SVC对双馈风电场次同步振荡影响及抑制策略  

Impact of SVC on Sub-synchronous Oscillation of DFIG-based Wind Farms and Suppression Strategy

作　　者：方力[1] 潘学萍[1] 鞠平[1] FANG Li;PAN Xueping;JU Ping(College of Energy and Electrical Engineering,Hohai University,Nanjing,Jiangsu 211100,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《广东电力》2019年第3期52-58,共7页Guangdong Electric Power

基　　金：国家自然科学基金重点资助项目(51837004);111引智计划资助项目(B14022)

摘　　要：针对静止无功补偿器(static var compensator,SVC)对双馈风电场次同步振荡(sub-synchronous oscillation,SSO)影响的问题,设计了抑制振荡策略。首先从阻尼转矩出发,分析SVC对双馈风电场SSO的抑制机理并设计抑制风电场SSO的附加阻尼器控制策略;其次基于PSCAD/EMTDC平台,仿真分析SVC控制方式、并网位置以及容量对双馈风电场SSO的影响;最后采用遗传算法对附加阻尼器控制参数进行优化。算例结果表明所设计的附加阻尼器控制,既能满足SVC在正常时维持电压水平的作用,还能在发生SSO时对其进行有效抑制。Aiming at the problem of impact of static var compensator (SVC) on sub-synchronous oscillation (SSO) of doubly fed wind generator (DFIG) based wind farms, this paper designs a kind of suppression strategy. In terms of damping torque, it firstly analyzes suppression mechanism of SVC on SSO of the DFIG-based wind farm and designs an auxiliary damper control strategy. Secondly, on the basis of PSCAD/EMTDC platform, it analyzes SVC control mode, grid-connection location and effect of capacity on SSO of the DFIG-based wind farm by simulation. Finally, it adopts the genetic algorithm for optimization on control parameters of the auxiliary damper. The example result indicates that the designed auxiliary damper control mode can not only keep voltage level as SVC is under the normal condition, but also suppress SSO effectively.

关 键 词：双馈风电场 次同步振荡 静止无功补偿器 附加阻尼器控制 

分 类 号：TM744[电气工程—电力系统及自动化]