能量变换器四机系统低频振荡控制方法研究  

Research on control method of low frequency oscillation for four powerformer system

作　　者：梁艳萍[1] 刘剑[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150040

出　　处：《电机与控制学报》2009年第2期168-172,共5页Electric Machines and Control

基　　金：国家自然科学基金(50577012)

摘　　要：能量变换器是一种新型的可以直接与电网相连的高压发电装置,针对其多机并网以及在并网后的低频振荡的重要问题研究的较少。为了进一步了解能量变换器的运行特性,采用多频带电力系统稳定控制器的控制方式,对四机互联的能量变换器进行系统建模,分析了在故障情况下,发生弱阻尼形式的低频振荡,给出了发生振荡后的转子转速变化规律,探讨了能量变换器阻尼绕组对多机系统的影响,仿真分析了多频段电力系统稳定器的对低频振荡的抑制效果,并给出了自并励励磁系统的参数和多频段电力系统稳定控制器的选择方法。仿真结果表明,多频带电力系统稳定器对弱阻尼方式的低频振荡的控制效果明显优于转速变化量的控制方式。Powerformer is a new style high voltage power equipment which can be connected to the power grid directly, however, there are few researches about several powerformer connected with the power grid, and the case is the same to the important problem of low frequency oscillation which occurred after they are connected with the power grid. In order to master the operation character of powerformer, a multi-band power system stabilizer （MB-PSS） method was introduced, system model with four inter-connected powerformer was established, low frequency oscillation which is caused by lacking damper in the fault situation is analyzed, the variation pattern of rotor speed is given, the effect of damper windings of powerformer is discussed, and the simulation about control effect of MB-PSS was analyzed. It is also important to elaborate on the method of choosing parameter for self and parallel excitation system and for MB-PSS. The simulation result indicates that multi-band PSS has obvious limiting effect for lacking damp model, and the control effects are better than the method of speed variation.

关 键 词：能量变换器 低频振荡 电力系统稳定控制器 多频带控制 

分 类 号：TM47[电气工程—电器]