SVC电压稳定控制和抑制低频振荡交互影响研究  

Interaction Study of SVC Voltage Stability Control and Inhibiting of Low frequency Oscillation

作　　者：王云洁[1] 胡弢[2] 

机构地区：[1]东南大学电气工程学院,江苏南京210096 [2]盐城供电公司,江苏盐城224005

出　　处：《江苏电机工程》2013年第1期23-25,29,共4页Jiangsu Electrical Engineering

摘　　要：静止无功补偿器(SVC)可以提供电压支持,提高系统电压稳定性,其附加阻尼控制又可以改善系统的阻尼状态,抑制低频振荡,这2种功能之间可能存在一定的相互作用。理论分析了单机无穷大系统中SVC的电压控制与阻尼控制的相互作用,研究表明SVC的阻尼控制与电压控制存在矛盾,增强系统阻尼振荡的能力将会牺牲电压品质。在二区域四机系统中进行仿真,验证了SVC加入附加控制器后有效提高系统阻尼比,但电压稳定性变差,此结果与理论分析相一致。Static Var Compensator （SVC） can provide voltage support and improve voltage stability of power system. The additional damping control of SVC can improve the system＇s damping state to inhibit low-frequency oscillation. But there may be certain interaction between the two functions. The interaction between SVC voltage stability control and inhibiting of low-frequency oscillation in the one machine - infinity bus system is studied theoretically in this paper. Research shows that contradiction exist between SVC damping control and voltage control, enhance the system damping oscillation ability will sacrifice voltage quality. At last, a simulation using two-area four-machine system as an example, which verifies the SVC can effectively improve the voltage stability, adding additional controllers to effectively improve the system damping ratio, but the voltage stability becomes worse. The results and the theoretical analysis are consistent.

关 键 词：SVC 电压稳定性 低频振荡 交互影响 

分 类 号：TM761[电气工程—电力系统及自动化]