孤岛微电网中二阶滤波器与PID控制器一体化参数整定方法

Integrated Parameter Setting of Second Order Filter and PID Controller for Isolated Island Microgrid

摘要:

在孤岛微电网系统中,为降低测量噪声影响从而引入二阶滤波器。然而二阶滤波器的引入,通常使原系统PID控制器的最优参数发生改变,从而导致控制系统性能指标下降。为解决此问题,提出了一种一体化参数整定方法。该方法利用混合粒子群算法,以不同参数下,系统性能指标在Topsis综合评价法中的高得分作为寻优目标,一体化整定PID控制器与二阶滤波器的参数,保证滤波器的引入不会对系统性能指标造成较大改变,从而提升控制器性能。通过孤岛微电网系统仿真实验,验证了该方法的可行性与有效性。

Abstract:

In the isolated island microgrid system, a second-order filter is introduced to reduce the impact of measurement noise. However, the introduction of the second-order filter usually changes the optimal parameters of the original PID controller, which leads to the decline of the performance index of the control system. To solve this problem, this paper proposes an integrated parameter setting method. In this method, the hybrid particle swarm optimization algorithm is used to optimize the high score of system performance index in Topsis comprehensive evaluation method under different parameters, and the parameters of PID controller and second-order filter are integrated to ensure that the introduction of filter will not cause great changes to system performance index, so as to improve the controller performance. The feasibility and effectiveness of the proposed method are verified by the simulation experiment of isolated island microgrid system.