When the power company is cutting and sending electricity, low frequency oscillation will occur in the power equipment at the harbor, which causes equipments to fail to function properly. This paper proposes an improved NSGA-II to coordinately control the power system, with the power system stabilizer and static reactive power compensator. The classical single machine system is simulated and analyzed in Matlab/Simulink software. The Strength Pareto Evolutionary Algorithm is selected to compare and analyze the different performance with the improved genetic algorithm which proposed in this paper. The results show that the PSS and SVC optimized by NSGA-II can improve the damping ratio of power system and restrain the low-frequency oscillation more effectively.

电力公司切断供电时，港口的电力设备会发生低频振荡，导致设备无法正常工作。本文提出了一种改进的NSGA-II，它具有电力系统稳定器和静态无功补偿器，可以对电力系统进行协调控制。经典的单机系统在Matlab / Simulink软件中进行了仿真和分析。选择强度帕累托进化算法，通过本文提出的改进遗传算法对不同性能进行比较和分析。结果表明，通过NSGA-II优化的PSS和SVC可以提高电力系统的阻尼比，更有效地抑制低频振荡。