CN-121978994-A - Method for selecting effective system in SVF control system water cooling

Abstract

The invention discloses a method for selecting an effective system in water cooling of an SVF control system, which comprises the steps of adding an SCP_1or2ACTIVE signal in a water cooling communication interface of the SVF control system, wherein the SCP_1or2ACTIVE signal is selected to be effective or the SCP2 system is effective, setting an SCP system which transmits the effective SCP_1or2ACTIVE signal after the VCCP system receives the effective SCP_1or2ACTIVE signal of the SCP1 system and the SCP2 system as an actual effective system if the VCCP system receives the effective SCP_1or2ACTIVE signal of the SCP1 system and the SCP2 system, and setting the SCP system which transmits the ineffective SCP_1or2ACTIVE signal as the actual effective system if the VCCP system receives the ineffective SCP_1or2ACTIVE signal of the SCP1 system and the SCP2 system. The invention solves the problems of master-slave instruction conflict and time delay which occur in a direct use cross interconnection mode, and has simple operation.

Inventors

• MAO XINTONG
• DU SHANGAN
• LIU WEI
• Mo hao
• LIU ZHIHAN
• ZHU ZHENHUA
• ZHANG XIANMENG
• WU WEI
• FENG XUAN
• MA TIAN
• SHEN XIAOLIN
• LU DONGBIN
• REN MENGGAN
• LIANG CHENGUANG

Assignees

• 国网江苏省电力有限公司建设分公司
• 国网江苏省电力有限公司
• 国网经济技术研究院有限公司
• 南京南瑞继保电气有限公司
• 中电普瑞电力工程有限公司

Dates

Publication Date

20260505

Application Date

20251217

Claims (7)

1. 1. A method for selecting an active system in water cooling of an SVF control system, comprising: The SVF control system comprises two SCP systems, namely an SCP1 system and an SCP2 system, wherein an SCP_1or2ACTIVE signal is added in a water-cooled communication interface of the SVF control system, and the SCP1 system is selected to be effective or the SCP2 system is selected to be effective; S2, if the VCCP system receives the SCP_1or2ACTIVE signals which are valid in the SCP1 system and the SCP2 system, setting the SCP system which is valid in the SCP_1or2ACTIVE signals which are sent later as an actual valid system; s3, aiming at an actual effective system, the VCCP sends an alarm event with a delay of 500ms, does not send a locking instruction and sets the system as an available instruction.
2. 2. The method for selecting an effective system in water cooling of an SVF control system according to claim 1, wherein in step S1, the control cabinet of the SCP1 system includes a first No. a cabinet and a first No. B cabinet, the control cabinet of the SCP2 system includes a second No. a cabinet and a second No. B cabinet, the SCP1 system and the SCP2 system share a set of water cooling including internal cooling and external cooling, and the control cabinet of the water cooling control includes a No. a cabinet of the VCCP and a No. B cabinet of the VCCP.
3. 3. The method for selecting an effective system in water cooling of an SVF control system according to claim 2, wherein in step S1, the VCCP system is connected to the SCP1 system and the SCP2 system in the following manner: The A-type cabinet of the VCCP and the B-type cabinet of the VCCP are connected through synchronous optical fibers and are respectively connected to a Profibus-Dp bus A and a Profibus-Dp bus B, the Profibus-Dp bus A comprises a first 44-8 communication module A11, a first 44-8 communication module A12, a first 44-8 communication module A21 and a first 44-8 communication module A22, the first A-type cabinet, the first B-type cabinet, the second A-type cabinet and the second B-type cabinet are respectively connected, the Profibus-Dp bus B comprises a second 44-8 communication module B11, a second 44-8 communication module B12, a second 44-8 communication module B21 and a second 44-8 communication module B22, and the Profibus-Dp bus B is respectively connected with the first A-type cabinet, the first B-type cabinet, the second A-type cabinet and the second B-type cabinet.
4. 4. The method for selecting an effective system in water cooling of an SVF control system according to claim 1, wherein the SCP system is a control and protection device for dual configuration of the SVF control system for each pole of the dc engineering, and the converter valve control command is obtained by combining a harmonic compensation command of the SCP system and a reactive/voltage command of the PCP system.
5. 5. The method of claim 1, wherein in step S2, when the SCP system is ACTIVE, the corresponding SCP_1or2ACTIVE signal output is 1, and when the SCP system is inactive, the corresponding SCP_1or2ACTIVE signal output is 0; If the VCCP system does not receive the SCP_1or2ACTIVE signal within the first preset time or the fluctuation range of the received SCP_1or2ACTIVE signal exceeds the normal allowable value, the VCCP system sends out an instruction for delaying 500ms to send an alarm event, and meanwhile, the VCCP system is switched to a standby communication link to acquire an effective signal, if the effective signal still cannot be acquired within the second preset time, water cooling equipment is cut off, and SVF is blocked.
6. 6. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, performs the steps of the method of selecting an active system in water cooling of the SVF control system of any one of claims 1 to 5.
7. 7. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor performs the method of selecting an active system in water cooling of an SVF control system of any one of claims 1 to 5.

Description

Method for selecting effective system in SVF control system water cooling Technical Field The invention relates to the technical field of high-voltage direct-current transmission, in particular to a method for selecting an effective system in water cooling of an SVF control system. Background One of the core differences between a direct current converter station and a conventional alternating current transformer station is characterized in that the direct current converter station is provided with a more complex auxiliary system, and the auxiliary system comprises key components such as a valve cooling system, a fire protection system, an air conditioning system and the like. The operation and maintenance and defect processing task quantity of the auxiliary system is obviously higher than that of a conventional alternating-current transformer substation, the stable operation state of the auxiliary system is directly related to the safe operation of direct-current main equipment, and the auxiliary system is an important supporting condition for guaranteeing the realization of the integral function of the converter station. In general interface technical Specification of valve cold System of DC transmission converter valve, SCP (Control and Protection, control protection) system signal interface of SVF (STATIC VAR Compenser AND FILTER, static reactive compensation and filter) of each pole of DC engineering of A, B system and VCCP (Valve Cooling Control and Protection, valve cold control protection) system signal interface of A, B system adopt the way of cross interconnection, this kind of design breaks the dependency of the traditional single system, make the control protection signal transmission possess double insurance, meanwhile, the valve cold protection system of the double configuration adopts three to get two logic (namely at least two in three independent signals are identical to trigger the action), can further reduce the risk of misoperation. However, the cross interconnection changes the signal transmission path from a single link to a cross link, the relevance of fault points is enhanced, the complexity of tracing faults is greatly increased, and because the control protection signal of the valve cooling system has extremely high requirements (10 ms) on signal delay, the cross interconnection may introduce additional signal synchronization deviation and transmission delay, and the situation that the valve cooling system is malfunction or faults are not timely cut off occurs. In order to solve the problems of the traditional cross-connection mode, a connection mode of a valve cooling system and a direct current control system is proposed in recent years. Chinese patent publication No. CN113993342a, entitled a converter valve cooling system and control method thereof sets an independent parallel connection mode, and radiates heat from one converter valve through two completely identical and independent valve cooling systems, and although the system reliability is improved, more than two sets of valve cooling needs to be configured in the system. The Chinese patent application with the publication number of CN112911908A and the invention name of a converter valve circulation cooling system and a method designs a main circulation and bypass connection mode, the converter valve cooling system comprises a main circulation loop, a deionized loop and a water supplementing loop, a three-way valve and a check valve are in a double design, the control flow is simplified, the system reliability is ensured, but the design depends on a customized valve cooling system, and the system is not suitable for the traditional valve cooling system. Disclosure of Invention The invention aims to solve the technical problems of providing a method for selecting an effective system in water cooling of an SVF control system, which directly adds an SCP_1or2ACTIVE signal to an original communication signal, optimizes the problems of master-slave command conflict and time delay in an original cross interconnection mode, and improves the operation reliability of a valve cooling system of a high-voltage direct-current transmission system. In order to solve the technical problems, the invention adopts the following technical scheme: A method for selecting an active system in water cooling of an SVF control system, comprising the steps of: The SVF control system comprises two SCP systems, namely an SCP1 system and an SCP2 system, wherein an SCP_1or2ACTIVE signal is added in a water-cooled communication interface of the SVF control system, the SCP1 system is selected to be effective or the SCP2 system is selected to be effective, the VCCP system is respectively communicated with the SCP1 system and the SCP2 system, and the SCP_1or2ACTIVE signal corresponding to the effective SCP system is selected. S2, setting the SCP system which transmits the SCP_1or2ACTIVE signal to be effective as the actual effective system after setting when t