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A method of searching for optimal cross-sections based on active decoupling based on electrical distance

A technology of electrical distance and search method, applied in the direction of electrical digital data processing, data processing applications, instruments, etc., can solve problems such as easy to fall into local optimal solutions, and achieve the effect of meeting the needs of scheduling operations, simple process, and less original data

Active Publication Date: 2017-09-22
STATE GRID CORP OF CHINA +2
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  • Description
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  • Application Information

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Problems solved by technology

The particle swarm optimization algorithm is used to search for the solution scheme under the constraint conditions, but this method has great difficulties in the process of processing the global optimal solution, and it is easy to fall into the local optimal solution.

Method used

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  • A method of searching for optimal cross-sections based on active decoupling based on electrical distance
  • A method of searching for optimal cross-sections based on active decoupling based on electrical distance
  • A method of searching for optimal cross-sections based on active decoupling based on electrical distance

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Experimental program
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Embodiment

[0027] 1. First introduce this method, which includes the following steps:

[0028]Step S1, collect the electrical characteristic quantities of the large power grid at different times, and obtain the dynamic response data of the large power grid according to the electrical characteristic quantities; in this step, collect the electrical characteristic quantities of the large power grid, and integrate the collected electrical characteristic quantities of the large power grid , to obtain the power characteristics of the large power grid at different times, that is, to collect the data of the data acquisition and monitoring control system, the synchrophasor measurement unit data and the network topology data of the large power grid at different times, and integrate the collected electrical characteristic data , to get the dynamic response data of the large power grid.

[0029] Step S2, construct the undirected edge weight graph G of the power system, and assign weights to all edge...

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Abstract

The invention belongs to the field for reasonably selecting lower isolation places under a large power grid serious fault, and particularly relates to an active disconnection optimum fracture surface searching method based on electrical distance. According to the method, the shortest electrical distance between nodes is obtained through a Dijkstra algorithm, and the nodes are divided into common nodes and general nodes according to the strength of electrical relations between all the nodes; according to the relations between the disconnection fracture surfaces and the common nodes, the searching of the disconnection fracture surfaces is transformed into processing of the common nodes; with the smallest active power unbalanced power in a disconnected subsystem as a target function, the common nodes are searched for based on a width precedence algorithm, and the optimum disconnection fracture surface is obtained. The method has the advantages that the requirement for high speed of online calculation is met, and the method can adapt to changes of the operating mode of the system, and the actively disconnected optimum fracture surfaces can be accurately and effectively captured.

Description

technical field [0001] The invention belongs to the problem of selecting a decoupling section under a severe fault of a large power grid, and in particular relates to a search method for an active decoupling optimal section based on electrical distance. Background technique [0002] With the formation of my country's ultra-large synchronous interconnected power grid, local disturbances generated somewhere in the system will spread to the entire power grid through tie lines. In order to avoid the occurrence of blackout accidents, out-of-step splitting, as the third line of defense of the power system, is an important means to eliminate power grid oscillation and ensure the safe and stable operation of the power system. Out-of-step de-loading is mainly divided into two categories: passive de-loading and active de-loading. Passive de-loading is a de-loading device installed based on off-line simulation and operating experience. It starts the device based on judging whether the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06Q10/04G06Q50/06
Inventor 唐飞王乙斐廖清芬杨健朱振山涂炼刘福锁
Owner STATE GRID CORP OF CHINA
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