troubleshooting the fault of the whole circuit is reduced. Specifically, the thyristor converter valve detection circuit and the method thereof according to the embodiments of the present application are described below with reference to the drawings.
Fig. 1 is a block diagram of a thyristor converter valve detection circuit according to an embodiment of the present disclosure, and as shown in fig. 1, the thyristor converter valve detection circuit may include: the control circuit 110, at least one optical splitter 120, at least one thyristor 130 and two optical receiving boards 140; the two optical receiving board cards 140 are both connected with the control circuit 110 and the at least one optical splitter 120; the optical splitter 120 is connected to the thyristor 130;
the control circuit 110 is configured to send a test pulse to the optical splitter 120, and determine whether the optical splitter 120 fails according to a return detection signal fed back by the two optical receiving boards 140 based on the output signal of the optical splitter 120.
It should be noted that the return detection signal is a signal sent by the optical splitter 120 to the light receiving board after acquiring the test pulse sent by the control circuit 110; the test pulse is a pulse that the control circuit 110 continuously sends to the optical splitter 120 when the thyristor 130 is in the off period, and the test pulse is not enough to trigger the thyristor 130.
In some embodiments of the present application, the control circuit 110 sends test pulses to the two optical splitters 120 simultaneously, the optical splitter 120 sends back the test signals to the two optical receiving boards 140 after receiving the test pulses, each optical splitter 120 sends back the test signals to the two optical receiving boards 140 respectively, and the two optical receiving boards 140 feed back the test signals to the control circuit 110 after receiving the test signals.
In some embodiments of the present application, as shown in fig. 2, it is assumed that the thyristor converter valve detection circuit includes two control circuits (control circuit a and control circuit B, respectively), three light emitting boards (light emitting board C, light emitting board D, and light emitting board E, respectively), four optical splitters (optical splitter F, optical splitter G, optical splitter P, and optical splitter Q, respectively), two light receiving boards (including light receiving board M and light receiving board N), and a plurality of thyristors. The thyristor converter valve detection circuit has the following connection relationship: the output ends of the control circuit A are connected with the input ends of the three light emitting boards, the output end of the control circuit B is connected with the input ends of the three light emitting boards, the output ends of the three light emitting boards are connected with the input end of the optical splitter F, the output ends of the three light emitting boards are connected with the input end of the optical splitter G, the output ends of the three light emitting boards are connected with the input end of the optical splitter P, the output ends of the three light emitting boards are connected with the input end of the optical splitter Q, the output ends of the four optical splitters are connected with the thyristors, the input end of the light receiving board M is connected with the four splitters, and the output end of the light receiving board M is connected with the input end of the control circuit A; the input end of the light receiving board card N is connected with the four optical splitters, and the output end of the light receiving board card N is connected with the input end of the control circuit B.
According to the connection relationship of the thyristor converter valve detection circuit in the embodiment, when the thyristor is in the turn-off period, the control system a and the control system B respectively transmit a test pulse to the three light emitting boards, the test pulse is not enough to trigger the thyristor, the test pulse is transmitted to the four optical splitters through the three light emitting boards, the four optical splitters respectively transmit a detection signal back to the light receiving board M and the light receiving board N after receiving the test pulse, and the light receiving board M and the light receiving board N respectively transmit the received back detection signal to the control circuit a and the control circuit B. If the control circuit a and the control circuit B do not receive the return detection signals sent by the light receiving board card M and the light receiving board card N, it indicates that the optical splitter is in a fault state at this time, and if the control circuit a and the control circuit B receive the return detection signals fed back by any one of the light receiving board card M and the light receiving board card N, or if the control circuit a and the control circuit B receive the return detection signals fed back by the light receiving board card M and the light receiving board card N, it indicates that the optical splitter is normal at this time.
It should be noted that, a fault occurring in the optical splitter may be indicated as the optical splitter being unable to trigger the thyristor connected thereto. The reasons for the fault of the optical splitter may include, but are not limited to: (1) The temperature variation of the environment where the optical splitter is located exceeds the limit which the optical splitter can bear; (2) The quality of the optical splitter does not reach the standard due to process errors in the manufacturing process of the optical splitter; (3) The power applied to the optical splitter exceeds the limit that the optical splitter can withstand.
According to the thyristor converter valve detection circuit, whether the optical divider breaks down or not is judged by arranging the two optical receiving board cards, whether the optical divider is normal or not is judged according to the number of the return detection signals received by the control circuit, the reliability of the circuit is improved, the problem that the optical divider and the optical receiving board cards are connected in a wiring mode is solved, the whole circuit is mistakenly considered to break down, and the operation difficulty of troubleshooting the whole circuit is reduced.
It should be noted that, whether the optical splitter fails or not may be determined by determining a return detection signal fed back by the optical receiving board, and optionally, as shown in fig. 1, the control circuit is specifically configured to:
determining that the optical splitter 120 has a fault when the return detection signals fed back by the two optical receiving board cards 140 are not received; and determining that the optical splitter 120 is normal when the return detection signal fed back by the at least one optical receiving board 140 is received.
As an implementation manner, as shown in fig. 3, when the thyristor converter valve detection circuit includes three light receiving board cards, the connection manner of the thyristor converter valve detection circuit is as follows: the control circuit sends test pulses to the two optical splitters simultaneously, the optical receiving board cards send back detection signals after the optical splitters receive the test pulses, each optical splitter sends back detection signals to the three optical receiving board cards, and the three optical receiving board cards all feed back the detection signals to the control circuit after receiving the detection signals. Wherein the control circuit is specifically configured to: under the condition that the return detection signals fed back by the three light receiving board cards 340 are not received, determining that the optical splitter 320 has a fault; and determining that the optical splitter 320 is normal when the return detection signal fed back by the at least one optical receiving board card 340 is received.
According to the thyristor converter valve detection circuit, whether the optical divider breaks down or not is judged by arranging the plurality of optical receiving board cards, the reliability of the circuit is improved, the problem of wiring between the optical divider and the optical receiving board cards is solved, the whole circuit is mistakenly judged to break down, whether the optical divider is normal or not is judged according to the number of the return detection signals received by the control circuit, and the operation difficulty of judging the circuit faults is reduced.
It should be noted that, in order to achieve the purpose of autonomously selecting whether to trigger the trip circuit when the optical splitter fails, a second switching circuit and a trip circuit may be added to achieve the purpose, and optionally, as shown in fig. 3, fig. 4 is a block diagram of another thyristor converter valve detection circuit provided in the embodiment of the present application, where the thyristor converter valve detection circuit further includes: a first switching circuit 405, a second switching circuit 406, and a trip circuit 407.
A first end of the first switch circuit 405 is connected to the control circuit, a second end of the first switch circuit 405 is connected to a first end of the second switch circuit 406, and a second end of the second switch circuit 406 is connected to the trip circuit 407;
and the control circuit is used for controlling the first switch circuit 405 and the second switch circuit 406 to be in a conducting state to trigger the trip loop 407 when the optical splitter fails.
It should be noted that, when a major safety accident occurs, the personnel injury and property loss can be reduced by triggering the trip circuit, wherein the major safety accident can include but is not limited to: fire, explosion, etc.
It should be noted that, if the optical splitter fails at this time, the first switching circuit 405 is in the on state at this time, and if the optical splitter does not fail at this time, the first switching circuit 405 is in the off state at this time, and as described above, the on state and the off state of the first switching circuit 405 correspond to the optical splitter failing and failing, respectively.
In one implementation, the second switch circuit 406 may be a switching transistor, and when the voltage applied to the emitter junction of the switching transistor is less than the on-state voltage of the PN junction (the space charge region between the P-type semiconductor and the N-type semiconductor), the base current, the collector current, and the emitter current all become zero, which is equivalent to the off-state of the switch between the collector and the emitter, i.e., the off-state of the transistor, whereas when the voltage applied to the emitter junction of the switching transistor is greater than or equal to the on-state voltage of the PN junction, which is equivalent to the on-state of the switch between the collector and the emitter, i.e., the on-state of the switching transistor, when the switching transistor is in the on-state, the second switch circuit 406 is equivalent to the on-state, and when the switching transistor is in the off-state, the second switch circuit 406 is equivalent to the off-state.
In another implementation, the second switch circuit 406 may be in the form of a knife switch, which is a switch with a moving contact (knife blade) and is wedged (or separated) with a stationary contact (holder base) on the base to turn on (or off) the circuit, when the knife switch is in the closed position, the second switch circuit 406 is in the on state, and when the knife switch is in the off position, the second switch circuit 406 is in the off state.
In some embodiments of the present application, when the optical splitter fails, the first switch circuit 405 is in a conducting state, and if the second switch circuit 406 is also in a conducting state, an alarm loop may be triggered.
In some embodiments of the present application, when the optical splitter fails, the first switch circuit 405 is in a conducting state, and if the second switch circuit 406 is in an open state, the alarm loop may not be triggered.
In some embodiments of the present application, when the optical splitter is not malfunctioning, the first switching circuit 405 is in an open state at this time, and the second switching circuit 406 is in an open state at this time, the alarm loop may not be triggered.
In some embodiments of the present application, when the optical splitter is not in fault, the first switch circuit 405 is in an off state at this time, and the second switch circuit 406 is in an on state at this time, the alarm loop may not be triggered.
According to the thyristor converter valve detection circuit provided by the embodiment of the application, whether a tripping loop is triggered or not is increased by arranging the first switch circuit and the second switch circuit, the safety of the thyristor converter valve detection circuit is increased, the fact that tripping operation can be completed through the first switch circuit and the second switch circuit when major safety accidents (such as fire, explosion and the like) occur is guaranteed, and larger personnel and property losses are prevented.
It should be noted that, in order to implement automatic alarm when an optical splitter fails, an alarm loop may be added to achieve the purpose, optionally, as shown in fig. 5, fig. 5 is a block diagram of another thyristor converter valve detection circuit provided in the embodiment of the present application, where the thyristor converter valve detection circuit further includes: an alarm loop 508.
Wherein a first end of the alarm loop 508 is connected to a second end of the first switch circuit 505.
And the control circuit is further configured to control the first switch circuit 505 to be in a conducting state when the optical splitter fails, so as to trigger the alarm loop 508.
It should be noted that, if the optical splitter fails, the first switch circuit 505 is in a conducting state at this time, and the alarm loop 508 is connected to the circuit at this time to trigger the alarm loop 508; if the optical splitter is not in fault, the first switch circuit 505 is in an off state at the moment, the alarm loop 508 is not connected into the circuit at the moment, and the alarm loop 508 cannot be triggered.
In some embodiments of the present application, when the optical splitter fails and the failure does not require trip processing, the first switching circuit 505 is controlled to be turned on to trigger the alarm loop 508, and the second switching circuit 506 is controlled to be turned off to prevent triggering the alarm loop 508.
In some embodiments of the present application, the alarm modes of the alarm loop 508 are many, wherein the alarm modes may include, but are not limited to, audible and visual alarms, email alarms, and telephone alarms; wherein, the acousto-optic warning is specifically used for: when the alarm loop 508 is triggered, the alarm is sent to the field personnel through the sound-light flash of a buzzer and an LED (light-emitting diode) to alarm. The mail alert is specifically used for: when the alarm loop 508 is triggered, the alarm information is sent to a preset mailbox address in the form of an email through the network, so that the alarm is realized. Telephone alerts are specifically used for: when the alarm loop 508 is triggered, the preset mobile phone number for receiving the alarm is dialed in the first time, and after the other party answers, the detailed alarm content voice is automatically broadcasted.
According to the thyristor converter valve detection circuit, the alarm operation is carried out when the optical splitter fails by arranging the alarm loop, the safety of the thyristor converter valve detection circuit in the operation process is improved, the reliability of the thyristor converter valve detection circuit is effectively improved, and the fact that alarm information can be pushed to a manager in the first time when the thyristor converter valve detection circuit fails is guaranteed.
Based on the same inventive concept, the embodiment of the application also provides a thyristor converter valve detection method for the thyristor converter valve detection circuit. The implementation scheme for solving the problem provided by the method is similar to the implementation scheme recorded in the method, so that specific limitations in one or more embodiments of the method for detecting the thyristor converter valve provided below can be referred to the limitations of the thyristor converter valve detection circuit in the foregoing, and details are not repeated herein.
Fig. 6 is a flowchart of a method for detecting a thyristor converter valve according to an embodiment of the present application, and as shown in fig. 6, the method for detecting a thyristor converter valve may include the steps of:
In an embodiment of the application, if a return detection signal fed back by two optical receiving board cards is not received, it is determined that the optical splitter fails; and if the return detection signal fed back by the at least one optical receiving board card is received, determining that the optical splitter is normal.
In one embodiment of the present application, if the optical splitter fails, the first switching circuit and the second switching circuit are both controlled to be in a conducting state, so as to trigger the trip circuit.
In an embodiment of the present application, if the optical splitter fails, the first switch circuit is controlled to be in a conducting state to trigger the alarm loop.
According to the thyristor converter valve detection method, whether the optical divider is in fault or not is judged by arranging the two optical receiving board cards, whether the optical divider is normal or not is judged according to the number of the return detection signals received by the control circuit, the reliability of equipment is improved, the problem that the optical divider and the optical receiving board cards are connected in a wiring mode is solved, the whole circuit is mistakenly considered to be in fault, and the operation difficulty of troubleshooting the whole circuit is reduced.
It should be understood that, although the steps in the flowcharts related to the above embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a part of the steps in the flowcharts related to the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
In one embodiment, a computer device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing thyristor converter valve detection data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a thyristor converter valve detection method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
and sending a test pulse to the optical splitter.
And determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the return detection signals fed back by the two optical receiving board cards are not received, determining that the optical splitter fails.
And if the return detection signal fed back by the at least one optical receiving board card is received, determining that the optical splitter is normal.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the optical divider has a fault, controlling the first switch circuit and the second switch circuit to be in a conducting state so as to trigger the tripping loop.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the optical splitter fails, controlling the first switching circuit to be in a conducting state so as to trigger the alarm loop.
In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, performs the steps of:
and sending a test pulse to the optical splitter.
And determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the return detection signals fed back by the two optical receiving board cards are not received, determining that the optical splitter fails.
And if the return detection signal fed back by the at least one optical receiving board card is received, determining that the optical splitter is normal.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the optical divider has a fault, controlling the first switch circuit and the second switch circuit to be in a conducting state so as to trigger the tripping loop.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and if the optical splitter fails, controlling the first switching circuit to be in a conducting state so as to trigger the alarm loop.
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 related to 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, databases, or other media used in the embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. 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 databases involved in the embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the various embodiments provided herein may be, without limitation, general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, or the like.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure 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 construed as limiting the scope of the present application. 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 application should be subject to the appended claims.
Claims (11)
1. A thyristor converter valve detection circuit, comprising: the optical transceiver comprises a control circuit, at least one optical splitter, at least one thyristor and two optical receiving board cards; the two optical receiving board cards are connected with the control circuit and the at least one optical splitter; the optical splitter is connected with the thyristor;
the control circuit is used for sending test pulses to the optical splitter and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
2. The thyristor converter valve detection circuit of claim 1, wherein the control circuit is specifically configured to:
determining that the optical splitter fails under the condition that the return detection signals fed back by the two optical receiving board cards are not received;
and determining that the optical splitter is normal under the condition of receiving the return detection signal fed back by at least one optical receiving board card.
3. The thyristor converter valve detection circuit of claim 1 or 2, further comprising a first switching circuit, a second switching circuit, and a trip loop; the first end of the first switch circuit is connected with the control circuit, the second end of the first switch circuit is connected with the first end of the second switch circuit, and the second end of the second switch circuit is connected with the trip loop;
the control circuit is used for controlling the first switch circuit and the second switch circuit to be in a conducting state when the optical splitter breaks down so as to trigger the tripping loop.
4. The thyristor converter valve detection circuit of claim 3, further comprising an alarm loop; the first end of the alarm loop is connected with the second end of the first switch circuit;
the control circuit is further used for controlling the first switch circuit to be in a conducting state when the optical splitter is in fault so as to trigger the alarm loop.
5. The thyristor converter valve detection circuit of claim 3, wherein the control circuit is specifically configured to:
when the optical splitter has a fault and the fault does not need tripping processing, the first switch circuit is controlled to be switched on so as to trigger the alarm loop, and the second switch circuit is controlled to be switched off so as to prevent the alarm loop from being triggered.
6. A thyristor converter valve detection method applied to a thyristor converter valve detection circuit according to any one of claims 1 to 5, the method comprising:
sending a test pulse to the optical splitter;
and determining whether the optical splitter fails or not according to the return detection signals fed back by the two optical receiving board cards based on the output signals of the optical splitter.
7. The method for detecting the thyristor converter valve according to claim 6, wherein the determining whether the optical splitter is faulty according to the feedback detection signals fed back by the two optical receiving boards based on the output signals of the optical splitter comprises:
if the return detection signals fed back by the two optical receiving board cards are not received, determining that the optical splitter has a fault;
and if the return detection signal fed back by at least one optical receiving board card is received, determining that the optical splitter is normal.
8. The thyristor converter valve testing method of claim 6, further comprising:
and if the optical splitter fails, controlling the first switch circuit and the second switch circuit to be in a conducting state so as to trigger the tripping loop.
9. The thyristor converter valve detection method of claim 6, comprising:
and if the optical splitter fails, controlling the first switching circuit to be in a conducting state so as to trigger the alarm loop.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 6 to 9.
11. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 6 to 9 when executed by a processor.
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| CN202210839851.XA CN115219158B (en) | 2022-07-18 | 2022-07-18 | Thyristor converter valve detection circuit and method thereof |
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| CN115219158B (en) | 2024-04-02 |
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