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A finite-time adaptive fuzzy tracking control method for power systems with full state constraints

An adaptive fuzzy and power system technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as loss of nonlinear characteristics and inability to obtain control effects

Active Publication Date: 2022-04-26
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

In the process of linear transformation of the system, the nonlinear characteristics will be lost, and the expected control effect cannot be obtained in the actual design process

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  • A finite-time adaptive fuzzy tracking control method for power systems with full state constraints
  • A finite-time adaptive fuzzy tracking control method for power systems with full state constraints
  • A finite-time adaptive fuzzy tracking control method for power systems with full state constraints

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Embodiment Construction

[0133] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific implementations are now described in detail.

[0134] The present invention provides a finite-time tracking control method for a single-machine infinite power system containing SVC, and the controller is designed based on an adaptive backstepping method. First, the unknown parameters and external disturbances in the power system are approximated by using a fuzzy logic system (FLS); Then, the virtual control signal is filtered using a finite-time command filter (FTCF), which solves the "computational explosion" problem in traditional backstepping. Under the condition that the state variable does not violate the constraint condition, the control scheme of the present invention realizes that the power angle of the generator in the power system reaches the neighborhood near the expected value within a limited time, and all variables in the closed-loop s...

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Abstract

The invention relates to a finite-time self-adaptive fuzzy tracking control method for a full-state constrained power system. The controller is designed based on the self-adaptive backstepping method, and the fuzzy logic system is used to approximate unknown parameters and external disturbances in the power system; the finite-time command filter is used The filter filters the virtual control signal to solve the "computational explosion" problem in the traditional backstepping method; under the condition that the state variables do not violate the constraint conditions, the power angle of the generator in the power system can reach the neighborhood near the expected value within a limited time , and all variables in the closed-loop system are bounded; considering the uncertainty of power system parameters and the possibility of external unknown interference during operation, the fuzzy logic system is used to model the unknown nonlinear part of the power system to improve the control Effect: Under the condition that the state variables do not violate the constraints, the power angle, speed and equivalent reactance of the generator are guaranteed to reach the neighborhood near the expected value within a limited time.

Description

technical field [0001] The invention relates to a finite time self-adaptive fuzzy tracking control method of a full-state constrained power system. Background technique [0002] With the continuous progress of society and national economy, people's demand for electric energy is increasing, and the requirements for electric energy quality are also constantly improving. With the rapid development of the power system, the scale continues to expand and the complexity continues to deepen. If the power system fails, it will cause huge losses. Therefore, the research on power system stability is of great significance. [0003] Flexible AC Transmission System (FACTS), as a new regulation and control method, can effectively improve the stability of the power system and the transmission capacity of the transmission line. Static var compensator (SVC) is a kind of FACTS device, which can quickly adjust reactive power by changing reactance, and can perform reactive power compensation ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/04
Inventor 李泽许王瑶崔国增郝万君
Owner SUZHOU UNIV OF SCI & TECH
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