Electric power system transient stability analysis method

A technique for transient stability analysis, power systems, applied in the field of nonlinear optimization

Pending Publication Date: 2017-12-29
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] The purpose of the present invention is to improve the conservatism problem caused by the approximate p...

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  • Electric power system transient stability analysis method
  • Electric power system transient stability analysis method
  • Electric power system transient stability analysis method

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Embodiment Construction

[0059] Such as figure 1 , figure 2 As shown, the present invention discloses a transient stability analysis method based on a power system, which uses SMR technology to improve the transient energy function method. The power system transient stability analysis methods mainly include time domain simulation method and direct method, and the transient energy function method belongs to the direct method. The transient energy function method model is relatively simple, can take into account nonlinear problems, can avoid complex numerical integration operations, has a fast calculation speed, and can also provide system stability margin indicators, but due to model accuracy, critical point selectivity and linear path Due to the limitations of the assumptions, the traditional transient energy function has always had the problem of conservatism. The improved transient energy function method based on the SMR (Squared Matrix Representation) technology proposed by the present invention...

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Abstract

The present invention discloses an electric power system transient stability analysis method. The electric power system transient stability analysis method mainly comprises a time domain simulation method and a direct method. A transient energy function method belongs to the direct method. The transient energy function method model is simple, considers the non-linear problem, can avoid complex numerical integration operation, is fast in computing speed and can provide system stability margin indexes, and the restriction of the model precision, critical point selectivity and linearity path hypothesis allows a traditional transient energy function to always have the conservation problem. The improved transient energy function method based on the SMR (Squared Matrix Representation) technology introduces the SMR technology to improve the transient energy function analysis method, a superposition program is employed to obtain the optimal Lyapunov function so as to improve the problem of a traditional transient energy function conservation.

Description

technical field [0001] The invention relates to an improved transient energy function method based on SMR technology, which belongs to the fields of transient stability analysis, transient energy function research and nonlinear optimization of power systems. Background technique [0002] The interconnection of power systems forms an interconnected power system, which can bring significant technical and economic benefits. However, the larger the scale of the power system, the more interconnected parts, and the failure of any one of the components may cause the accident to expand. If the power grid structure is not strong enough, or the safety automatic devices are not sound enough, or the management is improper, the system may fall into a stability crisis, causing system stability damage or even large-scale power outages, or even the collapse of the entire network. Therefore, the operation and planning of large-scale power systems both at home and abroad put the stability an...

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
CPCH02J3/00G16Z99/00
Inventor 汪成根杨阳卜京张梦月王俊周前张宁宇胡昊明
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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