考虑DFIG参与系统调频的动态潮流模型研究  

DYNAMIC POWER FLOW MODEL CONSIDERING DFIGS PARTICIPATING IN FREQUENCY REGULATION

作　　者：李生虎[1] 张维[1] 董王朝 唐彩林 Li Shenghu;Zhang Wei;Dong Wangchao;Tang Cailin(School of Electrical Engineering and its Automation,Hefei University of Technology,Hefei 230009,Chin)

机构地区：[1]合肥工业大学电气与自动化工程学院

出　　处：《太阳能学报》2018年第7期2052-2059,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51277049;51637004)

摘　　要：针对双馈感应风电机组（DFIG）,基于超速和变桨距策略及下垂控制原理,量化机组惯性,根据频率变化修正机组相关参数,引入DFIG内部约束量化机组内部损耗,提出考虑DFIG参与系统一次调频的动态潮流模型。结合算例分析,发现DFIG惯性受风速和减载水平影响;减载水平一定时,风速越大,DFIG参与一次调频时间越长,对系统频率支持能力越强。With the increased capacity of wind power integration,wind turbines replace synchronous generators（SGs）partially and participate in frequency regulation.The dynamic power flow distributes the unbalanced power to generators,and quantifies the change of system frequency.The existing literatures focus on the SG,and do not consider the windturbine generators.This paper studies the doubly-fed induction generators（DFIGs）participating in primary frequencyregulation and quantifies the inertia base on overspeed and pitch angle control and droop control,where the capturedpower,rotate speed,and slip are decided by frequency change.The constraints of the DFIG and the power system aresolved together to quantify the output power.The dynamic power flow model considering DFIGs participating in primaryfrequency regulation is proposed.The numerical results show that inertia of the DFIG is decided by the wind speed andthe deloading level.With the deloading level fixed,the higher wind speed yields the longer time and more effectivefrequency support ability.

关 键 词：风电 频率响应 潮流 双馈风电机组 一次调频 动态潮流 

分 类 号：TM614[电气工程—电力系统及自动化]