基于和声搜索算法的多机系统PSS参数协调优化

电力系统稳定器(PSS)是抑制低频振荡的重要装置。在多机电力系统中,PSS参数设计要满足两方面的要求:既要能够改善本机强相关振荡模式的阻尼,也要能够避免导致其余机组的阻尼明显恶化。在此背景下,以特征值分析法为基础,从发电机组的角度构造了反映其强相关模式阻尼情况的指标并建立了能够反应系统整体小干扰稳定水平和机组间阻尼分配情况的目标函数。采用了近年来发展的和声搜索(Harmony Search)这一高效启发式优化算法来求解这一优化问题。最后,根据实际工程需求设计和开发了相应的软件系统。对10机39节点新英格兰系统和64机305节点福建电力系统的PSS参数协调优化结果验证了所发展的模型与方法的可行性和有效性。

Harmony search based coordinated parameter tuning of power system stabilizers in multi-machine power systems

Power system stabilizers(PSSs) play an important role in suppressing low frequency oscillations.In multi-machine power systems,the objective of PSS parameter tuning should not only be to damp electromechanical modes related strongly to the pertained generator,but also to take the damp of other generators into account.Given this background,a new criterion from the perspective of generators is proposed based on the well-known eigenvalue analysis.An objective function reflecting the overall stability as well as the damp distribution among generators is developed.The Harmony Search(HS),an effective modern heuristic optimization algorithm developed in recent years,is employed for solving this constrained optimization problem.Finally,a software system is designed and implemented for applications to practical power systems.Two power systems,i.e.the New England 10-unit 39-bus system and the 64-unit 305-bus Fujian power system are served for demonstrating the feasibility and efficiency of the developed model and method.