Electric power system transient stability simulation method based on implicit fine numerical integral

A numerical integration and transient stability technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as large amount of calculation and calculation speed that cannot meet the online calculation requirements of power systems

Inactive Publication Date: 2012-09-12
ZHEJIANG UNIV
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Problems solved by technology

[0010] The purpose of the present invention is to solve the shortcomings of the existing numerical integration method in the transient stability simulation calculation of the power system, which has a large amount of calculation, and the calculation speed cannot meet the online calculation requirements of the power system. A new numerical integration simulation method for transient stability is proposed

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  • Electric power system transient stability simulation method based on implicit fine numerical integral
  • Electric power system transient stability simulation method based on implicit fine numerical integral
  • Electric power system transient stability simulation method based on implicit fine numerical integral

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with accompanying drawing.

[0042] The invention proposes a new high-precision numerical simulation method based on the Doha-Mill integral of the nonlinear equation. The difference between the method of the present invention and the traditional numerical integral simulation method is that the nonlinear differential equations describing the transient process of the power system are expressed as linear and nonlinear parts. By finely solving the state transition matrix of the linear part and reasonably selecting the integrable function approaching the nonlinear part, a higher precision numerical integration formula is obtained. This method has good adaptability to the model, and can add and create a new model conveniently without cumbersome steps.

[0043] The following is attached figure 1 The present invention is further described.

[0044] A kind of power system transient stability simulation metho...

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Abstract

The invention discloses an electric power system transient stability simulation method based on a fine integral algorithm. Compared to an existing electric power system transient stability value integral method, in the method of the invention, non-linear differential equations describing an electric power system transient process are expressed as a linear part and a nonlinear part. Through reasonably selecting a system matrix of the linear part and using an integrable function to approximate a nonlinear term function, an implicit fine single step integral formula is derived. Through finely solving a state transition matrix corresponding to a linear part system matrix, the integral formula with high precision can be obtained so as to reduce a calculated amount of the transient stability simulation.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular relates to a power system transient stability simulation method based on implicit fine numerical integration. Background technique [0002] Power system transient stability analysis is one of the most basic and core contents in power system analysis and calculation. With the development of power system operation control technology, advanced technologies such as online dynamic security analysis, security and stability emergency control, preventive control, and intelligent dispatching have been gradually popularized and applied in power systems. The prerequisite for the realization of these advanced technologies is to be able to quickly, accurately and reliably calculate the transient stability of large-scale power systems. [0003] Numerical integration method and direct method, and a hybrid analysis method combining numerical integration and direct method are th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38G06F19/00
Inventor 王建全赵志奇吕晓祥
Owner ZHEJIANG UNIV
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