Power grid topology error identification method based on branch active power flow

An identification method and technology of power grid topology, applied in the field of power grid, can solve problems such as switching state misjudgment, topology error, affecting dispatcher decision-making, etc., and achieve the effect of avoiding topology error and high precision

Inactive Publication Date: 2015-10-28
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] For a long time, due to the influence of grid collection equipment and transmission channels, switch status errors cannot be effectively avoided, and the actual effect of conventional identification methods is not ideal
Conventional switch state identification and estimation methods are relatively simple, and some simple expert rules are generally used for identification. Misjudgment of the switch status leads to topology errors and affects dispatcher decision-making

Method used

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  • Power grid topology error identification method based on branch active power flow

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing:

[0016] Such as figure 1 As shown, this grid topology error identification method based on branch active power flow includes the following steps:

[0017] 1) Read the grid model and measurement section;

[0018] 2) Transform the physical model of the power grid into a mathematical model;

[0019] 3) Perform network topology analysis and generate node branch models;

[0020] 4) According to the acquisition state of the switch or knife switch, process them separately; for the switches with the same topological point on both sides, and the acquisition state is divided, the switches are merged to form a switch group;

[0021] 5) Initialize the active power flow of the branch where the switch and the switch group are located. For the switch and the switch group whose collection state is divided, the branch power flow measurement is set to zero; for the switch whose collection ...

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Abstract

The invention relates to a power grid topology error identification method based on the branch active power flow. The method includes following steps: reading a power grid model and measuring a section; generating a node branch model; merging a part of switches to a switch group; setting active power flow state quantities of the switches and the switch group; building a branch active power flow estimation model; and performing estimation by employing the weighted least absolute value or solving the estimation value by employing the weighted least squares. By adopting the method, the states of switch-on and switch-off of a switch are respectively estimated by employing the active power flow, the precision is high, and topology errors due to measurement error are effectively avoided.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a power grid topology error identification method based on branch active power flows. Background technique [0002] Power grid topology errors directly affect various calculation results. Topological errors are closely related to the open state. Identifying the switch state before calculation is a necessary means to avoid topology errors. [0003] For a long time, due to the influence of grid collection equipment and transmission channels, switch state errors cannot be effectively avoided, and the actual effect of conventional identification methods is not ideal. Conventional switch state identification and estimation methods are relatively simple, and some simple expert rules are generally used for identification. Misjudgment of the switch status leads to topology errors and affects the dispatcher's decision-making. Contents of the invention [0004] The present invention aims to ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06Q50/06
CPCY04S10/50
Inventor卢冰钱海峰杨力强陈家乾蒋水中黄斌卢敏陈利跃孙柯徐军岳沃建栋余亮吕育青魏亮
OwnerSTATE GRID CORP OF CHINA