An optical fiber connection redundancy system and method for a valve control device to a thyristor

Abstract

The present invention discloses an optical fiber connection redundancy system and method from a valve control device to a thyristor, belonging to the technical field of high-voltage direct current transmission. The control chassis of the valve control device includes a transmitting board card, a receiving board card, and a main control board card. The optical fiber and the optical distributor form a two-level MSC network. The transmitting board card is connected to the trigger input end of the thyristor control board card through the two-level MSC network. The feedback signal of the thyristor control board card is connected to the receiving board card, and the transmitting board card and the receiving board card are respectively connected to the main control board card. The main control board card is used to generate and send a thyristor trigger signal or an inspection signal to the transmitting board card, obtain the feedback information of the thyristor control board card received by the receiving board card, and calculate and locate the fault position by using the feedback information of the thyristor control board card. The thyristor control board card is used to receive the thyristor trigger signal or the inspection signal sent by the transmitting board card, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board card.

Description

Technical Field

[0001] The present invention belongs to the technical field of high - voltage direct - current (HVDC) transmission, and particularly relates to an optical - fiber connection redundancy system and method from a valve control device to a thyristor. Background Art

[0002] Due to the characteristics of long transmission distance, large capacity, and low loss, HVDC transmission is the main transmission method for most under - construction and already - put - into - operation power transmission projects. As the most core component in an HVDC transmission project, the converter valve is a power device based on thyristor series technology, which completes the conversion of alternating current to direct - current rectification or alternating current to direct - current inversion under the command of a valve control device. The valve control device, as the monitoring and control device of the converter valve, can real - time control and monitor the operating state of the valve. Currently, there are two types of optical tubes for the valve control device to send trigger signals: high - power optical devices and low - power optical devices. The main difference lies in the different optical intensities of the trigger signals sent from the valve control. For a valve control using high - power optical devices, when the valve control device sends the optical trigger signal to the thyristor through an optical fiber, generally, an optical splitter is used to divide several optical trigger signals into multiple optical trigger signals to achieve the conversion of the optical intensity of the trigger signal.

[0003] Since the trigger optical tube of the valve control device using high - power optical tubes has a relatively large power, and the thyristor control board receives low - power optical signals, it must be matched through an optical splitter and an optical fiber. On the premise of ensuring the reliability of the valve control device, there are various networking methods. When a fault occurs, more devices and optical fibers are involved, and it is often difficult and time - consuming to troubleshoot. Therefore, a networking method that can not only ensure the reliability of the trigger circuit but also quickly locate faults needs to be designed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem of lacking a networking method that can ensure the reliability of the trigger circuit and quickly locate faults, and proposes an optical - fiber connection redundancy system and method from a valve control device to a thyristor.

[0005] To achieve the above - mentioned purpose, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides an optical - fiber connection redundancy system from a valve control device to a thyristor, including a valve control device, an optical splitter, an optical fiber, and a thyristor. The valve control device is connected to a thyristor control board card through an optical fiber and an optical splitter, and the thyristor control board card is connected to the thyristor;

[0007] The control chassis of the valve control device includes a transmitting board card, a receiving board card, and a main control board card. The optical fiber and the optical splitter form a two - level MSC network. The transmitting board card is connected to the trigger input end of the thyristor control board card through the two - level MSC network. The feedback signal of the thyristor control board card is connected to the receiving board card, and the transmitting board card and the receiving board card are respectively connected to the main control board card;

[0008] The main control board is used to generate and send thyristor trigger signals or inspection signals to the transmitting board, obtain the feedback information of the thyristor control board received by the receiving board, and calculate and locate the fault position by using the feedback information of the thyristor control board;

[0009] The thyristor control board is used to receive the thyristor trigger signals or inspection signals sent by the transmitting board, control the conduction of the thyristor according to the thyristor trigger signals, and send feedback information to the receiving board.

[0010] Further, the two-level MSC networking includes a first-level MSC networking and a second-level MSC networking. The electrical signal output end of the main control board is connected to the electrical signal input end of the transmitting board. The optical signal output end of the transmitting board is connected to the optical signal input end of the first-level MSC networking. The optical signal output end of the first-level MSC networking is connected to the optical signal input end of the second-level MSC networking. The optical fiber output end of the second-level MSC networking is connected to the optical fiber input end of the thyristor control board. The optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board. The electrical signal output end of the receiving board is connected to the electrical signal input end of the main control board.

[0011] Further, a plurality of groups of thyristors are provided, and each group has a plurality of thyristors. A plurality of groups of thyristor control boards are provided, and each group has a plurality of thyristor control boards. One thyristor control board is connected to one thyristor. A plurality of optical fibers are connected between the optical splitter of a single second-level MSC networking and a single group of thyristor control boards. A plurality of optical fibers are connected between a single group of thyristor control boards and a single receiving board. A single receiving board is provided with a plurality of optical fiber channels, and one optical fiber channel is connected to one optical fiber.

[0012] Further, the transmitting board is provided with optical tubes. A plurality of transmitting boards are provided, and the number of optical tubes of a single transmitting board is set to be a plurality. The output end of the optical splitter of a single first-level MSC networking is provided with a plurality.

[0013] Further, the optical tube of the transmitting board is connected to the input end of the optical splitter of the first-level MSC networking, and the output end of the optical splitter of the first-level MSC networking is connected to the optical splitter of the second-level MSC networking.

[0014] Further, the transmitting board includes a first transmitting board and a second transmitting board. The optical tubes include a first optical tube and a second optical tube. The first-level MSC networking includes a first optical splitter and a second optical splitter;

[0015] The first input end of the first optical splitter is connected to the optical signal output end of the first optical tube of the first transmitting board, and the second input end of the first optical splitter is connected to the optical signal output end of the first optical tube of the second transmitting board;

[0016] The four output ends of the first optical splitter are respectively connected to the optical splitters of the second-level MSC network;

[0017] The first input end of the second optical splitter is connected to the optical signal output end of the second optical tube of the first transmitting board card, and the second input end of the second optical splitter is connected to the optical signal output end of the second optical tube of the second transmitting board card;

[0018] The four output ends of the second optical splitter are respectively connected to the optical splitters of the second-level MSC network.

[0019] Further, the second-level MSC network includes a third optical splitter, a fourth optical splitter, a fifth optical splitter, and a sixth optical splitter;

[0020] The first output end of the first optical splitter is connected to the first input end of the third optical splitter, the second output end of the optical splitter of the first-level MSC network is connected to the first input end of the fourth optical splitter, the third output end of the optical splitter of the first-level MSC network is connected to the first input end of the fifth optical splitter, and the fourth output end of the optical splitter of the first-level MSC network is connected to the first input end of the sixth optical splitter;

[0021] The first output end of the second optical splitter is connected to the second input end of the third optical splitter, the second output end of the second optical splitter is connected to the second input end of the fourth optical splitter, the third output end of the second optical splitter is connected to the second input end of the fifth optical splitter, and the fourth output end of the second optical splitter is connected to the second input end of the sixth optical splitter;

[0022] The thyristor control board card includes a first group of thyristor control board cards, a second group of thyristor control board cards, a third group of thyristor control board cards, and a fourth group of thyristor control board cards;

[0023] The output end of the third optical splitter is fiber-connected to one end of the first group of thyristor control board cards, the output end of the fourth optical splitter is fiber-connected to one end of the second group of thyristor control board cards, the output end of the fifth optical splitter is fiber-connected to one end of the third group of thyristor control board cards, and the output end of the sixth optical splitter is fiber-connected to one end of the fourth group of thyristor control board cards.

[0024] Further, the receiving board card includes a first receiving board card, a second receiving board card, a third receiving board card, and a fourth receiving board card. The other end of the first group of thyristor control board cards is fiber-connected to the first receiving board card, the other end of the second group of thyristor control board cards is fiber-connected to the second receiving board card, the other end of the third group of thyristor control board cards is fiber-connected to the third receiving board card, and the other end of the fourth group of thyristor control board cards is fiber-connected to the fourth receiving board card.

[0025] In a second aspect, the present invention provides a fiber optic connection redundancy control method from a valve control device to a thyristor, using the fiber optic connection redundancy system from a valve control device to a thyristor described above. The method includes the following steps:

[0026] When the master control board card determines that the thyristor has the conduction condition, the master control board card sends a trigger signal to the optical emission board card, and the emission board card simultaneously sends the trigger signal through a plurality of optical signal output ends. The trigger signal reaches the thyristor control board card through the optical distributor and the optical fiber to turn on the thyristor;

[0027] When the thyristor does not have the conduction condition, the master control board card controls the plurality of optical signal output ends of the emission board card to sequentially send inspection signals, and after the receiving board card receives the inspection signals returned by the thyristor control board card, it forwards them to the master control board card.

[0028] Further, the master control board card calculates whether the system is normal based on the status of the returned inspection signals and determines the fault point.

[0029] Compared with the prior art, the present invention has the following beneficial technical effects:

[0030] For the fiber optic connection redundancy system from a valve control device to a thyristor proposed by the present invention, the valve control device distributes the trigger signal to the optical distributor on the thyristor side through the optical distributor on the valve control side, and the optical distributor on the thyristor side further distributes the trigger signal to each thyristor, realizing multi-loop triggering of the trigger signal. At the same time, when the thyristor does not have the conduction condition, the valve control device sends inspection signals, calculates the signals returned by the thyristor, and finally determines whether there is a trigger loop fault and determines the fault point. It can realize redundant configuration of the trigger signal and online operation positioning of the fault, which can not only ensure the availability and reliability of the valve control device and the thyristor, but also quickly and accurately locate the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0032] Figure 1 It is a schematic diagram of a control chassis of a valve control device of a fiber optic connection redundancy system from a valve control device to a thyristor according to the present invention.

[0033] Figure 2 It is a schematic diagram of the fiber optic connection of a fiber optic connection redundancy system from a valve control device to a thyristor according to the present invention.

[0034] Among them, 1 is the master control board card, 2 is the emission board card, and 3 is the receiving board card. DETAILED DESCRIPTION OF THE INVENTION

[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] Embodiment 1

[0040] An optical fiber connection redundancy system from a valve control device to a thyristor, comprising a valve control device, an optical splitter, an optical fiber and a thyristor. The valve control device is connected to a thyristor control board through the optical fiber and the optical splitter, and is used to control operations such as the opening and closing of the valve. The thyristor control board is connected to the thyristor;

[0041] The control chassis of the valve control device includes a transmitting board 2, a receiving board 3, and a main control board 1, which is the control center of the valve control device. The optical fiber and the optical splitter form a two-level MSC (Multiple Star Coupler, optical splitter) network. The transmitting board 2 is connected to the trigger input end of the thyristor control board through the two-level MSC network. The feedback signal of the thyristor control board is connected to the receiving board 3, and the transmitting board 2 and the receiving board 3 are respectively connected to the main control board 1;

[0042] The transmitting board 2 is used to receive the thyristor trigger signal or the inspection signal generated by the main control board 1 and forward it to the thyristor control board through the two-level MSC network; it is connected to the main control board 1 through an electrical signal;

[0043] The receiving board 3 is used to receive the feedback signal of the thyristor control board and forward it to the main control board 1; it is connected to the main control board 1 through an electrical signal;

[0044] The main control board 1 is used to generate and send the thyristor trigger signal or the inspection signal to the transmitting board 2, obtain the feedback information of the thyristor control board received by the receiving board 3, and use the feedback information of the thyristor control board to calculate and locate the fault position; it is connected to the transmitting board 2 and the receiving board 3 respectively through electrical signals.

[0045] The thyristor control board is used to receive the thyristor trigger signal or the inspection signal sent by the transmitting board 2, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board 3. It is connected to the transmitting board 2 and the receiving board 3 through the optical splitter and the optical fiber, and is connected to the thyristor through an electrical signal.

[0046] The working process of the system is as follows: The main control board 1 generates the thyristor trigger signal or the inspection signal and sends it to the transmitting board 2. After receiving the signal, the transmitting board 2 forwards it to the thyristor control board through the two-level MSC network. The thyristor control board controls the conduction of the thyristor according to the received signal and generates feedback information. The feedback information is sent to the receiving board 3 through the optical fiber. After receiving the feedback information, the receiving board 3 forwards it to the main control board 1. The main control board 1 uses the feedback information for analysis and processing, such as locating the fault position, etc.

[0047] Preferably, the two - level MSC networking includes a first - level MSC networking and a second - level MSC networking. The electrical signal output end of the main control board 1 is connected to the electrical signal input end of the transmitting board 2. The optical signal output end of the transmitting board 2 is connected to the optical signal input end of the first - level MSC networking. The optical signal output end of the first - level MSC networking is connected to the optical signal input end of the second - level MSC networking. The optical fiber output end of the second - level MSC networking is connected to the optical fiber input end of the thyristor control board. The optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board 3. The electrical signal output end of the receiving board 3 is connected to the electrical signal input end of the main control board 1.

[0048] The first - level MSC networking, as the first level of signal transmission, is responsible for the preliminary distribution and transmission of the optical signal output by the transmitting board 2. Its input end receives the optical signal output of the transmitting board 2, and its output end transmits the distributed optical signal to the second - level MSC networking. The second - level MSC networking, as the second level of signal transmission, further distributes and transmits the optical signal received from the first - level MSC networking to ensure that the signal can accurately reach each thyristor control board. Its input end receives the optical signal output of the first - level MSC networking, and its output end transmits the signal to the optical fiber input end of the thyristor control board through an optical fiber. The electrical signal output end of the main control board 1 is connected to the electrical signal input end of the transmitting board 2, which is used to send thyristor trigger signals or inspection signals. The electrical signal input end of the main control board 1 is connected to the electrical signal output end of the receiving board 3, which is used to receive feedback information. The electrical signal input end of the transmitting board 2 receives the electrical signal output of the main control board 1. The optical signal output end of the transmitting board 2 converts the electrical signal into an optical signal and outputs it to the optical signal input end of the first - level MSC networking. The optical fiber input end of the thyristor control board receives the optical signal transmitted by the second - level MSC networking, and the optical fiber output end sends feedback information to the optical fiber input end of the receiving board 3. The optical fiber input end of the receiving board 3 receives the feedback information sent by the thyristor control board. The electrical signal output end of the receiving board 3 converts the optical signal into an electrical signal and outputs it to the electrical signal input end of the main control board 1.

[0049] The working process of the system is as follows: The main control board 1 generates a thyristor trigger signal or an inspection signal and sends it to the transmitting board 2 through an electrical signal. The transmitting board 2 converts the received electrical signal into an optical signal and outputs it to the first - level MSC networking. The first - level MSC networking conducts preliminary distribution and transmission of the optical signal and then sends it to the second - level MSC networking. The second - level MSC networking further distributes and transmits the optical signal to ensure that the signal can accurately reach each thyristor control board. The thyristor control board receives the optical signal and controls the conduction state of the thyristor according to the signal content, and at the same time generates feedback information. The feedback information is sent back to the receiving board 3 through an optical fiber. The receiving board 3 converts the received optical signal into an electrical signal and sends it to the main control board 1 for processing and analysis.

[0050] The two - level MSC networking architecture ensures the accurate and reliable transmission of signals in the valve - controlled equipment control system through efficient optical signal distribution and transmission, thereby achieving precise control and fault location of thyristors.

[0051] Several groups of thyristors are set, with several thyristors in each group. Several groups of thyristor control boards are set, with several thyristor control boards in each group. One thyristor control board is connected to one thyristor, and the relationship between the thyristor and the thyristor control board is one - to - one. Several optical fibers are connected between the optical distributor of a single second - level MSC networking and a single group of thyristor control boards to achieve the distribution and transmission of optical signals. Several optical fibers are connected between a single group of thyristor control boards and a single receiving board 3 to transmit control signals or data from the thyristor control boards to the receiving board 3. A single receiving board 3 is provided with several optical fiber channels, and one optical fiber channel is connected to one optical fiber to receive optical signals from different sources.

[0052] Optionally, the transmitting board 2 is provided with optical tubes. Several transmitting boards 2 are set, the number of optical tubes of a single transmitting board 2 is set to several, and the output ends of the optical distributors of a single first - level MSC networking are set to several. The output ends of the optical distributors of a single first - level MSC networking are set to several. It is used to distribute the input signals to different channels or paths to meet the connection requirements of the second - level MSC networking or thyristor control boards.

[0053] Optionally, the optical tubes of the transmitting board 2 are connected to the input ends of the optical distributors of the first - level MSC networking to ensure that the optical signals generated from the transmitting board 2 can directly and efficiently enter the first - level MSC networking for distribution. The output ends of the optical distributors of the first - level MSC networking are connected to the optical distributors of the second - level MSC networking. It allows the signals to be initially distributed in the first - level MSC networking and then transmitted to the second - level MSC networking for further distribution and transmission.

[0054] The working process of the system is as follows: The main control board 1 generates control signals, and these signals are transmitted to the transmitting board 2 through electrical connections. The optical tubes on the transmitting board 2 convert the received electrical signals into optical signals. These optical signals are then transmitted to the input end of the optical distributor in the first-level MSC network. In the first-level MSC network, the optical distributor distributes the received optical signals to different output ends. These distributed optical signals are then transmitted to the input end of the optical distributor in the second-level MSC network. In the second-level MSC network, the optical distributor distributes the signals again to ensure that each required thyristor control board can receive the corresponding optical signal. After receiving the optical signal, the thyristor control board converts it into an electrical signal to control the conduction state of the thyristor. At the same time, the thyristor control board also generates feedback signals, and these signals are transmitted back to the receiving board 3 through the optical fiber channel. The receiving board 3 converts the received optical signal into an electrical signal and transmits it back to the main control board 1 for processing and analysis.

[0055] By using optical tubes and optical distributors, the system can achieve high-speed and large-capacity signal transmission. The cascaded structure of the system allows for flexible expansion and configuration according to actual needs. Optical signal transmission has the advantages of strong anti-interference ability and long transmission distance, improving the reliability of the system.

[0056] Embodiment 2

[0057] A fiber optic connection redundancy control method from a valve control device to a thyristor includes the following steps:

[0058] When the main control board 1 determines that the thyristor has the conduction condition, for example, receives a conduction instruction or meets the preset conduction condition, the main control board 1 sends a trigger signal to the optical transmitting board 2, and the transmitting board 2 simultaneously emits the trigger signal through several optical signal output ends. After receiving the trigger signal, the transmitting board 2 will simultaneously emit it through several optical signal output ends. These optical signals are transmitted to the corresponding thyristor control boards through the optical distributor and optical fibers. After receiving the trigger signal, the thyristor control board controls the corresponding thyristor to conduct.

[0059] When the thyristor does not have the conduction condition, for example, is in the standby state or waiting for the next conduction instruction, the main control board 1 controls the several optical signal output ends of the transmitting board 2 to sequentially emit inspection signals, and these inspection signals are also transmitted to the corresponding thyristor control boards through the optical distributor and optical fibers. After receiving the inspection signal, the thyristor control board generates a feedback signal and transmits it back to the receiving board 3 through the optical fiber. After receiving the inspection signal returned by the thyristor control board, the receiving board 3 forwards it to the main control board 1.

[0060] The main control board 1 calculates whether the system is normal based on the status of the returned inspection signal and determines the fault point.

[0061] By simultaneously sending trigger signals and sequentially sending inspection signals, the system can achieve fast response to thyristors and fault detection. Fiber optic connections have the advantages of strong anti-interference ability and long transmission distance, improving the reliability of signal transmission. At the same time, redundant optical signal output terminals and inspection mechanisms ensure that the system can still operate normally when some components fail. Through the return status of the inspection signal in this embodiment method, the main control board can locate the specific fault point, providing convenience for subsequent maintenance and replacement. Using this method can achieve effective control and fault detection of thyristors, improving the overall performance and reliability of the system.

[0062] Embodiment 3

[0063] A fiber optic connection redundancy system from a valve control device to a thyristor includes a valve control device, an optical splitter, optical fibers, and a thyristor. In this embodiment, one single valve in a 12-pulse converter valve is taken as an example to illustrate the composition of the system, and the networking scheme of the valve control system of this converter valve is described with the smallest unit.

[0064] The schematic diagram of the valve control device chassis is as Figure 1 , the transmitting board 2 is responsible for sending the trigger signal generated by the main control board 1 through the optical tubes, and the 4 optical tubes of the two optical transmitting boards are all used to trigger the same single valve; the receiving board 3 is responsible for receiving the feedback signal on the thyristor side and forwarding the feedback information to the main control board 1; the main control board 1 is responsible for controlling the transmitting board 2 to emit light and calculating the thyristor feedback information received by the receiving board 3 to locate the fault position. All optical fibers are networked through two-level MSCs. In this embodiment, the first-level MSC is an optical splitter with 2 inputs and 4 outputs, and the failure of any one optical input signal does not affect the output of the optical signal; the second-level MSC in this embodiment is an optical splitter with 2 inputs and N outputs, where N is the number of optical fiber channels and is determined according to actual needs. The failure of any one optical input signal does not affect the output of the optical signal. The specific connection is as Figure 2 shown. The optical splitter (MSC), also called an optical branching device, is an optical fiber convergence device with multiple input ends and multiple output ends, and is commonly used for the coupling, branching, and distribution of optical signals. An optical fiber or optical waveguide device that realizes the coupling between one path and multiple paths or between multiple paths and multiple paths of optical signals.

[0065] The two-level MSC networking includes the first-level MSC networking and the second-level MSC networking. The electrical signal output terminal of the main control board 1 is connected to the electrical signal input terminal of the transmitting board 2, the optical signal output terminal of the transmitting board 2 is connected to the optical signal input terminal of the first-level MSC networking, the optical signal output terminal of the first-level MSC networking is connected to the optical signal input terminal of the second-level MSC networking, the optical fiber output terminal of the second-level MSC networking is connected to the optical fiber input terminal of the thyristor control board, the optical fiber output terminal of the thyristor control board is connected to the optical fiber input terminal of the receiving board 3, and the electrical signal output terminal of the receiving board 3 is connected to the electrical signal input terminal of the main control board 1. See Figure 1, the main control board 1 and the transmitting board 2 are connected through the backplane inside the chassis and are connected by electrical signals; the main control board 1 and the receiving board 3 are connected through the backplane inside the chassis and are connected by electrical signals;

[0066] In this embodiment, the transmitting board 2 includes a first transmitting board T1 and a second transmitting board T2, the optical tubes include a first optical tube U1 and a second optical tube U2, and the first-level MSC network includes a first optical distributor MSC_A and a second optical distributor MSC_B;

[0067] The first input end MSCA1 of the first optical distributor MSC_A is connected to the optical signal output end of the first optical tube U1 of the first transmitting board T1, and the second input end MSCA2 of the first optical distributor MSC_A is connected to the optical signal output end of the first optical tube U1 of the second transmitting board T2;

[0068] The four output ends of the first optical distributor MSC_A are respectively connected to the optical distributors of the second-level MSC network;

[0069] The first input end MSCB1 of the second optical distributor MSC_B is connected to the optical signal output end of the second optical tube U2 of the first transmitting board T1, and the second input end MSCB2 of the second optical distributor MSC_B is connected to the optical signal output end of the second optical tube U2 of the second transmitting board T2;

[0070] The four output ends of the second optical distributor MSC_B are respectively connected to the optical distributors of the second-level MSC network.

[0071] The second-level MSC network includes a third optical distributor MSC_1, a fourth optical distributor MSC_2, a fifth optical distributor MSC_3, and a sixth optical distributor MSC_4;

[0072] The first output end of the first optical distributor MSC_A is connected to the first input end MSC1_1 of the third optical distributor MSC_1, the second output end of the optical distributor of the first-level MSC network is connected to the first input end MSC2_1 of the fourth optical distributor MSC_2, the third output end of the optical distributor of the first-level MSC network is connected to the first input end MSC3_1 of the fifth optical distributor MSC_3, and the fourth output end of the optical distributor of the first-level MSC network is connected to the first input end MSC4_1 of the sixth optical distributor MSC_4;

[0073] The first output end of the second optical splitter MSC_B is connected to the second input end MSC1_2 of the third optical splitter MSC_1. The second output end of the optical splitter of the second optical splitter MSC_B is connected to the second input end MSC2_2 of the fourth optical splitter MSC_2. The third output end of the optical splitter of the second optical splitter MSC_B is connected to the second input end MSC3_2 of the fifth optical splitter MSC_3. The fourth output end of the optical splitter of the second optical splitter MSC_B is connected to the second input end MSC4_2 of the sixth optical splitter MSC_4;

[0074] The output end of the third optical splitter MSC_1 is fiber-connected to one end of the first group of thyristor control boards. The output end of the fourth optical splitter MSC_2 is fiber-connected to one end of the second group of thyristor control boards. The output end of the fifth optical splitter MSC_3 is fiber-connected to one end of the third group of thyristor control boards. The output end of the sixth optical splitter MSC_4 is fiber-connected to one end of the fourth group of thyristor control boards.

[0075] The receiving board 3 includes a first receiving board R1, a second receiving board R2, a third receiving board R3, and a fourth receiving board R4. The other end of the fiber of the first group of thyristor control boards is fiber-connected to the first receiving board R1. The other end of the fiber of the second group of thyristor control boards is fiber-connected to the second receiving board R2. The other end of the fiber of the third group of thyristor control boards is fiber-connected to the third receiving board R3. The other end of the fiber of the fourth group of thyristor control boards is fiber-connected to the fourth receiving board R4.

[0076] The number of channels of each receiving board 3 is several. U1 is the first optical channel of the board, U2 is the second optical channel of the board, and Un is the last optical channel of the board.

[0077] Embodiment 4

[0078] A fiber connection redundancy control method for a valve control device to a thyristor, using a fiber connection redundancy system for a valve control device to a thyristor in Embodiment 3. After comprehensive judgment, the main control board 1 sends a trigger signal to the transmitting board 2 when the thyristor meets the conduction condition. The transmitting board 2 simultaneously sends the trigger signal through 4 optical tubes. The trigger signal reaches the thyristor control board through the optical splitter and the optical fiber to turn on the thyristor. As long as 1 of the 4 optical tubes of the two transmitting boards 2 can work normally, the entire system can still achieve the triggering of the thyristor, thus greatly improving the availability of the system.

[0079] When the thyristor does not meet the conduction condition, the main control board 1 orderly controls the 4 optical tubes of the transmitting board 2 to sequentially send inspection signals (different from the trigger signal). After receiving the inspection signal returned by the thyristor control board, the receiving board 3 forwards it to the main control board 1, and the main control board 1 calculates whether the system is normal according to the state of the returned inspection signal.

[0080] The inspection algorithm is as follows:

[0081] A represents the return inspection signal status of receiving board 3 when T1U1 emits light.

[0082] B represents the return inspection signal status of receiving board 3 when T1U2 emits light.

[0083] C represents the return inspection signal status of receiving board 3 when T2U1 emits light.

[0084] D represents the return inspection signal status of receiving board 3 when T2U2 emits light.

[0085] R1, R2, R3, and R4 respectively represent 4 receiving boards 3.

[0086] 1 represents an inspection fault (the inspection return signals received by all optical receiving channels of a single receiving board are less than the required fixed value), and 0 represents normal inspection signal. The inspection signal status table is shown in Table 1;

[0087] Table 1 Inspection Status Table

[0088]

[0089] In the table, T1U1 represents the first optical tube U1 of the first transmitting board T1, T1U2 represents the second optical tube U2 of the first transmitting board T1, T2U1 represents the first optical tube U1 of the second transmitting board T2, and T2U2 represents the second optical tube U2 of the second transmitting board T2;

[0090] R1 represents the first receiving board, R2 represents the second receiving board, R3 represents the third receiving board, and R4 represents the fourth receiving board;

[0091] When all values in column A are 1, it represents an abnormality in the first input terminal MSCA1 of the first optical splitter MSC_A or the fiber optic cable of T1U1.

[0092] When all values in column B are 1, it represents an abnormality in the second input terminal MSCA2 of the first optical splitter MSC_A or the fiber optic cable of T2U1.

[0093] When all values in column C are 1, it represents an abnormality in the first input terminal MSCB1 of the second optical splitter MSC_B or the fiber optic cable of T1U2.

[0094] When all values in column D are 1, it represents an abnormality in the second input terminal MSCB2 of the second optical splitter MSC_B or the fiber optic cable of T2U2.

[0095] When all values in column A and column C are 1, it represents an abnormality in the first optical splitter MSC_A.

[0096] When all values in column B and column D are 1, it represents an abnormality in the second optical splitter MSC_B.

[0097] When both Column A and Column B are 1, it represents that the first transmitting board card T1 is abnormal.

[0098] When both Column C and Column D are 1, it represents that the second transmitting board card T2 is abnormal.

[0099] When both Column A and Column C of the R1 board card are 1 and both Column B and Column D are 0, it represents that the optical fiber of the first input end MSC1_1 of the third optical splitter MSC_1 is abnormal.

[0100] When both Column A and Column C of the R2 board card are 1 and both Column B and Column D are 0, it represents that the optical fiber of the first input end MSC2_1 of the fourth optical splitter MSC_2 is abnormal.

[0101] When both Column A and Column C of the R3 board card are 1 and both Column B and Column D are 0, it represents that the optical fiber of the first input end MSC3_1 of the fifth optical splitter MSC_3 is abnormal.

[0102] When both Column A and Column C of the R4 board card are 1 and both Column B and Column D are 0, it represents that the optical fiber of the first input end MSC4_1 of the sixth optical splitter MSC_4 is abnormal.

[0103] When both Column A and Column C of the R1 board card are 0 and both Column B and Column D are 1, it represents that the optical fiber of the second input end MSC1_2 of the third optical splitter MSC_1 is abnormal.

[0104] When both Column A and Column C of the R2 board card are 0 and both Column B and Column D are 1, it represents that the optical fiber of the second input end MSC2_2 of the fourth optical splitter MSC_2 is abnormal.

[0105] When both Column A and Column C of the R3 board card are 0 and both Column B and Column D are 1, it represents that the optical fiber of the second input end MSC3_2 of the fifth optical splitter MSC_3 is abnormal.

[0106] When both Column A and Column C of the R4 board card are 0 and both Column B and Column D are 1, it represents that the optical fiber of the second input end MSC4_2 of the sixth optical splitter MSC_4 is abnormal.

[0107] When all of Column A, Column B, Column C, and Column D of the R1 board card are 1, it represents that the third optical splitter MSC_1 is abnormal.

[0108] When all of Column A, Column B, Column C, and Column D of the R2 board card are 1, it represents that the fourth optical splitter MSC_2 is abnormal.

[0109] When all of Column A, Column B, Column C, and Column D of the R3 board card are 1, it represents that the fifth optical splitter MSC_3 is abnormal.

[0110] When all of Column A, Column B, Column C, and Column D of the R4 board card are 1, it represents that the sixth optical splitter MSC_4 is abnormal.

[0111] Upon reading the above description, many embodiments and many applications beyond the provided examples will be apparent to those skilled in the art. Accordingly, the scope of this teaching should not be determined with reference to the above description, but rather should be determined with reference to the full scope of the foregoing claims and the equivalents thereof. For the sake of completeness, all articles and references, including patent applications and published announcements, are incorporated herein by reference. Omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

[0112] The above is a further detailed description of the present invention. It cannot be determined that the specific embodiments of the present invention are limited thereto. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope determined by the claims submitted for the present invention.

Claims

1. A fiber optic connection redundancy system for a valve control device to a thyristor, characterized in that, It includes a valve control device, an optical splitter, an optical fiber, and a thyristor. The valve control device is connected to a thyristor control board through an optical fiber and an optical splitter, and the thyristor control board is connected to the thyristor. The control chassis of the valve control device includes a transmitting board, a receiving board, and a main control board. The optical fiber and the optical splitter form a two-level MSC network. The transmitting board is connected to the trigger input end of the thyristor control board through the two-level MSC network. The feedback signal of the thyristor control board is connected to the receiving board, and the transmitting board and the receiving board are respectively connected to the main control board. The transmitting board is provided with optical tubes. There are several transmitting boards, and the number of optical tubes on a single transmitting board is set to several. The optical tubes of the transmitting board are connected to the input end of the optical splitter of the first-level MSC network, and the output end of the optical splitter of the first-level MSC network is connected to the optical splitter of the second-level MSC network. The main control board is used to generate and send a thyristor trigger signal or a patrol signal to the transmitting board, obtain the feedback information of the thyristor control board received by the receiving board, and calculate and locate the fault location using the feedback information of the thyristor control board. When the thyristor does not have the conduction condition, the main control board controls several optical tubes of the transmitting board to sequentially send patrol signals. After the receiving board receives the patrol signals returned by the thyristor control board, it forwards them to the main control board. The main control board calculates whether the system is normal based on the status of the returned patrol signals and determines the fault point to locate the fault location of the optical fiber, the transmitting board, or the optical splitter. The thyristor control board is used to receive the thyristor trigger signal or the patrol signal sent by the transmitting board, control the conduction of the thyristor according to the thyristor trigger signal, and send feedback information to the receiving board. The two-level MSC network includes a first-level MSC network and a second-level MSC network. The electrical signal output end of the main control board is connected to the electrical signal input end of the transmitting board. The optical signal output end of the transmitting board is connected to the optical signal input end of the first-level MSC network. The optical signal output end of the first-level MSC network is connected to the optical signal input end of the second-level MSC network. The optical fiber output end of the second-level MSC network is connected to the optical fiber input end of the thyristor control board. The optical fiber output end of the thyristor control board is connected to the optical fiber input end of the receiving board. The electrical signal output end of the receiving board is connected to the electrical signal input end of the main control board.

2. A fiber optic connection redundancy system from a valve control device to a thyristor according to claim 1, characterized in that, There are several groups of thyristors, and each group has several thyristors. There are several groups of thyristor control boards, and each group has several thyristor control boards. One thyristor control board is connected to one thyristor. Several optical fibers are connected between a single optical splitter of the second-level MSC network and a single group of thyristor control boards. Several optical fibers are connected between a single group of thyristor control boards and a single receiving board. A single receiving board is provided with several optical fiber channels, and one optical fiber channel is connected to one optical fiber.

3. A fiber optic connection redundancy system for a valve control device to a thyristor, characterized in that, The output end of a single optical splitter of the first-level MSC network is provided with several.

4. A fiber optic connection redundancy system for a valve control device to a thyristor, characterized in that, The transmitting board includes a first transmitting board and a second transmitting board. The optical tubes include a first optical tube and a second optical tube. The first-level MSC network includes a first optical splitter and a second optical splitter. The first input end of the first optical splitter is connected to the optical signal output end of the first optical tube of the first transmitting board card, and the second input end of the first optical splitter is connected to the optical signal output end of the first optical tube of the second transmitting board card; The four output ends of the first optical splitter are respectively connected to the optical splitters of the second-level MSC network; The first input end of the second optical splitter is connected to the optical signal output end of the second optical tube of the first transmitting board card, and the second input end of the second optical splitter is connected to the optical signal output end of the second optical tube of the second transmitting board card; The four output ends of the second optical splitter are respectively connected to the optical splitters of the second-level MSC network.

5. A fiber optic connection redundancy system from a valve control device to a thyristor, characterized in that, The second-level MSC network includes a third optical splitter, a fourth optical splitter, a fifth optical splitter, and a sixth optical splitter; The first output end of the first optical splitter is connected to the first input end of the third optical splitter, the second output end of the optical splitter of the first-level MSC network is connected to the first input end of the fourth optical splitter, the third output end of the optical splitter of the first-level MSC network is connected to the first input end of the fifth optical splitter, and the fourth output end of the optical splitter of the first-level MSC network is connected to the first input end of the sixth optical splitter; The first output end of the second optical splitter is connected to the second input end of the third optical splitter, the second output end of the second optical splitter is connected to the second input end of the fourth optical splitter, the third output end of the second optical splitter is connected to the second input end of the fifth optical splitter, and the fourth output end of the second optical splitter is connected to the second input end of the sixth optical splitter; The thyristor control board card includes a first group of thyristor control board cards, a second group of thyristor control board cards, a third group of thyristor control board cards, and a fourth group of thyristor control board cards; The output end of the third optical splitter is fiber-connected to one end of the first group of thyristor control board cards, the output end of the fourth optical splitter is fiber-connected to one end of the second group of thyristor control board cards, the output end of the fifth optical splitter is fiber-connected to one end of the third group of thyristor control board cards, and the output end of the sixth optical splitter is fiber-connected to one end of the fourth group of thyristor control board cards.

6. A fiber optic connection redundancy system from a valve control device to a thyristor, characterized in that, The receiving board card includes a first receiving board card, a second receiving board card, a third receiving board card, and a fourth receiving board card. The other end of the first group of thyristor control board cards is fiber-connected to the first receiving board card, the other end of the second group of thyristor control board cards is fiber-connected to the second receiving board card, the other end of the third group of thyristor control board cards is fiber-connected to the third receiving board card, and the other end of the fourth group of thyristor control board cards is fiber-connected to the fourth receiving board card.

7. A fiber optic connection redundancy control method for a valve control device to a thyristor, characterized in that, Using a fiber connection redundancy system for a valve control device to a thyristor according to any one of claims 1-6, the method includes the following steps: When the main control board card determines that the thyristor has the conduction condition, the main control board card sends a trigger signal to the optical transmitting board card, and the transmitting board card simultaneously sends the trigger signal through several optical signal output ends. The trigger signal reaches the thyristor control board card through the optical splitter and the optical fiber to turn on the thyristor; When the thyristor does not meet the conduction condition, the main control board controls several optical tubes of the emission board to sequentially send out inspection signals. After the receiving board receives the inspection signals returned by the thyristor control board, it forwards them to the main control board. The main control board calculates whether the system is normal based on the status of the returned inspection signals and determines the fault point to locate the fault position of the optical fiber, emission board or optical splitter.

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