Multi-machine infinite power system dynamic area division sliding mode controller with SVC

Abstract

The invention discloses a multi-machine infinite power system dynamic area division sliding mode controller with SVC. The implementation of the controller comprises the following steps: 1) modeling for a multi-machine infinite power system with SVC; 2) under a condition that an actuator fails, establishing a multi-machine system model containing a failure fault; 3) adopting an RBF neural network to approach an unknown function in the system model; and 4) combining a dynamic surface controller design method with an integral sliding mode, and designing the self-adaptive controller of the multi-machine power system with the SVC. In the invention, on the basis of parameter uncertainty and external disturbance of a multi-machine power system, a failure fault condition of the actuator is considered; and an adaptive fault-tolerant control method is adopted to finally form a dynamic area division sliding mode coordination controller of SVC and generator excitation, convergence of a state tracking error to zero in finite time is realized, an anti-interference capability, a convergence speed and tracking precision of the system are improved, and all signals of the whole control system are ensured to be semi-globally consistent and finally bounded.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a multi-machine infinite power system dynamic area integral sliding mode controller with SVC. Background technique [0002] Modern power systems have the characteristics of large power grids, large units, long-distance power transmission, and highly automatic control, which pose great challenges to the stable operation of power systems. Generator excitation control plays an important role in improving the stable operation of power systems. In the actual power grid operation, the system is more complicated and cannot be simply equated with a single-machine system, and the interaction between multiple generators needs to be considered. A generator failure may affect the operation status of other generators, thus affecting the stable operation of the entire power system. Therefore, the design of multi-machine excitation controller becomes the focus of research. Static var comp...

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Problems solved by technology

The feedback linearization control method is highly sensitive to parameter changes; the inversion control method has a "differential explosion" problem, which makes the control more complicated

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