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A Design Method of Multi-Equilibrium Nonlinear System for Dynamic Stability Control

A nonlinear system and multi-balance point technology, which is applied in the design field of multi-balance point nonlinear systems, can solve problems such as the design method of dynamic stability controller that has not been proposed

Active Publication Date: 2016-08-03
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

However, since the frequency domain condition has certain difficulties in the verification process, it needs to be further simplified
In addition, no corresponding dynamic stability controller design method has been proposed in the above literature

Method used

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  • A Design Method of Multi-Equilibrium Nonlinear System for Dynamic Stability Control
  • A Design Method of Multi-Equilibrium Nonlinear System for Dynamic Stability Control
  • A Design Method of Multi-Equilibrium Nonlinear System for Dynamic Stability Control

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Embodiment Construction

[0063] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] The main idea of ​​the present invention is to first judge whether the system is stable, if not, control it by designing a controller to ensure the stability of the system.

[0065] The present invention first uses the KYP lemma to transform the gradient-like frequency domain condition. The KYP lemma is a basic conclusion widely used in the field of dynamic system analysis and feedback control. By transforming the frequency-domain inequality into the equivalent time-domain linear matrix inequality (LMI), the KYP lemma provides a numerical system analysis and synthesis Analytical method. Based on the obtained time-domain linear matrix inequality conditions, the present invention further designs a controller for the closed-loop system to ensure its gradient-like property, and provides a corresponding solution metho...

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Abstract

The invention provides a method for designing a multi-balance point nonlinear system for dynamic stability control. The method comprises the following steps of: 1) establishing a synchronous unit model, and determining a gradient-like definition; 2) judging the gradient-like performance of the synchronous unit model, and if the synchronous unit model is chaotic, executing the step 3); 3) performing controller design on the synchronous unit model in the step 1); and 4) performing dynamic stability analysis and control on a power system by using a controller in the step 3), so the dynamic stability of the whole power system is ensured. According to a dynamic stability control method which is employed in the invention, the linearization of the conventional like methods is eliminated, so accumulated errors which are generated in the method are greatly reduced, and a future practical engineering guiding function is realized.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a design method for a multi-balance point nonlinear system used for dynamic stability control. Background technique [0002] With the formation of regional interconnected grids, the dynamic security and stability of power systems have become more complex, including the dynamic characteristics of regional interconnected power systems, the operation control of regional interconnected grids, the voltage stability of receiving end systems, AC and DC system interactions, etc. These problems make the safe and stable operation of the power system face new challenges, and also put forward new requirements for the analysis and control of power system safety and stability. However, so far, the methods for solving small disturbance dynamic stability wide-area control of power systems have brought certain cumulative errors to controller design due to the introduction of linearization methods. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/00
Inventor 徐式蕴汤涌孙华东
Owner CHINA ELECTRIC POWER RES INST
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