带时延补偿的模糊广域阻尼控制分析与设计

研究了存在网络通信时延的电力系统的广域阻尼控制问题。首先从理想传输情况出发,设计基于Mamdani方法的模糊逻辑广域阻尼控制器;然后考虑时延对控制效果的影响,在控制器中引入模糊输入,设计带时延补偿的模糊逻辑广域阻尼控制器。时延补偿增加了控制器设计的复杂性,因此在保证系统性能无显著降低的条件下,对其模糊规则数进行简化。以4机2区域测试系统为例,利用Matlab/SimPowerSystem和TrueTime进行仿真分析,结果表明,与模糊逻辑广域阻尼控制器和传统的广域阻尼控制器相比,所设计的具有时延补偿的模糊逻辑广域阻尼控制器能有效地抑制时延对系统稳定性造成的影响。

Fuzzy logic wide-area damping control with delay compensation for power system

The wide-area damping control with network communication time delay is investigated. Firstly, a fuzzy logic wide-area damping controller (FLWADC) based on the Mamdani model is designed without considering time delay. Then, a delay-compensated input is introduced to design an FLWADC with delay compensation (FLWADC-DC) in order to alleviate the effect of time delay on system performance. Delay compensation makes controller design complicated. Therefore, on the premise that the performance of the system is not undermined conspicuously, the fuzzy rules are decreased. Case studies based on four-machine two-area power system are carried out in Matlab/SimPowerSystem and TrueTime toolbox, and simulation results illustrate that the FLWADC-DC controller performs better than the FLWADC controller and the conventional WADC in time delay environments.