Method for selecting effective system in SVF control system water cooling

Abstract

The invention discloses a method for selecting an effective system in SVF control system water cooling, and the method comprises the steps: adding an SCP1or2ACTIVE signal in a communication interface of SVF control system water cooling, and enabling the signal to select an SCP1 system to be effective or an SCP2 system to be effective; if the VCCP system receives the effective SCP1or2ACTIVE signals of both the SCP1 system and the SCP2 system, the SCP system which sends the effective SCP1or2ACTIVE signals after setting is an actual effective system; and if the VCCP receives the SCP1or2ACTIVE signal that the SCP1 system and the SCP2 system are invalid, the SCP system which firstly sends the invalid SCP1or2ACTIVE signal is set as an actual valid system. According to the method, the problems of master-slave instruction conflict and time delay caused by directly using a cross interconnection mode are solved, and the operation is simple.

Description

Technical Field

[0001] This invention relates to the field of high voltage direct current transmission technology, and more specifically to a method for selecting an effective system in water cooling of an SVF control system. Background Technology

[0002] One of the core differences between DC converter stations and conventional AC substations lies in the former's more complex auxiliary system architecture, encompassing key components such as valve cooling systems, fire protection systems, and air conditioning systems. The workload for operation, maintenance, and troubleshooting of these auxiliary systems is significantly higher than that of conventional AC substations. Their stable operation directly affects the safe operation of the DC main equipment and is a crucial supporting condition for ensuring the overall functionality of the converter station.

[0003] In the "General Interface Technical Specification for DC Transmission Converter Valve Cooling System," the SCP (Control and Protection) system signal interface of the SVF (Static Var Compensator and Filter) of each pole in the DC engineering of systems A and B adopts a cross-interconnection method with the VCCP (Valve Cooling Control and Protection) system signal interface of systems A and B. This design breaks the dependency relationship of the traditional single system, giving the control and protection signal transmission double insurance. At the same time, the dual-configuration valve cooling protection system adopts a two-out-of-three logic (i.e., at least two of the three independent signals must be consistent to trigger the action), which can further reduce the risk of false tripping. However, the cross-interconnection changes the signal transmission path from a single link to a cross link, increasing the correlation of fault points and causing a surge in the complexity of fault tracing. Furthermore, since the control and protection signals of the valve cooling system have extremely high requirements for signal delay (<10ms), the cross-interconnection may introduce additional signal synchronization deviations and transmission delays, leading to false tripping or failure to clear faults in the valve cooling system.

[0004] To address the problems associated with traditional cross-connection methods, several connection methods for valve cooling systems and DC control systems have been proposed in recent years. Chinese patent CN113993342A, entitled "A Converter Valve Cooling System and Control Method Thereof," proposes an independent parallel connection method. This method uses two identical and independent valve cooling systems to dissipate heat from a single converter valve. While this improves system reliability, it requires at least two valve cooling systems. Chinese patent application CN112911908A, entitled "A Converter Valve Circulation Cooling System and Method," designs a main circulation and bypass connection method. Its converter valve cooling system includes a main circulation loop, a deionization loop, and a water replenishment loop. The three-way valve and check valve employ a dual design, simplifying the control process while ensuring system reliability. However, this design relies on a customized valve cooling system and is unsuitable for traditional valve cooling systems. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a method for selecting an effective system in the water cooling of an SVF control system. This method directly adds an SCP_1or2ACTIVE signal to the original communication signal, optimizes the master-slave command conflict and time delay problems that occurred in the original cross-interconnection method, and improves the reliability of the valve cooling system of the high voltage DC transmission system.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] A method for selecting an effective system in water cooling of an SVF control system includes the following steps:

[0008] The S1 and SVF control systems include two SCP systems, namely SCP1 and SCP2. An SCP_1or2ACTIVE signal is added to the communication interface of the water-cooled SVF control system. This signal selects whether SCP1 or SCP2 is active. The VCCP system communicates with SCP1 and SCP2 respectively, selecting the SCP_1or2ACTIVE signal corresponding to the active SCP system.

[0009] S2. If the VCCP system receives an SCP_1or2ACTIVE signal that is valid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is valid afterward is designated as the actual valid system; if the VCCP receives an SCP_1or2ACTIVE signal that is invalid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is invalid first is designated as the actual valid system.

[0010] S3. For a valid system, VCCP sends an alarm event with a 500ms delay, does not send a lockout command, and sets the system to be available.

[0011] Furthermore, in step S1, the control cabinet of the SCP1 system includes a first A cabinet and a first B cabinet, and the control cabinet of the SCP2 system includes a second A cabinet and a second B cabinet; the SCP1 system and the SCP2 system share a set of water cooling, including internal cooling and external cooling; the control cabinet for water cooling control includes the A cabinet of the VCCP and the B cabinet of the VCCP.

[0012] Furthermore, in step S1, the connection method between the VCCP system and the SCP1 and SCP2 systems is as follows:

[0013] The VCCP A cabinet and the VCCP B cabinet are connected by synchronous optical fiber and are respectively connected to Profibus-Dp bus A and Profibus-Dp bus B. Profibus-Dp bus A includes the first 44-8 communication module A11, the first 44-8 communication module A12, the first 44-8 communication module A21, and the first 44-8 communication module A22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively. Profibus-Dp bus B includes the second 44-8 communication module B11, the second 44-8 communication module B12, the second 44-8 communication module B21, and the second 44-8 communication module B22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively.

[0014] Furthermore, the SCP system is a dual-configuration control and protection device for the SVF control system of each pole in DC engineering. By combining the harmonic compensation command of the SCP system and the reactive power / voltage command of the PCP (Pole Control and Protection) system, the converter valve control command is obtained.

[0015] Furthermore, in step S2, when the SCP system is active, the corresponding SCP_1or2ACTIVE signal output is 1; when the SCP system is inactive, the corresponding SCP_1or2ACTIVE signal output is 0.

[0016] If the VCCP system does not receive the SCP_1or2ACTIVE signal within the first preset time, or if the fluctuation range of the received SCP_1or2ACTIVE signal exceeds the normal allowable value, the VCCP system will issue an alarm event command after a 500ms delay and switch to the backup communication link to obtain a valid signal. If a valid signal still cannot be obtained within the second preset time, the water cooling equipment will be shut down and the SVF will be locked.

[0017] Furthermore, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for selecting an effective system in the water cooling of the SVF control system.

[0018] Furthermore, the present invention also proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the method for selecting an effective system in the water cooling of the SVF control system.

[0019] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0020] 1. This invention solves the master-slave instruction conflict and latency problems that occur when directly using cross-connection by designing control logic related to the SCP_1or2ACTIVE signal.

[0021] 2. This invention adds SCP_1or2ACTIVE signals to the communication interface signal without changing the original communication interface connection method or adding other equipment. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the overall implementation of the present invention.

[0023] Figure 2 This is a configuration diagram of the valve cooling control and protection system and the communication interface of the control and protection system of the present invention.

[0024] Figure 3 This is the flowchart of the SCP_1or2ACTIVE signal control logic of the present invention. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0026] To achieve the above objectives, this invention proposes a method for selecting an effective system in water cooling of an SVF control system, such as... Figure 1 As shown, the specific steps are as follows:

[0027] The S1 SVF (Static Var Compensator and Filter) control system includes two SCP (Control and Protection) systems, namely SCP1 and SCP2. An SCP_1or2ACTIVE signal is added to the communication interface of the SVF control system's water cooling, which selects whether SCP1 or SCP2 is active. The VCCP (Valve Cooling Control and Protection) system communicates with SCP1 and SCP2 respectively, selecting the SCP_1or2ACTIVE signal corresponding to the active SCP system.

[0028] Among them, the SCP system is a dual-configuration control and protection device for the SVF control system of each pole in DC engineering. By combining the harmonic compensation command of the SCP system and the reactive power / voltage command of the PCP (Pole Control and Protection) system, the converter valve control command is obtained.

[0029] The control cabinets of the SCP1 system include cabinet A and cabinet B, and the control cabinets of the SCP2 system include cabinet A and cabinet B. The SCP1 and SCP2 systems share a water cooling system, which includes internal and external cooling. The control cabinets for water cooling control include cabinet A and cabinet B of the VCCP.

[0030] like Figure 2 As shown, the connection method between the VCCP system and the SCP1 and SCP2 systems is as follows:

[0031] The VCCP A cabinet and the VCCP B cabinet are connected by synchronous optical fiber and are respectively connected to Profibus-Dp bus A and Profibus-Dp bus B. Profibus-Dp bus A includes the first 44-8 communication module A11, the first 44-8 communication module A12, the first 44-8 communication module A21, and the first 44-8 communication module A22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively. Profibus-Dp bus B includes the second 44-8 communication module B11, the second 44-8 communication module B12, the second 44-8 communication module B21, and the second 44-8 communication module B22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively.

[0032] S2, such as Figure 3As shown, if the VCCP system receives an SCP_1or2ACTIVE signal that is valid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is valid afterward is designated as the actual valid system; if the VCCP receives an SCP_1or2ACTIVE signal that is invalid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is invalid first is designated as the actual valid system.

[0033] When the SCP system is active, the corresponding SCP_1or2ACTIVE signal output is 1; when the SCP system is inactive, the corresponding SCP_1or2ACTIVE signal output is 0.

[0034] If the VCCP system does not receive the SCP_1or2ACTIVE signal within the first preset time, or if the fluctuation range of the received SCP_1or2ACTIVE signal exceeds the normal allowable value, the VCCP system will issue an alarm event command after a 500ms delay and switch to the backup communication link to obtain a valid signal. If a valid signal still cannot be obtained within the second preset time, the water cooling equipment will be shut down and the SVF will be locked.

[0035] S3. For a valid system, VCCP sends an alarm event with a 500ms delay, does not send a lockout command, and sets the system to be available.

[0036] This invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. It should be noted that when the processor executes the computer program, it corresponds to the specific steps of the method provided in this invention, possessing the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in this invention.

[0037] This invention also proposes a computer-readable storage medium storing a computer program. It should be noted that when the computer program is executed by a processor, it corresponds to the specific steps of the method provided in this invention, possessing the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in this invention.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for selecting an effective system in water cooling of an SVF control system, characterized in that, include: The S1 and SVF control systems include two SCP systems, namely SCP1 and SCP2. An SCP_1or2ACTIVE signal is added to the communication interface of the water-cooled SVF control system. This signal selects whether SCP1 or SCP2 is active. The VCCP system communicates with SCP1 and SCP2 respectively, selecting the SCP_1or2ACTIVE signal corresponding to the active SCP system. S2. If the VCCP system receives an SCP_1or2ACTIVE signal that is valid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is valid afterward is designated as the actual valid system; if the VCCP receives an SCP_1or2ACTIVE signal that is invalid for both SCP1 and SCP2, the SCP system that sends the SCP_1or2ACTIVE signal that is invalid first is designated as the actual valid system. S3. For a valid system, VCCP sends an alarm event with a 500ms delay, does not send a lockout command, and sets the system to be available.

2. The method for selecting an effective system in water cooling of an SVF control system according to claim 1, characterized in that, In step S1, the control cabinet of the SCP1 system includes cabinet A and cabinet B, and the control cabinet of the SCP2 system includes cabinet A and cabinet B. The SCP1 system and the SCP2 system share a water cooling system, including internal cooling and external cooling. The control cabinet for water cooling control includes cabinet A and cabinet B of the VCCP.

3. The method for selecting an effective system in water cooling of an SVF control system according to claim 2, characterized in that, In step S1, the connection method between the VCCP system and the SCP1 and SCP2 systems is as follows: The VCCP A cabinet and the VCCP B cabinet are connected by synchronous optical fiber and are respectively connected to Profibus-Dp bus A and Profibus-Dp bus B. Profibus-Dp bus A includes the first 44-8 communication module A11, the first 44-8 communication module A12, the first 44-8 communication module A21, and the first 44-8 communication module A22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively. Profibus-Dp bus B includes the second 44-8 communication module B11, the second 44-8 communication module B12, the second 44-8 communication module B21, and the second 44-8 communication module B22, which are connected to the first A cabinet, the first B cabinet, the second A cabinet, and the second B cabinet, respectively.

4. The method for selecting an effective system in water cooling of an SVF control system according to claim 1, characterized in that, The SCP system is a dual-configuration control and protection device for the SVF control system of each pole in a DC engineering project. It combines the harmonic compensation command of the SCP system and the reactive power / voltage command of the PCP system to obtain the converter valve control command.

5. The method for selecting an effective system in water cooling of an SVF control system according to claim 1, characterized in that, In step S2, when the SCP system is active, the corresponding SCP_1or2ACTIVE signal output is 1; 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 if the fluctuation range of the received SCP_1or2ACTIVE signal exceeds the normal allowable value, the VCCP system will issue an alarm event command after a 500ms delay and switch to the backup communication link to obtain a valid signal. If a valid signal still cannot be obtained within the second preset time, the water cooling equipment will be shut down and the SVF will be locked.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for selecting an effective system in the water cooling of the SVF control system according to any one of claims 1 to 5.

7. A computer-readable storage medium storing a computer program, characterized in that, The computer program, when run by the processor, executes the method for selecting an effective system in the SVF control system water cooling according to any one of claims 1 to 5.

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