基于差分进化机理优化的PID控制的AVR系统

在现代电力系统工程中,电力系统的动态稳定已成为目前一个极具挑战性的问题。同步发电动机励磁控制是加强电力系统稳性和保证电力质量的最重要的装置,但它的转子与其他部分之间的机电耦合会产生类似阻尼系统中出现的弹簧式的振荡现象。对此,提出一种基于差分进化机理优化的PID控制的自动电压调节系统。首先将多变异策略和优劣淘汰机制引入到差分进化算法中,然后由新的差分进化机理调节PID参数,从而实现由PID自适应地控制自动电压调节系统的目的。仿真结果表明了该调节系统的可行性,同时它比其他系统具有更好的动态响应性能。

PID controlled AVR system based on differential evolution mechanism optimization

The stability problem of dynamic stability of power system has a challenge in modern power system engineering. Synchronous generator excitation control is one of the most important measures to improve power system stability and to guarantee the quality of electrical power it provides. In a synchronous generator, the electrometrical coupling between the rotor and the rest of the system causes it to behave in a manner similar to a damper system. Therefore, we consider the problem of enhancing the stability of PID controlled automatic voltage regulator based on differential evolution mechanism optimization. Firstly, the multi-mutation strategies and worst one elimination system are integrated into differential evolution algorithm. Then parameters of PID are self-adjusted by using improved differential evolution mechanism, so as to realize self-tuning of automatic voltage regulator. The simulation results show that the proposed method can get better dynamic respond behavior than other conventional methods.