CN-122001465-A - Optical channel inspection system and method for complete redundancy triggering framework of converter valve

CN122001465ACN 122001465 ACN122001465 ACN 122001465ACN-122001465-A

Abstract

The invention relates to an optical channel inspection system and method of a full redundancy triggering framework of a converter valve, which are characterized in that an inspection pulse signal with specific frequency is generated through a main system according to a preset inspection sequence control strategy and a periodic cycle sequence, the inspection pulse signal is sent through an inspection optical channel, the inspection result of the optical channel in the full redundancy triggering framework of the converter valve is judged according to a return inspection pulse signal fed back by a first optical splitter through a return inspection optical channel, the monitoring of the main system, the first optical splitter and a connection optical fiber between the main system and the first optical splitter can be realized, the integrity of the whole link is ensured, the link is accurately related to a specific optical channel link, and therefore, the distributed monitoring and fault positioning of multiple optical path states are realized, and the real-time monitoring capability of the system on multiple physical optical channels is ensured.

Inventors

ZHANG JUN
LIU YANG
LIU HUIFANG
CHAI BIN
LIU HONG
DONG SIQI
BAO WEI
HU JINCHAO
WANG QIANG
Cai Linbin

Assignees

中电普瑞电力工程有限公司
国网电力科学研究院有限公司
中国地质大学（北京）
国网上海市电力公司

Dates

Publication Date: 20260508
Application Date: 20251225

Claims (11)

1. The system is characterized by comprising a double-set redundant valve control system, a first optical splitter, an inspection optical channel and a return optical channel, wherein one set of system currently running in the double-set redundant valve control system is a master system, and the other set of system is a slave system; The first optical splitter is connected with the output end of the master system and the output end of the slave system through the inspection light channel, and is also connected with the input end of the master system and the input end of the slave system through the return light channel; The main system is used for generating a patrol pulse signal with specific frequency according to a preset patrol order control strategy and a periodic circulation sequence, sending the patrol pulse signal to the first optical splitter through the patrol optical channel, and determining a patrol result of the optical channel in the complete redundancy triggering framework of the converter valve according to a return-check pulse signal returned by the first optical splitter; the first optical splitter is configured to perform optical splitting on the inspection pulse signal sent by the main system, generate the return inspection pulse signal, and send the return inspection pulse signal to the main system through the return inspection optical channel.
2. The optical channel inspection system of claim 1, wherein the host system comprises a main control board, a receiving board and a plurality of transmitting boards, wherein the inspection optical channel comprises a plurality of first optical channels; The input end of the main control board is connected with the output end of the receiving board, and the output ends of the main control board are respectively connected with the input ends of the plurality of transmitting boards; the input end of the receiving plate is connected with the first output end of the first optical splitter through the return light detection channel, and the output end of each transmitting plate is connected with the input end of the first optical splitter through one first optical channel; the main control board is used for generating a patrol timing sequence instruction corresponding to the target transmitting board according to the patrol order control strategy, and judging a patrol result of an optical channel in the complete redundancy triggering framework of the converter valve according to the recheck state data sent by the receiving board; The target transmitting board is used for generating the inspection pulse signal with specific frequency according to the inspection time sequence command and the periodic cycle sequence; The receiving plate is used for analyzing the rechecking pulse signal to obtain the rechecking state data corresponding to the rechecking pulse signal.
3. The optical channel inspection system according to claim 2, wherein the main control board is specifically configured to perform validity determination on the recheck state data to obtain valid recheck state data, and determine an inspection result of an optical channel in the fully redundant trigger architecture of the converter valve according to the valid recheck state data.
4. The optical channel inspection system according to claim 3, wherein the main control board is specifically configured to determine that an inspection result of an optical channel where the target emission board is located is an abnormal state when valid inspection status data corresponding to the optical channel where the target emission board is located is not detected in a preset inspection period, and report the abnormal state of the optical channel where the target emission board is located.
5. The optical channel inspection system according to claim 3, wherein the main control board is specifically configured to compare the data characteristic of the inspection status data with a preset data characteristic, and determine that the inspection status data is valid inspection status data when the data characteristic of the inspection status data is consistent with the preset data characteristic.
6. The optical channel inspection system according to claim 2, wherein the slave system is configured to generate an adjusted inspection timing sequence instruction corresponding to the target transmitting board according to the inspection sequence control policy when the master system fails, and inspect the state of the optical channel in the fully redundant trigger architecture of the converter valve according to the periodic cycle sequence according to the adjusted inspection timing sequence instruction.
7. The optical channel inspection system of claim 1, further comprising a trigger monitoring unit and a second beam splitter; The output end of the trigger monitoring unit is connected with the input end of the second beam splitter; the input end of the trigger monitoring unit is connected with the second output end of the first optical splitter, and the output end of the second optical splitter is respectively connected with the input end of the master system and the input end of the slave system; the trigger monitoring unit is used for controlling the converter valve according to a control signal sent by the main system and generating a return signal according to the running state of the converter valve; the second beam splitter is configured to perform beam splitting processing on the return signal to obtain a beam-split return signal, and report the beam-split return signal to the host system; the main system is also used for monitoring the converter valve according to the return signal.
8. An optical channel inspection method of a fully redundant trigger architecture of a converter valve, which is suitable for the optical channel inspection system of any one of claims 1-7, and comprises the following steps: based on a main system in the optical channel inspection system, generating an inspection pulse signal with specific frequency according to a preset inspection sequence control strategy and a periodic cycle sequence, and sending the inspection pulse signal to a first optical splitter in the optical channel inspection system through an inspection optical channel in the optical channel inspection system; Performing light splitting processing on the inspection pulse signal sent by the main system based on the first light splitter to generate a return inspection pulse signal, and sending the return inspection pulse signal to the main system through a return inspection light channel in the light channel inspection system; And based on the main system, judging the inspection result of the optical channel in the complete redundancy triggering framework of the converter valve according to the rechecking pulse signal.
9. The method of claim 8, wherein the generating the inspection pulse signal at the specific frequency based on the master system in the optical channel inspection system according to a preset inspection sequence control strategy and a periodic cyclic sequence comprises: generating a patrol timing sequence instruction corresponding to a target transmitting board in the main system based on the main control board in the main system according to the patrol order control strategy; And generating the inspection pulse signal with specific frequency according to the periodic cyclic sequence based on the target transmitting plate according to the inspection time sequence instruction.
10. The method of claim 8, wherein the determining, based on the master system, a patrol result of an optical channel in the fully redundant trigger architecture of the converter valve according to the review pulse signal comprises: Analyzing the rechecking pulse signal based on a receiving board in the main system to obtain the rechecking state data corresponding to the rechecking pulse signal; and based on the main control board in the main system, judging the inspection result of the optical channel in the complete redundancy triggering framework of the converter valve according to the inspection state data sent by the receiving board.
11. The method of claim 10, wherein the determining, based on the inspection result of the optical channel in the fully redundant trigger architecture of the converter valve by the main control board in the main system according to the inspection status data sent by the receiving board, includes: Based on a main control board in the main system, carrying out validity judgment on the recheck state data to obtain valid recheck state data; And based on the main control board, judging the inspection result of the optical channel in the full redundancy triggering framework of the converter valve according to the effective inspection state data.

Description

Optical channel inspection system and method for complete redundancy triggering framework of converter valve Technical Field The invention relates to the technical field of direct current transmission, in particular to an optical channel inspection system and method of a full redundancy trigger architecture of a converter valve. Background The reliability of the direct current transmission system is directly related to the safe and stable operation of the power grid as a core solution for the interconnection of large-capacity long-distance power transmission and a cross-regional power grid. The converter valve control system is a core control unit for direct current transmission, bears the key tasks of thyristor-level accurate triggering and state monitoring, and mainly comprises two parts of valve base electronic equipment (VBE, valve Base Electronics) and a triggering monitoring loop. The VBE is used as a core control center to integrate various functional boards, and the trigger Monitoring loop comprises a TTM board, a optical fiber network, an optical splitter and other components to form a closed loop control link. The system sends trigger pulse to the converter valve through an optical cable, simultaneously acquires state parameters of the converter valve in real time, and feeds data back to the direct current control protection system. The running state directly influences the reliability of direct-current transmission, and if a fault occurs, the direct-current system is directly caused to be stopped in an unplanned mode. The valve control system has the outstanding problem that when an optical link fails under the technical route of the existing valve control system, the specific failure position and equipment are difficult to judge. When the optical link fails, the thyristor may be triggered or not triggered by mistake, so that the thyristor breaks down, and the redundancy of the equipment is lost. In addition, VBE may also determine the status of the device by mistake, resulting in a fault being ignored, causing unnecessary loss, and more serious possible dc blocking. Disclosure of Invention In order to solve the problem that under the technical route of a valve control system in the prior art, when an optical link fails, the position and equipment of the specific failure are difficult to judge, the invention provides an optical channel inspection system of a complete redundancy triggering framework of a converter valve, which comprises a double-set redundancy valve control system, a first optical splitter, an inspection optical channel and a return optical channel, wherein one set of system currently operated in the double-set redundancy valve control system is a master system, and the other set of system is a slave system; The first optical splitter is connected with the output end of the master system and the output end of the slave system through the inspection light channel, and is also connected with the input end of the master system and the input end of the slave system through the return light channel; The main system is used for generating a patrol pulse signal with specific frequency according to a preset patrol order control strategy and a periodic circulation sequence, sending the patrol pulse signal to the first optical splitter through the patrol optical channel, and determining a patrol result of the optical channel in the complete redundancy triggering framework of the converter valve according to a return-check pulse signal returned by the first optical splitter; the first optical splitter is configured to perform optical splitting on the inspection pulse signal sent by the main system, generate the return inspection pulse signal, and send the return inspection pulse signal to the main system through the return inspection optical channel. Optionally, the main system comprises a main control board, a receiving board and a plurality of transmitting boards, wherein the inspection light channel comprises a plurality of first light channels; The input end of the main control board is connected with the output end of the receiving board, and the output ends of the main control board are respectively connected with the input ends of the plurality of transmitting boards; the input end of the receiving plate is connected with the first output end of the first optical splitter through the return light detection channel, and the output end of each transmitting plate is connected with the input end of the first optical splitter through one first optical channel; the main control board is used for generating a patrol timing sequence instruction corresponding to the target transmitting board according to the patrol order control strategy, and judging a patrol result of an optical channel in the complete redundancy triggering framework of the converter valve according to the recheck state data sent by the receiving board; The target transmitting board is used for generating the inspection pulse