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Subsynchronous resonance characteristic value analysis model of multi-machine system

A technology of eigenvalue analysis and subsynchronous resonance, which is applied in the direction of control system, generator control, reducing/preventing power oscillation, etc., can solve problems such as not being able to write constant coefficient differential equations, and achieve the effect of suppressing subsynchronous resonance

Inactive Publication Date: 2013-10-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Therefore, the system of differential equations with constant coefficients cannot be written in the abc coordinate system

Method used

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  • Subsynchronous resonance characteristic value analysis model of multi-machine system
  • Subsynchronous resonance characteristic value analysis model of multi-machine system
  • Subsynchronous resonance characteristic value analysis model of multi-machine system

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Embodiment Construction

[0014] The invention provides a multi-machine system sub-synchronous resonance eigenvalue analysis model. The subsynchronous resonance linearization eigenvalue analysis should include the shaft system equation of the turbogenerator, the generator voltage and flux linkage equation, the electromagnetic transient equation of the transmission line, the electromagnetic transient equation of the series compensation capacitor, and the excitation controller and other control system equations . The present invention will be described below with an example of analysis of the subsynchronous resonance eigenvalue of a multi-machine system.

[0015] 1. Eigenvalue analysis model of multi-machine system of turbo-generator set with different parameters

[0016] 1. Generator shafting equation

[0017] Taking the shafting parameters of the first standard calculation example of IEEE subsynchronous resonance as an example, the shafting of the turbogenerator set is divided into six shaft sections...

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Abstract

The invention discloses characteristic value analysis model and step for the subsynchronous resonance analysis of a multi-machine power system, relating to the field of characteristic value analysis models of the subsynchronous resonance analysis of the power system. The deducing and calculating process of a method comprises the following step of: respectively writing a rotor motion equation of a multimass block model of a shaft system of a steam turbine generator, an electromagnetic transient state equation of a magnetic chain and the voltage of a generator, an electromagnetic transient state equation of a power transmission line, an electromagnetic transient state equation of a series-connected compensation capacitor and a control system equation of an excitation controller and the like. The invention obtains a differential equation set related to a state quantity by linearizing the equations on a stable-state operating point and can solve the characteristic value and the characteristic vector of a state equation coefficient matrix on the basis, obtain much information related to resonance damping characteristics by judging the stability of the subsynchronous resonance of the multi-machine power system and can be used for designing a controller to inhibit the subsynchronous resonance of the multi-machine power system by combining with a control theory.

Description

technical field [0001] The invention relates to a subsynchronous resonance analysis method of a power system, in particular to an eigenvalue analysis model of the subsynchronous resonance of a multi-machine power system. technical background [0002] Among the analysis methods of subsynchronous resonance in power system, the eigenvalue analysis method is a rigorous and accurate analysis method based on linear system theory. The eigenvalue analysis model is very effective and can provide a large amount of characteristic information of the researched object. On the basis of the model obtained by linearizing the small disturbance of the research object, the eigenvalue analysis method can judge the stability of the subsynchronous resonance of the system by solving the eigenvalues ​​and eigenvectors of the coefficient matrix of the system state equation, and obtain the resonance damping characteristics Much information about it; combined with control theory, it can also be used ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02P9/00
Inventor 张鹏毕天姝薛安成肖仕武杨奇逊
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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