Method for stimulating electromagnetism transient of electric system comprising multiple electric electronic switches

A power electronic switch, electromagnetic transient simulation technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as non-prototype oscillation and state quantity jump

Active Publication Date: 2015-01-28
TSINGHUA UNIV +1
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Problems solved by technology

This model can simulate the ideal switch action characteristics, but in terms of numerical algorithms, it will cause state quantity jumps, and then cause non-prototype oscillations in electromagnetic transient calculations

Method used

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  • Method for stimulating electromagnetism transient of electric system comprising multiple electric electronic switches
  • Method for stimulating electromagnetism transient of electric system comprising multiple electric electronic switches
  • Method for stimulating electromagnetism transient of electric system comprising multiple electric electronic switches

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Embodiment Construction

[0062] The electromagnetic transient simulation method of the power system containing multiple power electronic switches proposed by the present invention, its flow chart is as follows figure 1 As shown, the method includes the following steps:

[0063] (1) Establish a branch-level equivalent model of the power system, the specific process is as follows:

[0064] In power system electromagnetic transient simulation, typical components in the branch include: generator, transmission line, resistance-inductance (RL) series branch, resistance-capacitance (RC) series branch, regulator, load, transformer, busbar, AC line, DC line, reactive power compensator and shunt capacitor reactor etc. The state quantity in the electromagnetic transient simulation of power system generally refers to the capacitor voltage in the resistor-capacitor (RC) series branch and the inductor current in the resistor-inductor (RL) series branch.

[0065] (1-1) Set the voltage and current characteristic eq...

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Abstract

The invention relates to a method for stimulating an electromagnetism transient of an electric system comprising multiple electric electronic switches and belongs to the technical field of electromagnetism transient analysis of electric systems. According to the method, models for on and off of electric electronic switches are provided by use of the constant impulse response principle. The method comprises the following steps: respectively building a general branch equivalent model and an electric electronic switch equivalent model, and respectively obtaining electromagnetism transient simulation results under various step lengths by virtue of a node voltage equation. The method can be used for solving the problem of state quantity jump numerical oscillation of multiple electric electronic switch models of the electric system. The method for stimulating the electromagnetism transient of the electric system comprising the multiple electric electronic switches can be used for providing a new means for modeling the electromagnetism transient switches of the electric system, and is especially applicable to electromagnetism transient simulation calculation for the electric system comprising multiple electric electronic switch devices such as a modular multilevel module and a high-voltage direct-current module.

Description

technical field [0001] The invention relates to a power system electromagnetic transient simulation method containing multiple power electronic switches, belonging to the technical field of power system electromagnetic transient analysis. Background technique [0002] With the continuous expansion and interconnection of the power system scale and the increasing number of power electronic equipment, electromagnetic transient analysis technology has become a key technology for the safe and stable operation of the power grid. However, in the electromagnetic transient simulation of power system, if the switch in the network adopts the traditional binary resistance model, it will cause the state quantity jump in the network, and then cause the non-prototype oscillation numerical phenomenon. This phenomenon is more obvious when the number of power electronic switch modules increases in the power system. [0003] The traditional electromagnetic transient analysis method is based o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 舒德兀张树卿欧开健张春朋姜齐荣
Owner TSINGHUA UNIV
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