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Power grid transient stabilization analysis method based on MATLAB

A power grid transient stability and analysis method technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems that have not yet been put into the power system, simulation calculation speed, and new equipment models cannot meet the needs of power grid development. It achieves the effects of convenience and implementation, ensuring safe and stable operation, and high programming efficiency

Inactive Publication Date: 2016-10-12
JILIN UNIV
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Problems solved by technology

Some power system simulation software can no longer meet the needs of current power grid development in terms of simulation calculation speed and new equipment models
[0004] With the rapid improvement of power system simulation refinement requirements, relevant research has been valued by universities and scientific research institutions, but at present, the research is concentrated on theory and small experiments, and has not been put into the actual operation of the power system.

Method used

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  • Power grid transient stabilization analysis method based on MATLAB
  • Power grid transient stabilization analysis method based on MATLAB
  • Power grid transient stabilization analysis method based on MATLAB

Examples

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Embodiment

[0089] Example: Press Figure 4 The provided data is used to write matlab programs, Figure 4 Diagram of the IEEE9 node test system. A three-phase short-circuit fault occurs on the 9-node network line, and the time for the fault is 1 second. The three-phase short-circuit fault is removed at 1.5 seconds, and the power angle curve obtained is as follows Figure 5 , Image 6 Shown. Taking generator No. 1 as a reference, the power angle difference with the other two generators 21 and 31 is obtained. It can be seen from the curve that the system has a series of oscillations after the failure. After the fault is removed, the system oscillation presents a decay trend, and finally the system basically returns to the state before the fault occurred. Therefore, it can be determined that the transient state of the system is stable.

[0090] The fault occurrence time is 1 second, the line has a three-phase short circuit fault, and the power angle curve with a removal time of 2.5 seconds is...

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Abstract

The invention belongs to the electric power system simulation technology field and particularly relates to a power grid transient stabilization analysis method based on MATLAB. The method comprises steps that a power grid safety stabilization analysis calculation model is determined; electric power balance and trend mode selection is carried out; trend analysis is carried out; system transient stabilization analysis is carried out. The method fully performs properties of high programming efficiency, good reliability and strong timeliness of MATLAB, a complex control method of an electric power system can be precisely simulated, rapid model self-definition can be realized, properties of strong scalability, intelligible performance and convenient operation can be realized, and demands of an electric power system in the new situation can be satisfied.

Description

Technical field [0001] The invention belongs to the technical field of power system simulation, and particularly relates to a MATLAB-based power grid transient stability analysis method. Background technique [0002] The power system is a complex dynamic system that is constantly disturbed at all times. The time, place, type, and severity of the disturbance are all random. Once the stability problem occurs in the system dynamic process after the disturbance occurs, The system may have serious consequences within a few seconds, causing great economic losses and social impact. Therefore, a large amount of transient stability analysis is required in the planning, design, and operation of the power system. [0003] However, as the scale of the power grid continues to expand, the order of transient stability equations is getting higher and higher, and new components are continuously connected to the power grid, which puts forward higher requirements for power system simulation calculat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/50
CPCG06F30/367G06F2119/06H02J3/00H02J2203/20Y02E60/00
Inventor 孙淑琴曹华松王翀吴晓蓉秦美琪李永彬
Owner JILIN UNIV
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