摘要
针对双馈风电场(DFIG)与串补输电系统之间存在的次同步振荡(SSO)问题,结合振荡发生的交互特性,提出一种基于能量互补的次同步振荡宽频带抑制策略,并通过静止无功发生器实现。利用静止无功发生器的功率补偿特性设计可提取宽频带次同步信号的阻尼调制策略,从而适用于频率时变的次同步振荡抑制问题。时域仿真结果表明,所设计的抑制策略可根据线路中的次同步信号产生相应反相的次同步功率来补偿抵消次同步能量,从而阻断双馈风电场与串补线路之间的相互作用,实现次同步振荡的有效抑制。
In view of the sub⁃synchronous oscillation(SSO)problem between the doubly⁃fed induction gen⁃erator(DFIG)⁃based wind farm and the series⁃compensated transmission system with combination of inter⁃active feature due to oscillation,a kind of SSO wide⁃band suppression method strategy based on energy complementation combined with the interactive characteristics of oscillation is proposed and achieved by the static var generator.The power compensation characteristic design of the static var generator is used to design the damping modulation strategy of extracting the wide⁃band sub⁃synchronous signal so to suit the suppression of SSO with time⁃varying frequency.It is shown by the time domain simulation result that the designed suppression strategy can generate the corresponding inverting sub⁃synchronous power according to the sub⁃synchronous signal in the line to offset the sub⁃synchronous energy,thereby blocking the interaction between the DFIG⁃based wind farm and the series⁃compensated line and suppressing the SSO effectively.
作者
于弘洋
王英沛
胡韵婷
于敬帅
赵国亮
邓占锋
高本锋
YU Hongyang;WANG Yingpei;HU Yunting;YU Jingshuai;ZHAO Guoliang;DENG Zhanfeng;GAO Benfeng(State Key Laboratory of Advanced Transmission Technology,Global Electricity Interconnection Research Institute,Beijing 102200,China;State Grid Fujian Fuzhou Electric Power Co.,Ltd.,Fuzhou 350000,China;Department of Electrical Engineering,North China Electric Power University,Hebei Baoding 071003,China)
出处
《电力电容器与无功补偿》
北大核心
2020年第6期108-114,共7页
Power Capacitor & Reactive Power Compensation
基金
国家电网公司科技项目(GEIRI-DL-71-18-005)。
关键词
双馈风电场
串补输电系统
次同步振荡
能量互补
宽频带抑制
DFIG-basedwindfarm
series⁃compensatedtransmissionsystem
sub⁃synchronousoscillation
energycomplementation
wide⁃bandsuppression
