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Method for detecting voltage stability based on power transfer path

A voltage stability and power transmission technology, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve the problem of voltage stability problems such as complex detection process

Active Publication Date: 2008-11-05
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the current problem of complex detection process of voltage stability problem, and propose a voltage stability detection method based on power transmission path. To the voltage stability index of the system, this index is used in combination with the reactive power reserve index to determine the voltage stability of the system and whether corresponding control measures need to be taken

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  • Method for detecting voltage stability based on power transfer path
  • Method for detecting voltage stability based on power transfer path
  • Method for detecting voltage stability based on power transfer path

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] A voltage stability detection method based on a power transmission path, its method is,

[0044] 1) Carry out power flow calculation on the power grid system, and obtain the voltage, current, active power and reactive power information of each node of the power grid in the system;

[0045] 2) Calculate the local stability index and determine the set of weak load nodes;

[0046] 3) Determine the key power source points and path participating nodes according to the electrical distance information, and generate the weak power transmission path set of the system;

[0047] 4) Perform equivalent value for each weak path, determine the weakest power transmission path, and obtain the voltage stability index of the system;

[0048] 5) Determine the reactive power reserve index of the system, use the obtained voltage stability index and reactive power re...

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Abstract

The present invention discloses a voltage stability testing method based on the power transmission path. The invention settles the problem that the process for detecting the voltage stability is complicated. The method of the invention is used for detecting the voltage stability based on the power transmission path, and the method comprises the following steps: 1) executing a current computing to the electric network system, and obtaining the information of voltage, current, wattful power and reactive power of each node of electric network in the system; 2) computing a partial stability index, and confirming an assembly of the weak load node; 3) confirming the key power source node and path participation node according to the electric distance information, and generating an assembly of the weak power of the system; 4) respectively equalizing each weak path, confirming the weakest power transmission path and obtaining the index of voltage stability of system; and 5) confirming the reactive power holding index of the system, and confirming the voltage stabilization degree of the system and whether a corresponding control measure should be executed according to the obtained index of the voltage stabilization and the reactive holding index.

Description

technical field [0001] The invention relates to a voltage stability detection method based on a power transmission path, belongs to the technical field of power system operation and analysis, and proposes a voltage stability index for voltage stability evaluation and a calculation method for voltage stability evaluation. Background technique [0002] With the development of the power system towards large units, large power grids, high voltage and long-distance power transmission, several large power grids in the world have successively experienced large-scale blackouts characterized by voltage collapse, which has drawn widespread attention to the issue of voltage stability. Voltage stability assessment has become an important aspect that must be considered in power grid planning, design and operation. Scholars at home and abroad have analyzed the problem of voltage stability from different angles, and have achieved certain theoretical research results. Evaluation, in order ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
Inventor 牛新生王亮刘玉田
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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