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Short-circuit current calculation method and device based on dynamic phasor time domain method

A technology of dynamic phasor and short-circuit current, which is applied in calculation, electrical digital data processing, instruments, etc., and can solve problems such as insufficient calculation accuracy

Active Publication Date: 2019-04-16
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] This application provides a short-circuit current calculation method based on the dynamic phasor time-domain method, which solves the problem of insufficient calculation accuracy of the short-circuit current standard simplified and practical calculation method in the case of short-circuits occurring near long-distance transmission lines, series compensation capacitors, etc.

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  • Short-circuit current calculation method and device based on dynamic phasor time domain method
  • Short-circuit current calculation method and device based on dynamic phasor time domain method
  • Short-circuit current calculation method and device based on dynamic phasor time domain method

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Embodiment Construction

[0042] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0043] Please see figure 1 , figure 1 is a short-circuit current calculation method based on the dynamic phasor time-domain method provided by the embodiment of the present application, combined below figure 1 The method provided in the embodiment of the present application will be described in detail.

[0044] Step S101, establishing a component dynamic phasor model suitable for calculating the short-circuit current of a three-phase AC system.

[0045] Before establishing the component dynamic phasor model suitab...

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Abstract

The invention discloses a short-circuit current calculation method based on a dynamic phasor time domain method. The short-circuit current calculation method comprises the steps of establishing an element dynamic phasor model suitable for short-circuit current calculation of a three-phase alternating current system; converting the dynamic phasor model into an algebraic equation by using a trapezoidal integration method to obtain a conductance matrix of a fault node; triangular decomposition is carried out on the conductance matrix, a formula obtained after triangular decomposition is used forcarrying out current calculation on a faulted circuit, and the problem that the calculation precision is insufficient when a short-circuit current standard simplified practical calculation method generates short circuit at the positions near a long-distance power transmission line and a series compensation capacitor is solved.

Description

technical field [0001] The application relates to the fields of power grid planning and operation, and power system simulation analysis, and specifically relates to a short-circuit current calculation method based on a dynamic phasor time-domain method, and to a short-circuit current calculation device based on a dynamic phasor time-domain method. Background technique [0002] The calculation of short-circuit current is a routine content of power system analysis. It is necessary to carry out short-circuit current calculation for the selection of electrical equipment and the setting of relay protection settings for conductors. The simulation of short-circuit process in power system involves electromagnetic transient calculation. However, due to the large scale of the actual power system, it will be very difficult to calculate the short-circuit current by using the existing electromagnetic transient calculation method. The purpose of standardizing the calculation of short-circ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 张彦涛杨京齐王蒙曹生顺
Owner CHINA ELECTRIC POWER RES INST
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