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Input quantization finite time fault-tolerant anti-interference control method for multi-machine power system

An electromechanical system, finite time technology, applied in the field of input quantization finite time fault-tolerant anti-interference control of multi-machine power system, can solve problems such as system uncertainty, jitter, system instability, etc.

Active Publication Date: 2020-08-21
NANJING NORMAL UNIVERSITY
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Problems solved by technology

Combined with quantized control technology, the finite-time FTC input signal is transformed into a discrete set of constants, but this may lead to a special class of system uncertainty and may make the system unstable or jittery

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  • Input quantization finite time fault-tolerant anti-interference control method for multi-machine power system
  • Input quantization finite time fault-tolerant anti-interference control method for multi-machine power system
  • Input quantization finite time fault-tolerant anti-interference control method for multi-machine power system

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Embodiment Construction

[0060] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] An input quantized nonlinear system fault-tolerant adaptive control method of the present invention includes the following content:

[0062] 1. Mathematical model of multi-machine power system;

[0063] The control problem of multi-machine electric power is a valuable research topic. Generator G in the area 1 and G 2 and G 3 and G 4 The electrical connection is close, and the dynamic behavior is similar after being disturbed, so we can treat each area as a generator, such as figure 2 shown. When designing the controller, the following assumptions are made: the generator uses a hidden pole machine, and the model uses a classical second-order model; the generator uses a transient reactance to make the transient potential E 1 and E 2 Constant; input mechanical power P m1 and P m2 Constant; considering...

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Abstract

The invention discloses an input quantization finite time fault-tolerant anti-interference control (FTC) method for a multi-machine power system. The method comprises the following steps of: 1, establishing a more general nonlinear system with quantization input based on a mathematical model of the multi-machine power system; 2, proposing a hysteresis quantizer to quantize an input signal so as toreduce jitter; and 3, designing an adaptive controller and analyzing the stability of the adaptive controller. The effectiveness of the control method provided by the invention is verified by carrying out simulation research on a two-region four-machine power system containing a thyristor control series capacitance compensation technology (TCSC). Compared with the prior art, the invention provides a new self-adaptive control scheme by introducing a new quantitative control scheme and a novel fault-tolerant control method for uncertain actuator faults. The self-adaptive controller designed bythe invention can ensure the finite time global stability of the closed-loop system.

Description

technical field [0001] The invention relates to an automatic control method, in particular to an input quantization limited time fault-tolerant anti-interference control method of a multi-machine power system. Background technique [0002] The input quantified finite time fault-tolerant control of multi-machine power system is a control technology that can eliminate the impact of faults on the power system and recover to a reasonable performance index in a limited time when the input is quantized. The traditional power system stabilizers are designed based on the linear model of the power system, but in order to preserve the nonlinear characteristics of the power system, attention has been paid to the nonlinear control of the power system. The problem of finite-time control of nonlinear systems has been widely concerned. Literature "H.Du, J.Zhai, M.Z.Q.Chen, and W.Zhu. Robustness analysis of a continuous higher-order finite-time control system under sampled-data control. IE...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 刘文慧金璇刘国宝齐晓静孟波
Owner NANJING NORMAL UNIVERSITY
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