Converter station misoperation-preventive locking method and monitoring system

Abstract

The invention relates to a converter station misoperation-preventive locking method and a monitoring system, and belongs to the field of safe operation of power systems. According to the anti-misoperation locking method for the converter station and the monitoring system, in the switching operation process, a guardian and an operator operate separately and independently, are not influenced by the operation thinking and habits of the opposite side, and independently judge whether the current operation is correct or not, so that the monitoring efficiency and the switching operation reliability are improved; in addition, the five-prevention host is connected with the control and protection device through the protocol conversion device, anti-misoperation verification of the five-prevention host is introduced into operation logic of the monitoring system, double anti-misoperation verification is achieved, a traditional operation mode of an in-operation converter station is changed, and the workload of an operator and risks borne in the operation process are reduced.

Description

Technical Field

[0001] The invention relates to a converter station anti-mislocking method and a monitoring system, belonging to the field of power system safety operation. Background Art

[0002] In the earliest DC converter stations commissioned in China, the monitoring system's operational authority is limited to the operation permission signal generated by the control and protection system logic. During a switching operation, the power grid typically provides an operation ticket, which the operator prints out. The operator then initiates the operation according to the ticket, and the supervisor is responsible for reading the ticket and monitoring the operator's operation. The correctness of the switching operation depends primarily on the supervisor's confirmation. Only after the supervisor's confirmation is the operator's operation further transmitted to the DC control and protection system. This traditional switching operation process undoubtedly has the disadvantages of high workload, cumbersome procedures, and low efficiency. Furthermore, the operator and supervisor are in the same space. On the one hand, the supervisor imposes greater operational pressure and psychological burden on the operator, making the operator's operation prone to problems. On the other hand, the supervisor's judgment may be influenced by the operator, resulting in the supervisor being unable to correctly identify the correctness of the operator's work. This is increasingly unable to meet the needs of modern power operation and maintenance. Summary of the Invention

[0003] The purpose of the present invention is to provide a converter station anti-mislocking method and monitoring system to solve the problem that during the switching process of a DC converter station, the operator is under great operating pressure and psychological burden due to the fact that the operator and the supervisor are in the same space, and the operator's operation is prone to problems; and the judgment of the supervisor may be affected by the operator, resulting in the supervisor being unable to correctly identify the correctness of the operator's work.

[0004] To achieve the above object, the solution of the present invention includes: The converter station anti-mislocking method of the present invention comprises the following steps: After the remote control operation of unlocking the device, if a pre-operation instruction generated according to the operation ticket is received from the operator at the operator station, the pre-operation instruction will be sent to the supervisor station independent of the operator station for confirmation by the supervisor. If the supervisor's confirmation operation is received and the device corresponding to the pre-operation instruction passes the verification, the pre-operation instruction will be issued.

[0005] Furthermore, the operation ticket is generated by the five-defense host based on the device status information.

[0006] Furthermore, the condition for remote control operation of unlocking the device is to receive an operation ticket for successful rehearsal issued by the five-defense host.

[0007] Furthermore, passing the equipment verification means that the operation ticket issued by the five-prevention host indicates that the five-prevention operation of the equipment is allowed.

[0008] The monitoring system of the present invention includes a station server, the station server includes a processor, the monitoring system also includes an operator station and a monitor station independent of the operator station, and the processor is used to execute a computer program to implement the following steps: After the monitoring system unlocks the remote control operation of the device, if the operator receives a pre-operation instruction generated according to the operation ticket at the operator station, the pre-operation instruction will be sent to the supervisor station for confirmation by the supervisor. If the supervisor's confirmation operation is received and the equipment corresponding to the pre-operation instruction passes the verification, the pre-operation instruction will be issued.

[0009] Furthermore, the operation ticket is generated by the five-defense host based on the device status information.

[0010] Furthermore, the monitoring system is used to communicate with the five-defense host, and the condition for the monitoring system to unlock the remote control operation of the device is to receive an operation ticket for successful rehearsal issued by the five-defense host.

[0011] Furthermore, passing the equipment verification means that the operation ticket issued by the five-prevention host indicates that the five-prevention operation of the equipment is allowed.

[0012] Furthermore, the monitoring system is used to communicate with the five-defense host through a protocol conversion device.

[0013] The beneficial effects of the present invention are: The converter station anti-error locking method and monitoring system of the present invention enable the guardian and the operator to operate separately and independently, without being affected by each other's operating ideas and habits, and independently judge whether the current operation is correct, so that the operator can perform the switching operation without being affected by the guardian, thereby reducing the probability of operational errors, and the guardian is not affected by the operator's switching operation, and can correctly judge whether the switching operation is correct, thereby improving the monitoring efficiency and the reliability of the switching operation, changing the traditional operating mode of the converter station in operation, and reducing the operator's workload and the risks borne during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the traditional converter station switching operation; Figure 2 Schematic diagram of a switching operation targeted by the converter station anti-mislocking method of the present invention; Figure 3 It is a flow chart of the converter station anti-mislocking method of the present invention. DETAILED DESCRIPTION

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below in detail with reference to the accompanying drawings.

[0016] The idea of the present invention is that during the switching process of the converter station, the supervisor and the operator jointly confirm the switching operation through the network instead of confirming the switching operation through language or body movements in a close space, so that the supervisor and the operator can make judgments relatively independently and avoid mutual influence.

[0017] An implementation method for preventing mislocking of a converter station: like Figure 1 As shown in the figure, the traditional switching operation process of the converter station involves the operator station, guardian, station server, communication screen switch, control and protection system, measurement and control device and on-site primary equipment.

[0018] like Figure 2 As shown, the present invention's method for preventing misoperational locking of converter stations targets equipment involved in the switching process, including a monitoring system, a five-protection host computer, a protocol converter, a communication screen switch, a control and maintenance system, a measurement and control device, and on-site primary equipment. The monitoring system also includes an operator station, a supervisor station, and a station server. The station server is responsible for receiving and processing instructions, sending instructions, and receiving signals from the operator and supervisor stations. The monitoring system is connected to the five-protection host computer and the control and maintenance system via the protocol converter, monitoring the equipment and instructions involved in the switching process.

[0019] Compared to traditional converter station switching operations, the present invention's method for preventing misoperational locking in converter stations adds a supervisor station, a five-protection host, and a protocol conversion device to the switching process. The five-protection host is directly connected to the control and protection system via the protocol conversion device. The five-protection host performs five-protection misoperation verification on switching operations and monitors system connectivity.

[0020] In addition, during the switching operation, the guardian is no longer responsible for counting the votes and supervising the operator's operation. Instead, a joint confirmation function is added. The operator and the guardian are not in the same space. The operator is at the operator station and the guardian is at the supervisor station. Both parties jointly confirm the switching operation through communication equipment to avoid mutual influence between the operator and the supervisor.

[0021] like Figure 3 As shown, the converter station anti-mislocking method of the present invention includes the following steps: 1) Upon receiving a dispatch order for switching, the switching preparation process begins. The monitoring system connects to the five-prevention control host via a protocol converter. The monitoring system transmits real-time status information of switching-related equipment to the five-prevention control host via the protocol converter, which then performs logical analysis based on the primary equipment status. When the operator operates, the five-prevention control host issues a five-prevention operation ticket and conducts a rehearsal. Only after a successful rehearsal does the monitoring system unlock remote control of the switching-related equipment; otherwise, the switching-related equipment remains locked.

[0022] 2) After the monitoring system unlocks the operation of the corresponding equipment, the operator receives the pre-operation instruction for switching. The operator initiates the operation through the operator station in the monitoring system, and then the "pre-operation instruction" is sent to the guardian at the supervisor station in the monitoring system for the guardian to confirm the operation, so that the guardian can monitor the operator's switching operation at the supervisor station, and then after confirmation, it is sent to the DC control and protection system by the station server.

[0023] During pre-operation, the operator issues a command requesting switching at the operator station. Upon receiving the command from the operator station, the station server in the monitoring system verifies again whether the command complies with the five-prevention verification, meaning that the five-prevention operation of the equipment in the five-prevention operation ticket is permitted. After passing the verification, the station server in the monitoring system issues a pre-operation command for switching to the supervisor station. This command will not be exported, but an operation confirmation dialog box will automatically pop up at the supervisor station. After the supervisor selects the command and confirms it, the operator station will automatically pop up a command issuance window. After the operator selects the command issuance, the relevant operation command will be issued to the DC control and protection system through the station server. The DC control and protection system will then control the switching-related equipment to perform the switching operation and continue switching until the switching is complete.

[0024] An implementation method of a monitoring system: The monitoring system includes a station server, which includes a processor. The monitoring system also includes an operator station and a monitor station independent of the operator station. The processor is used to execute a computer program to implement the steps of a converter station anti-mistaken locking method in an implementation method of a converter station anti-mistaken locking method. The converter station anti-mistaken locking method has been introduced in detail in an implementation method of a converter station anti-mistaken locking method and will not be repeated here.

[0025] The converter station anti-mistaken locking method and monitoring system of the present invention do not require modification of existing operating equipment or changes to the main interface of the monitoring system. By introducing anti-mistaken locking verification during switching operations, they improve operational efficiency, reduce operational risks, and alleviate the burden on operators. This allows supervisors and operators to operate separately, unaffected by each other's operating ideas and habits, and independently determine whether the current operation is correct. This improves supervisory efficiency and the reliability of switching operations, changes the traditional operating mode of operating converter stations, and reduces operator workload and risks during operation.

Claims

1. A method for preventing mislocking of a converter station, characterized in that: The steps include: After the remote control operation of unlocking the device, if a pre-operation instruction generated according to the operation ticket is received from the operator at the operator station, the pre-operation instruction will be sent to the supervisor station independent of the operator station for confirmation by the supervisor. If the supervisor's confirmation operation is received and the device corresponding to the pre-operation instruction passes the verification, the pre-operation instruction will be issued.

2. The converter station anti-mislocking method according to claim 1, characterized in that: The operation ticket is generated by the five-defense host according to the device status information.

3. The converter station anti-mislocking method according to claim 1, characterized in that: The condition for remote control operation of unlocking the device is to receive a successful rehearsal operation ticket issued by the five-defense host.

4. The converter station anti-mislocking method according to claim 3, characterized in that: Equipment verification passed means that the operation ticket issued by the five-prevention host indicates that the five-prevention operation of the equipment is allowed.

5. A monitoring system, comprising a station server, wherein the station server comprises a processor, characterized in that: The monitoring system further includes an operator station and a monitor station independent of the operator station, and the processor is configured to execute a computer program to implement the following method steps: After the remote control operation of unlocking the device, if the operator receives a pre-operation instruction generated according to the operation ticket at the operator station, the pre-operation instruction will be sent to the supervisor station for confirmation by the supervisor. If the supervisor's confirmation operation is received and the device corresponding to the pre-operation instruction passes the verification, the pre-operation instruction will be issued.

6. The monitoring system according to claim 5, characterized in that: The operation ticket is generated by the five-defense host based on the device status information.

7. The monitoring system according to claim 5, characterized in that: The monitoring system is used to communicate with the five-defense host. The condition for the monitoring system to unlock the remote control operation of the device is to receive an operation ticket for successful rehearsal issued by the five-defense host.

8. The monitoring system according to claim 7, characterized in that: Equipment verification passed means that the operation ticket issued by the five-prevention host indicates that the five-prevention operation of the equipment is allowed.

9. The monitoring system according to claim 6 or 7, characterized in that: The monitoring system is used to communicate with the five-defense host through a protocol conversion device.

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