Equipment switch remote control method and system suitable for remote area after full shutdown of power grid

Abstract

An equipment switch remote control method and system suitable for a remote area after full stop of a power grid relates to the technical field of power system automation and control, and the method comprises the following steps: S1, determining a controlled switch according to the real-time state of the equipment switch after full stop of the power grid; s2, generating a pull-open sequence of the controlled switch; s3, issuing a pull-open instruction, and pulling open the controlled switch according to the pull-open sequence; and S4, confirming a pull-off result of the controlled switch. According to the invention, through programmed remote control, unified switching-off of equipment switches of each transformer substation is realized, the time of manual operation is reduced, and the operation efficiency is greatly improved; by adopting the preset operation strategy and the optimized operation sequence, omission or sequence errors possibly caused by manual operation are avoided, it is ensured that all devices are correctly placed in the to-be-powered state, and the operation accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system automation and control, and in particular to a method and system for remotely controlling equipment switches after a complete power grid outage in a remote area. Background Art

[0002] With the development of economy and the improvement of people's living standards, higher requirements are put forward for the reliability and stability of power supply. In some remote areas, especially remote counties, due to the remote geographical location, long-chain power supply, wide distribution of equipment, poor communication conditions, low level of informatization, etc., it is easy for a single equipment failure to cause a large-scale power outage. After the power outage, if the switch is still in the closed state, it will bring serious safety hazards, causing equipment damage, power system failure and operation risks. Therefore, after the power outage, the switch should be disconnected in time to ensure the safety of personnel and equipment.

[0003] After a large-scale power outage occurs in a remote area, the following problems exist: 1) Manual operation is inefficient: After a full power outage, operation and maintenance personnel are required to go to each site and manually open the equipment switches one by one. This method is time-consuming and inefficient, especially in remote areas with inconvenient transportation, which consumes a lot of manpower and time; 2) The operation process is complicated: There are many types of equipment in each substation, including circuit breakers, disconnectors, load switches, etc. When operating manually, it is easy to cause safety hazards or equipment damage due to improper operation sequence or omission of certain equipment.

[0004] Therefore, there is an urgent need for a method and system that can programmatically open all equipment switches in each substation after a power outage and put the equipment in a unified state of waiting for power, so as to improve operational efficiency, shorten recovery time, and ensure the safety and reliability of power grid recovery. Summary of the invention

[0005] The present invention aims to provide a method and system for remote control of equipment switches after a complete power outage in remote areas, so as to solve the technical problems of low efficiency, complicated operation process and low safety of manually opening equipment switches after a large-scale power outage in remote areas.

[0006] In order to achieve the above object, the specific scheme adopted by the present invention is: a remote control method for equipment switches after a complete power outage in a remote area, comprising the following steps:

[0007] S1: Determine the controlled switch according to the real-time status of the equipment switch after the power grid is completely shut down;

[0008] S2: Generate the opening sequence of the controlled switch;

[0009] S3: Issue a pull-open command to pull open the controlled switch according to the pull-open sequence;

[0010] S4: Confirm the opening result of the controlled switch.

[0011] As a further optimization of the above technical solution: Step S1 is specifically: when the power grid is completely shut down, the real-time status information of the switches of each substation equipment is collected, and the real-time status of the equipment switches is analyzed to determine that the switch to be opened is a controlled switch.

[0012] As a further optimization of the above technical solution: Step S2 specifically comprises: determining the opening order of the controlled switches according to the grid topology and safety regulations, and generating an opening sequence.

[0013] As a further optimization of the above technical solution: the pulling order is optimized based on safety, logic and efficiency to regenerate the pulling sequence.

[0014] As a further optimization of the above technical solution: Step S3 is specifically: issuing a pull-open instruction, pulling open the controlled switch according to the pull-open sequence, monitoring the operation feedback information of each substation equipment in real time, and when abnormal operation feedback information is monitored, recording the abnormal information and notifying the operation and maintenance personnel, and executing step S4 when the monitored operation feedback information is normal.

[0015] As a further optimization of the above technical solution: the operation feedback information includes instruction reception status, operation execution status and equipment status feedback, confirming whether each substation equipment has received the instruction, whether the pull-open operation is performed, and whether the actual state of the controlled switch is the disconnected state. If each substation equipment has received the instruction, performed the pull-open operation and the actual state of the controlled switch is the disconnected state, execute step S4; if not, record the abnormal information and notify the operation and maintenance personnel.

[0016] A remote control system for equipment switches after a complete power outage in remote areas, which is suitable for use, comprises a remote control device, a communication network device, a state detection module, a pull-open sequence generation module, a control module, a feedback module and a storage medium; the state detection module is used to collect and analyze the real-time state information of the switches of each substation equipment to determine the controlled switches; the pull-open sequence generation module is used to generate a pull-open sequence of the controlled switches; the control module is used to issue a pull-open instruction based on the pull-open sequence to the remote control device; the feedback module is used to receive the operation feedback information of each substation equipment in real time and monitor the operation results.

[0017] As a further optimization of the above technical solution: the remote control device is installed on the substation equipment, which can perform the opening operation of the controlled switch and feedback the status of the controlled switch.

[0018] As a further optimization of the above technical solution: the communication network equipment includes a communication master station, a communication link and a terminal communication device.

[0019] As a further optimization of the above technical solution: the storage medium includes a policy library and a log storage unit, and the policy library is used to store the topological structure, equipment list, operating procedures and preset operating strategies of the power grid.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention realizes the unified opening of switches of each substation equipment through programmed remote control, reduces the time of manual operation, and greatly improves the operation efficiency; by adopting preset operation strategies and optimized operation sequences, it avoids omissions or sequence errors that may be caused by manual operation, ensures that all equipment is correctly placed in the power-waiting state, and improves the accuracy of operation.

[0022] The present invention reduces the need for on-site operations by maintenance personnel in a total shutdown situation, reduces personal safety risks and the possibility of equipment damage; through a reliable communication network, remote control of remote substation equipment is achieved, improving the automation and information level of the power grid.

[0023] The system of the present invention has abnormality detection and alarm functions, can timely discover and handle equipment failures, and enhances the safety and reliability of power grid operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram of the architecture of the remote control system of the present invention;

[0025] Figure 2 Schematic diagram of the remote control method of the present invention;

[0026] Figure 3 This is a schematic diagram of the switch status of substation equipment;

[0027] Figure 4 This is the schematic diagram of the remote control device;

[0028] Figure 5 This is a flowchart of exception handling in the remote control method. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. The parts of the present invention that are not described and disclosed in detail in the following embodiments should be understood as the prior art known or should be known to those skilled in the art.

[0030] The invention discloses a remote control system for equipment switches after a complete power grid shutdown in remote areas, which comprises a software module, hardware equipment and a storage medium.

[0031] The software module includes a state detection module, a pull-open sequence generation module, a control module and a feedback module. The state detection module is used to collect and analyze the real-time state information of the switches of each substation equipment to determine the controlled switches. The software module supports multiple communication protocols and has abnormality detection and alarm functions; the pull-open sequence generation module is used to generate the pull-open sequence of the controlled switches according to a preset strategy. The pull-open sequence generation module has a strategy optimization capability and can adjust the operation sequence according to actual conditions; the control module is used to issue a pull-open instruction based on the pull-open sequence to the remote control device to execute programmed operations. The control module supports batch instruction sending and has instruction verification and safety control functions; the feedback module is used to receive the operation feedback information of each substation equipment in real time and monitor the operation results. The feedback module has abnormality handling and alarm functions and can promptly prompt the operation and maintenance personnel.

[0032] The hardware equipment includes a remote control device and a communication network device. The remote control device is installed on key equipment in each substation, such as circuit breakers, disconnectors, load switches, etc. The remote control device has remote communication capabilities and supports multiple operation modes, such as manual mode and automatic mode. The remote control device can receive control instructions from the software module, perform the pull-out operation according to the control instructions, and feedback the status of the substation equipment. Figure 4 The figure shows the schematic diagram of the remote control device, which shows the internal structure and working principle of the remote control device. The communication module is used to receive instructions from the control center, the control unit is used to parse the command and execute the control, the actuator executes the opening / closing of the equipment switch, the equipment switch is a mechanical or electronic device, and the status monitoring module monitors the equipment status and can also feedback the status, that is, return the monitored status to the control center.

[0033] The communication network equipment includes the communication master station, communication links, terminal communication equipment, etc. It has high reliability and security and supports redundant backup. The communication network is set up to ensure communication between the system and each substation and supports the transmission of data and instructions.

[0034] The storage medium includes a policy library and a log storage unit. The policy library is used to store the topological structure, equipment list, operating procedures and preset operating strategies of the power grid, and supports the updating and maintenance of the strategies, and can be adjusted according to changes in the power grid; the log storage unit is used to record data, instructions, feedback information, abnormal conditions, etc. during the operation process, has large-capacity storage and fast query functions, and supports data backup.

[0035] Below, combined with the attached Figure 1 The overall architecture of the remote control system of the present invention is further described as follows: Figure 1As shown, the remote control system of the present invention includes a control center, a communication network and site equipment. The software module is the control center of the remote control system, the communication network equipment in the hardware equipment is a data transmission bridge, the communication network supports optical fiber, wireless and other transmission methods, and the remote control device in the hardware equipment serves as a site equipment.

[0036] The present invention also discloses a remote control method for equipment switches after a complete power outage in a remote area. The method adopts the above-mentioned control system and is used to open the switches of all equipment in each substation after a complete power outage in a remote area, so that the equipment is uniformly placed in a state of waiting for power.

[0037] like Figure 2 As shown, the remote control method includes the following steps:

[0038] S1: Determine the controlled switch according to the real-time status of the equipment switch after the power grid is completely shut down.

[0039] When the power grid is completely shut down, collect the real-time status information of the switches of each substation equipment, analyze the real-time status of the equipment switches, and determine that the switch to be opened is the controlled switch. Specifically:

[0040] S101: Receive full stop signal

[0041] When the monitoring system detects that a full stop event has occurred, it immediately sends a full stop signal to the power grid dispatching and control center. The full stop signal can be sent through a dedicated communication channel or a public communication network.

[0042] S102: Data collection and status analysis

[0043] The acquisition unit of the status detection module is used to collect real-time status information of each substation equipment, including: circuit breaker status (closed / open), disconnector status, load switch status, and electrical parameters such as voltage, current, and frequency; the collected real-time status information of the equipment is analyzed to determine which equipment switches are currently in a closed state and need to be opened, and the switches to be opened are used as controlled switches.

[0044] In other embodiments of the present invention, a communication network (such as a SCADA system, a remote terminal unit RTU, etc.) can also be used to collect real-time status information of each substation equipment, including: circuit breaker status (closed / open), disconnector status, load switch status, and electrical parameters such as voltage, current, and frequency; and then use the status detection module to analyze the collected real-time status information of the equipment to determine which equipment switches are currently in a closed state and need to be opened, and use the switches to be opened as controlled switches.

[0045] S2: Generate the opening sequence of the controlled switch;

[0046] S201: Calling the preset strategy

[0047] The preset strategy for the device switch opening operation is extracted from the strategy library of the storage medium. The strategy content includes the equipment list and the operation sequence. By listing the equipment list of all devices that need to be opened, the sequence of opening the controlled switches is determined according to the power grid topology and safety regulations.

[0048] S202: Optimize operation sequence

[0049] The opening sequence of controlled switches is optimized based on safety, logic and efficiency. After optimization, a detailed opening sequence of controlled switches is generated. The opening sequence includes the opening instructions and execution order of each controlled switch. Among them, safety means opening the load-side switch first to prevent the risk of reverse power transmission; logic means opening the switches from the end load to the power supply side in sequence according to the electrical connection relationship; efficiency means reducing the operation steps and time as much as possible;

[0050] S3: Programmatically switch on the device

[0051] The control module sends the switch opening instruction to the remote control device of each substation according to the opening sequence. The remote control device receives the instruction and performs the opening operation, opens the controlled switch, feedbacks the substation equipment status, and programmatically opens the equipment switch. The instruction content includes the equipment identification, operation type and execution time;

[0052] Equipment identification: clearly identify the number or name of the equipment to be operated;

[0053] Operation type: pull open (disconnect) operation;

[0054] Execution time: You can set a unified execution time or execute immediately.

[0055] In the process of programming the device to open the switch, the feedback module monitors the operation feedback information in real time, monitors the operation results, and performs abnormal detection and judgment. The operation feedback information is as follows:

[0056] Command receiving status: whether the device successfully received the command.

[0057] Operation execution status: whether the device successfully executes the pull-open operation.

[0058] Device status feedback: whether the actual status of the device has changed to disconnected.

[0059] If not, that is, an abnormal situation is found during the operation, the device does not respond or the status is inconsistent, the device fails to receive instructions or fails to perform operations, or the status of the device feedback is inconsistent with expectations, then the system will record the abnormal information, record the abnormal situation in the log, and notify the operation and maintenance personnel through alarms or SMS notifications, prompting the relevant operation and maintenance personnel to conduct on-site inspections and processing, and after the manual processing is completed, the corresponding operation feedback information is transmitted to the feedback module, and the abnormal detection and judgment are performed again.

[0060] If so, that is, each substation device receives the instruction, performs the pull-open operation, and the actual state of the controlled switch is the disconnected state, step S4 is executed.

[0061] Combine the following Figure 5 The processing flow of abnormal situations during operation is further explained. When the feedback module detects an abnormality, the log storage unit records the abnormal information and notifies the operation and maintenance personnel by SMS or alarm. The operation and maintenance personnel arrive at the substation site to inspect and repair the equipment. After the repair, the status of the abnormal equipment is updated to determine whether the abnormality has been eliminated. If not, the operation and maintenance personnel will continue to handle it on site. If so, they will return to the main process.

[0062] Figure 3 The diagram illustrates the state changes of the device switch before and after it is pulled open. During the entire process of remote control of the device switch, the device switch has four states, among which state 1 is that the switch is in a closed state (closed), and the device switch in the closed state is a controlled switch.

[0063] S4: Confirm the opening result of the controlled switch.

[0064] After all the pulling operations are completed, the system checks the status of all equipment switches to ensure that the equipment switches that need to be pulled open have been successfully disconnected.

[0065] The entire operation process is recorded in the log storage unit, and the data during the operation, including instruction issuance, execution results, feedback information, abnormal conditions, etc., are fully recorded in the log storage unit for subsequent query and analysis.

[0066] The method and system provided by the present invention for programmed opening of all equipment switches in each substation after a complete power outage in a remote area adopts automated and programmed means to achieve programmed opening of substation equipment switches, efficiently adjust the substation equipment status to a state of waiting for power, improve operational efficiency and safety, shorten the time for restoring power supply during large-scale power outages, and have broad application prospects.

[0067] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for remotely controlling equipment switches after a complete power outage in remote areas, characterized in that: The following steps are involved: S1: Determine the controlled switch according to the real-time status of the equipment switch after the power grid is completely shut down; S2: Generate the opening sequence of the controlled switch; S3: Issue a pull-open command to pull open the controlled switch according to the pull-open sequence; S4: Confirm the opening result of the controlled switch.

2. According to claim 1, a method for remotely controlling equipment switches after a complete power outage in a remote area, characterized in that: Step S1 specifically includes: when the power grid is completely shut down, real-time status information of switches of each substation equipment is collected, and the real-time status of the switches of the equipment is analyzed to determine that the switch to be opened is a controlled switch.

3. According to claim 1, a method for remotely controlling equipment switches after a complete power outage in a remote area, characterized in that: Step S2 specifically includes: determining the opening order of the controlled switches according to the grid topology and safety regulations, and generating an opening sequence.

4. The method for remotely controlling equipment switches after a complete power outage in a remote area according to claim 3 is characterized in that: The pulling order is optimized based on safety, logic and efficiency, and then the pulling sequence is generated.

5. The method for remotely controlling equipment switches after a complete power outage in a remote area according to claim 1 is characterized in that: Step S3 is specifically as follows: issue a pull-open instruction, pull open the controlled switch according to the pull-open sequence, monitor the operation feedback information of each substation equipment in real time, and when abnormal operation feedback information is monitored, record the abnormal information and notify the operation and maintenance personnel; when the monitored operation feedback information is normal, execute step S4.

6. A method for remotely controlling equipment switches after a complete power outage in a remote area according to claim 5, characterized in that: The operation feedback information includes the instruction reception status, operation execution status and equipment status feedback, confirming whether each substation equipment has received the instruction, whether the pull-open operation is performed, and whether the actual state of the controlled switch is the disconnected state. If each substation equipment has received the instruction, performed the pull-open operation and the actual state of the controlled switch is the disconnected state, execute step S4; if not, record the abnormal information and notify the operation and maintenance personnel.

7. A remote control system for equipment switches after a complete power outage in remote areas, characterized in that: It includes a remote control device, a communication network device, a state detection module, a pull-out sequence generation module, a control module, a feedback module and a storage medium; the state detection module is used to collect and analyze the real-time state information of the switches of each substation equipment to determine the controlled switch; the pull-out sequence generation module is used to generate the pull-out sequence of the controlled switch; the control module is used to send a pull-out instruction based on the pull-out sequence to the remote control device; The feedback module is used to receive the operation feedback information of each substation equipment in real time and monitor the operation results.

8. A remote control system for equipment switching after a complete power outage in a remote area according to claim 7, characterized in that: The remote control device is installed on the substation equipment, and can execute the opening operation of the controlled switch and feedback the state of the controlled switch.

9. A remote control system for equipment switching after a complete power outage in a remote area according to claim 7, characterized in that: The communication network equipment includes a communication main station, a communication link and a terminal communication equipment.

10. A remote control system for equipment switching after a complete power outage in a remote area according to claim 7, characterized in that: The storage medium includes a policy library and a log storage unit. The policy library is used to store the topological structure, equipment list, operating procedures and preset operating strategies of the power grid.

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