A power grid stability control offline strategy multi-level synchronous updating method and device and medium

Abstract

The application discloses a power grid stability control offline strategy multilevel synchronous updating method and device and medium, the method comprises the following steps: constructing a multilevel updating architecture of the stability control offline strategy based on a safety and stability control system; and performing synchronous updating of the stability control offline strategy based on the multilevel updating architecture; the application guarantees the synchronous updating of the strategy between all sites of the stability control offline strategy, and guarantees the safe and stable operation of the power grid.

Description

Technical Field

[0001] This invention relates to a multi-level synchronous update method, device, and medium for offline power grid stability control strategies, belonging to the field of power system technology. Background Technology

[0002] The current stability control system formulates offline control strategy tables based on conservative principles, and performs safe and stable control during severe faults to ensure the safe and stable operation of the power grid under severe fault conditions. When the stability control system's network structure changes, the stability control system strategy changes; this change inevitably leads to changes in the master station's strategy, which in turn leads to changes in the strategies of the substations and execution stations. Therefore, when the stability control system's network structure changes, the strategies of the master station, substations, and execution stations all need to be updated. Considering the strategy updates between various stations using the offline stability control strategy, if they are not updated synchronously, it may lead to the risk of mismatch in strategy control quantity calculations and control measures, resulting in safety and stability issues in the power grid. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, device and medium for multi-level synchronous update of offline power grid stability control strategy, which can ensure the synchronous update of the strategy among various sites of the offline stability control strategy and ensure the safe and stable operation of the power grid.

[0004] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0005] In a first aspect, the present invention provides a multi-level synchronous update method for offline power grid stability control strategies, comprising:

[0006] A multi-level update architecture for offline stability control strategies is constructed based on a safe and stable control system.

[0007] Synchronous updates of offline stability control strategies are performed based on a multi-level update architecture.

[0008] Optionally, the multi-level update architecture for constructing the offline stability control strategy includes:

[0009] A three-layer stability control structure is constructed, comprising a master station, substations, and execution stations from top to bottom; the master station and substations, and the substations and execution stations, are connected via a network.

[0010] A dispatch center station is constructed, and the master station, substations and execution stations are connected to the dispatch center station through a switch.

[0011] Optionally, the master station, sub-stations, execution stations, and dispatch center station are equipped with GPS timing modules.

[0012] Optionally, the synchronous update of the offline stability control strategy based on a multi-level update architecture includes:

[0013] In response to the GPS_REQ request message sent by the dispatch center station, the master station, substations and execution stations reply with GPS_RESP request messages;

[0014] In response to the GPS_RESP request messages from the master station, substations, and execution stations, the dispatch center station determines whether a GPS timing flag exists in the GPS_RESP request message. If a GPS timing flag exists, it sends the offline stability control strategy update content; if no GPS timing flag exists, it performs time synchronization and sends the offline stability control strategy update content after the time synchronization is completed.

[0015] In response to the stability control offline policy update sent by the dispatch center station, the master station, sub-station, and execution station store the stability control offline policy update locally to complete the synchronous update of the stability control offline policy.

[0016] Optionally, the time synchronization includes:

[0017] In response to the start message sent by the dispatch center at time T1, the master station, the sub-station and the execution station determine the time when they received the start message, which is denoted as time T2.

[0018] In response to the message with time T1 sent by the dispatch center station, the master station, sub-station and execution station reply with T1_resp message at time T3;

[0019] In response to the T1_resp message replied by the master station, sub-station and execution station at time T3, the dispatch center station determines the time when it received the T1_resp message, which is recorded as time T4.

[0020] In response to the message with time T4 sent by the dispatch center station, the master station, sub-station and execution station confirm that they have received the message with time T4;

[0021] Calculate the time difference ΔT between the dispatch center station and the main station, substations, and execution stations based on times T1, T2, T3, and T4:

[0022]

[0023] If the time difference ΔT > 1s, then the local time is calibrated based on the time difference ΔT. The calibrated local time is:

[0024] T0 ′ =T0+ΔT

[0025] In the formula, T0, T0 ′ This is the local time and the verified local time.

[0026] Optionally, the content of sending the offline stability control strategy update includes:

[0027] The offline stability control strategy update content is decomposed into a preset number of N sub-contents, and numbered according to the order of decomposition.

[0028] Send the sub-content corresponding to number n=1. In response to receiving the message that the sub-content has been received from the master station, sub-station and execution station, set n=n+1 and repeat the current step until n is greater than N.

[0029] Optionally, the synchronous update of the offline stability control strategy based on the multi-level update architecture further includes:

[0030] When sending the offline stability control strategy update content, the dispatch center station sends a message with a first check code CRC. The first check code CRC is generated by the sent offline stability control strategy update content according to the standard CRC16 algorithm.

[0031] Before storing the offline stability control policy update content locally, the master station, sub-station, and execution station calculate the received offline stability control policy update content according to the standard CRC16 algorithm to generate a second check code CRC; determine whether the first check code CRC and the second check code CRC are consistent. If they are consistent, reply with a message indicating that the verification has passed; if they are inconsistent, reply with a message requesting retransmission.

[0032] Secondly, the present invention provides a multi-level synchronous update device for offline power grid stability control strategies, the device comprising:

[0033] The architecture building module is used to build a multi-level update architecture for offline stability control strategies based on a secure and stable control system.

[0034] The synchronous update module is used for synchronous updates of offline stability control strategies based on a multi-level update architecture.

[0035] Thirdly, the present invention provides a multi-level synchronous update device for offline power grid stability control strategies, including a processor and a storage medium;

[0036] The storage medium is used to store instructions;

[0037] The processor is used to perform the steps of the above method according to the instructions.

[0038] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0039] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0040] This invention provides a multi-level synchronous update method, device, and medium for offline power grid stability control strategies. By constructing a multi-level update architecture and performing synchronous updates of offline stability control strategies based on this architecture, it can ensure the synchronous updates of strategies among various stations, thereby guaranteeing the safe and stable operation of the power grid. Attached Figure Description

[0041] Figure 1 This is a flowchart of a multi-level synchronous update method for offline power grid stability control strategy provided in Embodiment 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of the multi-level update architecture in the absence of GPS provided in Embodiment 1 of the present invention;

[0043] Figure 3 This is a schematic diagram of a multi-level update architecture with GPS provided in Embodiment 1 of the present invention;

[0044] Figure 4 This is a flowchart of the synchronous update of the offline stability control strategy based on a multi-level update architecture, provided in Embodiment 1 of the present invention.

[0045] Figure 5 This is a flowchart of time synchronization during the synchronous update process provided in Embodiment 1 of the present invention. Detailed Implementation

[0046] 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.

[0047] Example 1:

[0048] like Figure 1 As shown, this embodiment of the invention provides a multi-level synchronous update method for offline power grid stability control strategies, including the following steps:

[0049] 1. Construct a multi-level update architecture for offline stability control strategies based on a secure and stable control system;

[0050] 2. Synchronous update of offline stability control strategies based on a multi-level update architecture.

[0051] like Figure 2 As shown, the multi-level update architecture for constructing the offline stability control strategy includes:

[0052] A three-tiered stability control structure is constructed, consisting of a master station, substations, and execution stations from top to bottom. The master station and substations, as well as the substations and execution stations, are connected via a network. The network connection typically uses a dedicated 2M stability control network.

[0053] A dispatch center station is constructed, and the master station, substations and execution stations are connected to the dispatch center station through a switch (dispatch data network).

[0054] like Figure 3 As shown, based on the multi-level update architecture, the main station, sub-stations, execution stations, and dispatch center station are equipped with GPS timing modules.

[0055] When the system has GPS, the GPS timing module is used as the timing source, and the time scale of the entire system is on the millisecond level. The clock hands of the entire system depend on their respective independent GPS timing modules.

[0056] In the absence of GPS, the system uses the clock hand of the dispatch center station as the time source and transmits time to the master station / sub / execution station through the dispatch data network. Due to the network characteristics of the dispatch data network, the system synchronization time scale is on the order of seconds.

[0057] like Figure 4 As shown, the synchronous update of the offline stability control strategy based on a multi-level update architecture includes:

[0058] 1. In response to the GPS_REQ request message sent by the dispatch center station, the master station, substations and execution stations reply with GPS_RESP request messages;

[0059] 2. In response to the GPS_RESP request messages from the master station, substation, and execution station, the dispatch center station determines whether there is a GPS timing flag in the GPS_RESP request message. If there is a GPS timing flag, it sends the offline stability control strategy update content; if there is no GPS timing flag, it performs time synchronization. After completing time synchronization, it sends the offline stability control strategy update content.

[0060] The offline stability control strategy update includes the following:

[0061] The offline stability control strategy update content is decomposed into a preset number of N sub-contents, and numbered according to the order of decomposition.

[0062] Send the sub-content corresponding to number n=1. In response to receiving the message that the sub-content has been received from the master station, sub-station and execution station, set n=n+1 and repeat the current step until n is greater than N.

[0063] 3. In response to the stability control offline policy update sent by the dispatch center station, the main station, sub-station and execution station store the stability control offline policy update locally to complete the synchronous update of the stability control offline policy.

[0064] like Figure 5 As shown, time synchronization includes:

[0065] 1. In response to the start message sent by the dispatch center station at time T1, the master station, substation and execution station determine the time when the start message is received, which is denoted as time T2;

[0066] 2. In response to the message with time T1 sent by the dispatch center station, the master station, substation, and execution station reply with a T1_resp message at time T3;

[0067] 3. In response to the T1_resp message replied by the master station, substation and execution station at time T3, the dispatch center station determines the time when it received the T1_resp message, and records it as time T4;

[0068] 4. In response to the message with time T4 sent by the dispatch center station, the master station, sub-station and execution station confirm that they have received the message with time T4;

[0069] 5. Calculate the time difference ΔT between the dispatch center station and the main station, substations, and execution stations based on times T1, T2, T3, and T4:

[0070]

[0071] 6. If the time difference ΔT > 1s, then calibrate the local time based on the time difference ΔT. The calibrated local time is:

[0072] T0 ′ =T0+ΔT

[0073] In the formula, T0, T0 ′ This is the local time and the verified local time.

[0074] In addition, the synchronous update of the offline stability control strategy based on the multi-level update architecture also includes:

[0075] When sending the offline stability control strategy update content, the dispatch center station sends a message with a first checksum CRC. The first checksum CRC is generated by calculating the offline stability control strategy update content according to the standard CRC16 algorithm.

[0076] Before storing the offline stability control policy update content locally, the master station, sub-station, and execution station calculate the received offline stability control policy update content according to the standard CRC16 algorithm to generate a second check code CRC; determine whether the first check code CRC and the second check code CRC are consistent. If they are consistent, reply with a message indicating that the verification has passed; if they are inconsistent, reply with a message requesting retransmission.

[0077] Example 2:

[0078] This invention provides a multi-level synchronous update device for offline power grid stability control strategies, the device comprising:

[0079] The architecture building module is used to build a multi-level update architecture for offline stability control strategies based on a secure and stable control system.

[0080] The synchronous update module is used for synchronous updates of offline stability control strategies based on a multi-level update architecture.

[0081] The architecture building module constructs a multi-level update architecture for the offline stability control strategy, including:

[0082] A three-tiered stability control structure is constructed, consisting of a master station, substations, and execution stations from top to bottom. The master station and substations, as well as the substations and execution stations, are connected via a network. The network connection typically uses a dedicated 2M stability control network.

[0083] A dispatch center station is constructed, and the master station, substations and execution stations are connected to the dispatch center station through a switch (dispatch data network).

[0084] Based on the multi-level update architecture, GPS timing modules are equipped on the main station, sub-stations, execution stations, and dispatch center station.

[0085] The synchronous update of the offline stability control strategy in the synchronous update module includes:

[0086] 1. In response to the GPS_REQ request message sent by the dispatch center station, the master station, substations and execution stations reply with GPS_RESP request messages;

[0087] 2. In response to the GPS_RESP request messages from the master station, substation, and execution station, the dispatch center station determines whether there is a GPS timing flag in the GPS_RESP request message. If there is a GPS timing flag, it sends the offline stability control strategy update content; if there is no GPS timing flag, it performs time synchronization. After completing time synchronization, it sends the offline stability control strategy update content.

[0088] 3. In response to the stability control offline policy update sent by the dispatch center station, the main station, sub-station and execution station store the stability control offline policy update locally to complete the synchronous update of the stability control offline policy.

[0089] (1) Time synchronization includes:

[0090] 1. In response to the start message sent by the dispatch center station at time T1, the master station, substation and execution station determine the time when the start message is received, which is denoted as time T2;

[0091] 2. In response to the message with time T1 sent by the dispatch center station, the master station, substation, and execution station reply with a T1_resp message at time T3;

[0092] 3. In response to the T1_resp message replied by the master station, substation and execution station at time T3, the dispatch center station determines the time when it received the T1_resp message, and records it as time T4;

[0093] 4. In response to the message with time T4 sent by the dispatch center station, the master station, substation and execution station confirm that they have received the message with time T4;

[0094] 5. Calculate the time difference ΔT between the dispatch center station and the main station, substations, and execution stations based on times T1, T2, T3, and T4:

[0095]

[0096] 6. If the time difference ΔT > 1s, then calibrate the local time based on the time difference ΔT. The calibrated local time is:

[0097] T0 ′ =T0+ΔT

[0098] In the formula, T0, T0 ′ This is the local time and the verified local time.

[0099] (2) The content of the offline stability control strategy update sent includes:

[0100] The offline stability control strategy update content is decomposed into a preset number of N sub-contents, and numbered according to the order of decomposition.

[0101] Send the sub-content corresponding to number n=1. In response to receiving the message that the sub-content has been received from the master station, sub-station and execution station, set n=n+1 and repeat the current step until n is greater than N.

[0102] (3) Synchronous updates of offline stabilization strategies based on a multi-level update architecture also include:

[0103] When sending the offline stability control strategy update content, the dispatch center station sends a message with a first checksum CRC. The first checksum CRC is generated by calculating the offline stability control strategy update content according to the standard CRC16 algorithm.

[0104] Before storing the offline stability control policy update content locally, the master station, sub-station, and execution station calculate the received offline stability control policy update content according to the standard CRC16 algorithm to generate a second check code CRC; determine whether the first check code CRC and the second check code CRC are consistent. If they are consistent, reply with a message indicating that the verification has passed; if they are inconsistent, reply with a message requesting retransmission.

[0105] Example 3:

[0106] Based on Embodiment 1, this embodiment of the invention provides a multi-level synchronous update device for offline power grid stability control strategies, including a processor and a storage medium;

[0107] Storage media are used to store instructions;

[0108] The processor is used to perform the steps of the above method according to instructions.

[0109] Example 4:

[0110] Based on Embodiment 2, this embodiment of the invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method.

[0111] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0112] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0114] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0115] 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 multi-level synchronous update method for offline power grid stability control strategy, characterized in that, include: A multi-level update architecture for offline stability control strategies is constructed based on a secure and stable control system, including: A three-layer stability control structure is constructed, comprising a master station, substations, and execution stations from top to bottom; the master station and substations, and the substations and execution stations, are connected via a network; a dispatch center station is constructed, and the master station, substations, and execution stations are connected to the dispatch center station via a switch; Synchronous updates of offline stability control strategies are performed based on a multi-level update architecture, including: In response to the GPS_REQ request message sent by the dispatch center station, the master station, substations and execution stations reply with GPS_RESP request messages; In response to the GPS_RESP request messages from the master station, substations, and execution stations, the dispatch center station determines whether a GPS timing flag exists in the GPS_RESP request message. If a GPS timing flag exists, it sends the offline stability control strategy update content; if no GPS timing flag exists, it performs time synchronization and sends the offline stability control strategy update content after the time synchronization is completed. In response to the stability control offline policy update sent by the dispatch center station, the master station, sub-station and execution station store the stability control offline policy update locally to complete the synchronous update of the stability control offline policy; The time synchronization includes: Response to dispatch center station time When a start message is sent, the master station, substation, and execution station determine the time at which the start message is received, and record it as the time. ; In response to the time-bound message sent by the dispatch center station The message, the time of the main station, the substation and the execution station Reply to the T1_resp message; Response time of main station, sub-station and execution station The dispatch center station determines the time when it receives the T1_resp message, and records it as the time. ; In response to the time-bound message sent by the dispatch center station The master station, substation, and execution station confirm receipt of the message with time. The message; Based on time , , , Calculate the time difference between the dispatch center station and the master station, substations, and execution stations. : ； If time difference Based on time difference The local time has been calibrated and is now verified as follows: ； In the formula, This is the local time and the verified local time.

2. The method for multi-level synchronous update of offline power grid stability control strategy according to claim 1, characterized in that, The main station, substations, execution stations, and dispatch center station are equipped with GPS timing modules.

3. The method for multi-level synchronous update of offline power grid stability control strategy according to claim 1, characterized in that, The updated content of the offline transmission stability control strategy includes: The offline stability control strategy update content is decomposed into a preset number of N sub-contents, and numbered according to the order of decomposition. Send the sub-content corresponding to number n=1. In response to receiving the message that the sub-content has been received from the master station, sub-station and execution station, set n=n+1 and repeat the current step until n is greater than N.

4. The method for multi-level synchronous update of offline power grid stability control strategy according to claim 1, characterized in that, The synchronous update of the offline stability control strategy based on the multi-level update architecture also includes: When sending the offline stability control strategy update content, the dispatch center station sends a message with a first check code CRC. The first check code CRC is generated by the sent offline stability control strategy update content according to the standard CRC16 algorithm. Before storing the offline stability control policy update content locally, the master station, sub-station, and execution station calculate the received offline stability control policy update content according to the standard CRC16 algorithm to generate a second check code CRC; determine whether the first check code CRC and the second check code CRC are consistent. If they are consistent, reply with a message indicating that the verification has passed; if they are inconsistent, reply with a message requesting retransmission.

5. A multi-level synchronous update device for offline power grid stability control strategy, characterized in that, The apparatus is configured to perform the steps of the method according to any one of claims 1-4, the apparatus comprising: The architecture building module is used to build a multi-level update architecture for offline stability control strategies based on a secure and stable control system. The synchronous update module is used for synchronous updates of offline stability control strategies based on a multi-level update architecture.

6. A multi-level synchronous update device for offline power grid stability control strategy, characterized in that, Including processor and storage media; The storage medium is used to store instructions; The processor is configured to operate according to the instructions to perform the steps of the method according to any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1-4.

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