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Power system transient stability simulating method based on estimation-correction numerical integration

A transient stability and power system technology, applied in the direction of information technology support systems, electrical components, circuit devices, etc., can solve the problems that the calculation speed cannot meet the online calculation requirements of the power system, and the calculation amount is large

Inactive Publication Date: 2012-07-25
ZHEJIANG UNIV
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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem that the existing numerical integration method has a large amount of calculation and the calculation speed cannot meet the online calculation requirements of the power system in the analysis and calculation of the transient stability of the power system, and proposes a method based on estimation-correction numerical integration Numerical Simulation Method for Transient Stability

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  • Power system transient stability simulating method based on estimation-correction numerical integration
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  • Power system transient stability simulating method based on estimation-correction numerical integration

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[0053] The present invention will be further described below in conjunction with accompanying drawing.

[0054] A kind of power system transient stability simulation method based on estimation-correction numerical integration proposed by the present invention comprises the following steps:

[0055] Step 1: Input the original parameters and information of the system, and perform power flow calculation to obtain the operating variable value y(0) under steady-state conditions, including the generator node voltage V(0), the current I(0) injected into the network and the Machine electromagnetic power P ei (0), where i=1, 2, ...N G (N G is the number of generators);

[0056] Step 2: Calculate the initial value δ of the state variable power angle i (0), the initial value ω of the angular frequency i (0);

[0057] Step 3: Form differential equations and network algebraic equations describing the transient process of the system, and factorize the network algebraic equations;

[...

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Abstract

The invention discloses a power system transient stability simulating method based on estimation-correction numerical integration, which is applicable to generators and employs a second-order model. Compared with an existing power system transient stability numerical integration method, the power system transient stability simulating method utilizes an explicit second-order integral for estimated computation of state variables, and utilizes a power-angle integral with four-order precision for correction computation. The method as a single-step algorithm takes angle frequency variation on influence of torque into consideration. Analysis results of a constituted estimation-correction algorithm still are sufficient in precision in a large integration step (0.1-0.12 second), so that the simulating speed of transient stability is remarkably increased.

Description

technical field [0001] The invention belongs to power system automation, and in particular relates to a numerical simulation method for power system transient stability. Background technique [0002] Power system transient stability analysis is one of the most basic and core contents in power system analysis and calculation. 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 precondition for realizing these advanced technologies is fast, accurate and reliable transient stability simulation calculation for large-scale power systems. [0003] Commonly used methods for power system transient stability analysis mainly include numerical integration method, direct method, and hybrid analysis method combining numerical integration and direct method. Numerical integration is the most accurate and reliable method fo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H02J3/00
CPCY02E60/76Y02T10/82Y04S40/22
Inventor 王建全华子钧赵志奇
Owner ZHEJIANG UNIV
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