摘要
以绝缘栅双极晶闸管(IGBT)和脉宽调制(PWM)控制为基础的新型静止无功补偿装置(SVC Light),可快速调节其与交流系统间交换的感性或容性无功功率,具有提高振荡阻尼特性的能力。介绍SVC Light的工作原理,推导出三相abc坐标系下的数学模型,建立基于受控电压源和受控电流源的等效仿真模型,并设计出基于比例-积分调节器的直流电压、无功功率和交流母线电压控制器。利用复转矩系数的时域实现方法——测试信号法,分析SVC Light不同控制方式、主电路参数以及控制器参数对发电机电气阻尼特性的影响。研究结果表明,SVC Light在配置次同步附加阻尼控制器后,通过动态调节其与交流系统间交换的无功功率,可以显著增加发电机电气阻尼,有效抑制由串联电容补偿引发的发电机轴系振荡。
Based on the insulated gate bipolar transistor （IGBT） and pulse width modulation （ PWM ） technology, the SVC Light as a new style of static vat compensators has the capability of controlling its output reactive power rapidly. In this paper, the mathematical model of a SVC Light in abc coordinate was established and the PI controller was designed. By using of test signal method, the influence of control modes, parameters of the primary device and controller on generator＇ s electrical damping were investigated. Simulation results show that the SVC Light equipped with the subsynchronous damping controller （ SSDC ） can improve generator＇ s electrical damping characteristics and suppress the subsynchronous oscillation effectively.
出处
《中国电力》
CSCD
北大核心
2010年第8期34-39,共6页
Electric Power
关键词
新型静止无功补偿器
次同步振荡
测试信号法
light static var compensator
subsynchronous oscillation
test signal method
