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Network algebraic equation solution preprocessing method and system based on power angle equivalent method

A technique of algebraic equations and equivalent methods, applied in the field of preprocessing for solving network algebraic equations

Pending Publication Date: 2019-08-13
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The technical scheme of the present invention provides a network algebraic equation solution preprocessing method and system based on the power angle equivalent method to solve the problem of how to solve the preprocessing problem based on the power angle equivalent method

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  • Network algebraic equation solution preprocessing method and system based on power angle equivalent method
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  • Network algebraic equation solution preprocessing method and system based on power angle equivalent method

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[0040] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0041] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a network algebraic equation solution preprocessing method and system based on a power angle equivalent method, and the method comprises the steps: carrying out the optimization sorting of the bus nodes of dynamic elements, carrying out the initialization calculation of the dynamic simulation of a power system, and obtaining the initial value of the state variable of each dynamic element; calculating an equivalent matrix of each generator based on the initial power angle of each generator, and generating an approximate matrix in a block diagonal form; superposing the approximate matrix to a network admittance matrix to generate an improved admittance matrix, and performing LU decomposition on the improved admittance matrix to obtain a decomposition result; carryingout separate solution in a single time step on the differential equation and the algebraic equation by utilizing a decomposition result, and carrying out iterative computation to enable the differential equation and the algebraic equation to meet a convergence condition; outputting a discrete solution result in a single time step; and judging whether the approximation matrix is effective or not byutilizing a discrete solution result.

Description

technical field [0001] The present invention relates to the technical field of power system simulation and calculation, and more specifically, to a preprocessing method and system for solving network algebraic equations based on power angle equivalent method. Background technique [0002] The mathematical model of the dynamic process of the power system is a set of differential algebraic equations (Differential AlgebraicEquation, DAE), in which the differential equations represent the dynamic characteristics of the power system components; and the algebraic equations represent the topological constraints of the power system transmission network, which are formed by the node voltage method. Due to the nonlinear characteristics of some dynamic components, the DAE equation has no analytical solution, and the numerical integration calculation method is used to solve it. First, the differential equation is discretized into a difference equation, and then the nonlinear algebraic e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 戴汉扬汤涌宋新立仲悟之吴国旸叶小晖刘涛苏志达王毅李霞王晓彤穆世霞肖雄许克乔宝榆王顺来孙振
Owner CHINA ELECTRIC POWER RES INST
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