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Method and system for synchronously updating online strategy definite values

A synchronous update and strategic technology, applied in the direction of electrical components, circuit devices, parts of emergency protection devices, etc., can solve problems such as poor economic performance, grid instability, overcutting, etc.

Active Publication Date: 2019-10-18
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The offline strategy is formulated by the operator in consideration of the operation mode, but when there are some extreme operation modes in the actual power grid, the offline security control strategy will fail;
[0005] 2. The offline strategy is formulated based on certain specific faults. If there are multiple sequential faults in the power grid, it will lead to a mismatch in the strategy table, and there is a risk of instability in the power grid;
[0006] 3. The offline strategy is not the best setting for some operating modes, which will lead to overcutting and poor economic performance in actual operation;
[0007] 4. Offline strategy formulation is complex, and requires experienced workers in the process of analysis, aggregation, and classification, making it a huge challenge

Method used

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  • Method and system for synchronously updating online strategy definite values
  • Method and system for synchronously updating online strategy definite values

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The specific design steps of each link of the inventive method are as follows:

[0041] 1. When the device is powered on, the dispatcher reads the network data and the EMS system reads the operating parameters of the power grid;

[0042] 2Switch the whole group of security control according to the setting value of the large-scale security control system, and set the switching delay △T=15s (△T is the delay from the time when the dispatching terminal sends the fixed value to the time when the fixed value is updated);

[0043] 3 N sets of security control systems all use their own offline strategy to set the value;

[0044] 4. Determine whether the communication channels between the dispatching terminal and N sets of security control systems are all normal? If all are, go to step (5); if not all, go back to step (3);

[0045] In the embodiment, the security control system sends a heartbeat message control word (set to 1) to the dispatch center every 1s. If the dispatch c...

Embodiment 2

[0057] The steps are as follows:

[0058] 1. When the device is powered on, the dispatcher reads the network data and the EMS system reads the operating parameters of the power grid;

[0059] 2Switch the whole group of security control according to the setting value of the large-scale security control system, and set the switching delay △T=15s (△T is the delay from the time when the dispatching terminal sends the fixed value to the time when the fixed value is updated);

[0060] 3 N sets of security control systems all use their own offline strategy to set the value;

[0061] 4. Determine whether the communication channels between the dispatching terminal and N sets of security control systems are all normal? If all are, go to step (5); if not all, go back to step (3);

[0062] In this embodiment, the security control system sends a heartbeat message control word (set to 1) to the dispatch center every 0.5s. If the dispatch center cannot receive the heartbeat message control...

Embodiment 3

[0074] The steps are as follows:

[0075] 1. When the device is powered on, the dispatcher reads the network data and the EMS system reads the operating parameters of the power grid;

[0076] 2Switch the whole group of security control according to the setting value of the large-scale security control system, and set the switching delay △T=15s (△T is the delay from the time when the dispatching terminal sends the fixed value to the time when the fixed value is updated);

[0077] 3 N sets of security control systems all use their own offline strategy to set the value;

[0078] 4. Determine whether the communication channels between the dispatching terminal and N sets of security control systems are all normal? If all are, go to step (5); if not all, go back to step (3);

[0079] In this embodiment, the security control system sends a heartbeat message control word (set to 1) to the dispatch center every 1s. If the dispatch center cannot receive the heartbeat message control w...

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Abstract

The invention discloses a method and a system for synchronously updating online strategy definite values. The method comprises the following steps: when the time interval of every two adjacent onlinestrategy definite value calculations of safety control systems is greater than a critical value at a dispatching end, calculating the online strategy definite values corresponding to the safety control systems at the dispatching end, and sending definite value generating moment T0, invalid moment Tt and respectively corresponding online strategy definite value lists to the safety control systems;determining that respective online strategy definite values are received by each buffer area of the safety control systems at the dispatching end, determining that the online strategy definite valuesof the safety control systems meet validity checking respectively, and when the absolute time t of the safety control systems is in advance of invalid moment Tt, controlling each safety control systemto be completely updated into checked online strategy definite values after handover delay delta T is met. According to the method disclosed by the invention, time marks are taken as references, thereliability of the online definite values is checked, and the synchronism for the online definite values of the large-scale safety control system is also guaranteed.

Description

[0001] Technical field: The present invention belongs to the field of electric power system automation, and more specifically relates to a method for implementing synchronous updating of online policy settings for large-scale security control systems. Background technique: [0002] The safety and stability control system is the second line of defense to ensure the safe and stable operation of the power grid. In a certain operation mode, control strategies are formulated for some expected faults. Therefore, an effective and reliable safety and stability control strategy is the core of the safety and stability control system, and it is also Guarantee of stable operation. [0003] At present, the offline strategy is widely used in the safety and stability control system, but the offline strategy mainly has the following problems: [0004] 1. The offline strategy is formulated by the operator in consideration of the operation mode, but when there are some extreme operation modes i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H1/00H02J13/00
CPCH02J13/0013H02H1/0061
Inventor 李铁唐俊刺姜枫苏安龙高凯刘淼刘刚张艳军孙明一许小鹏张宇时武力伦涛宁辽逸周纯莹胡浩刘凯高鸿飞时伯年孙刚冯占稳詹克明朱伟峰杨晓明曾辉李正文王印王亮王明凯
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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