Method for detecting transient voltage stability of power grid

A technology of voltage stability and detection method, applied in the fault location and other directions, can solve the problem of inaccurate detection method of power grid transient voltage stability, and achieve the effect of simple detection and improved accuracy

Active Publication Date: 2014-07-02
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

[0008] Aiming at the technical problem that the existing grid transient voltage stability detection method is not accurate enough, the present invention proposes a more accurate grid transient voltage stability detection method

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  • Method for detecting transient voltage stability of power grid
  • Method for detecting transient voltage stability of power grid
  • Method for detecting transient voltage stability of power grid

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Embodiment Construction

[0030] See figure 1 , figure 1 It is a schematic flow chart of the method for detecting the transient voltage stability of the power grid of the present invention.

[0031] The power grid transient voltage stability detection method includes the following steps:

[0032] S101: Collect grid operation data, including system component parameters, network topology information and load information;

[0033] S102: Set an operation mode set, a typical fault set, and a node set for the power grid according to the system element parameters, network topology structure information, and load information;

[0034] S103: According to the power grid set operation mode set, typical fault set and node set, a computer time domain simulation method is used to perform time domain simulation on various faults of each node in the node set in a specific operation mode, and record all The voltage situation of the node after the fault occurs;

[0035] S104, according to the time-domain simulation result of...

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Abstract

The invention provides a method for detecting the transient voltage stability of a power grid. The method includes the steps of collecting operating data of the power grid, wherein the operating data include system element parameters, network topology structure information and load information; setting an operating mode set, a typical fault set and a node set of the power grid; carrying out time-domain simulation on various faults of nodes in the node set under the specific operating mode according to a computer time-domain simulation method; recording voltage of the nodes after the faults occur; calculating a voltage sag severity index and a voltage qualification index of the nodes and a system when a single fault of the power grid occurs or when the multiple faults of the power grid occur according to the simulation result; judging the transient voltage stability of the nodes and the system according to the voltage sag severity index and the voltage qualification index. The transient voltage stability of the actual power system can be detected more accurately and easily, and the transient voltage stability of any node of the actual power grid and the whole system can be judged according to the voltage sag severity index provided by the method.

Description

Technical field [0001] The invention relates to the technical field of power grid detection, and in particular to a method for detecting the transient voltage stability of the power grid. Background technique [0002] From the late 1980s to the present, the voltage instability and even collapse accidents at home and abroad have caused serious economic losses and put forward new challenges to the safety assessment of power systems. Most voltage collapse accidents originate from the loss of stability of the power system after a large disturbance in a certain operating state, which is a transient instability. Therefore, the detection method of transient voltage stability when the power system is subjected to large disturbances is very important. [0003] At present, the detection methods of transient voltage stability mainly include direct method, limit cut-off time method and transient voltage stability margin method. Their characteristics are described below. [0004] (1) Direct met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 刘育权谢小荣叶萌侯建兰王珂袁志昌王斐孙英云蔡莹
Owner GUANGZHOU POWER SUPPLY CO LTD
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