The Design Of Chen Jiagang 2×660MW Crew Excitation Regulator

Synchronous generator excitation control plays a particular important role in the stability operation of power system. With the increasing of unit capacity of generator and scale of power grid, higher requirements are made about reliability and dynamic quality of excitation control by generator set and electric power system. With control theory becoming better, excitation control technology gets great progresses constantly both in theory and in practice.In the study of the excitation system, the generator model adopted takes the approximation more or less. It will ignore some uncertainties, when this model is used, which makes the system less than optimal. Using the control method that does not accurately require the model to design the controller can compensate for this deficiency. Terminal sliding mode control is a method whose control law does not entirely depend on the mathematical model, and it is a nonlinear control method.In order to obtain better convergence rate, Terminal piecewise sliding mode excitation control is designed based on fast Terminal sliding mode surface. Sliding mode control strategy contains more parameters, to solve this problem, particle swarm optimization (PSO) is used to optimize the parameters for the preferable ability of searching. To solve the problem of uncertainty and unknown external disturbance exist in the excitation, a nonlinear disturbance observer is desgned, it can make the observation error exponential convergence by choosing appropriate design parameters. The stability of the closed-loop control system is verified by Lyapunov function designed.The simulation and analysis is done under a variety of disturbance based on single machine to infinite-bus system. The simulation results show that the response rate of the control strategy proposed in this paper is faster, it can also improve the static and transient stability of the power system effectively, and improve control precision.