双馈风电机组并网运行下谐波电流建模与特性分析  

The Modeling and Characteristic Analysis of Harmonic Current of DFIG Based Wind Turbine in Grid-connected Mode

作　　者：年珩[1] 周骐 吴超[1] 朱琼锋 NIAN Heng;ZHOU Qi;WU Chao;ZHU Qiongfeng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China;State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems(China Electric Power Research Institute),Haidian District,Beijing 100192,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市海淀区100192

出　　处：《中国电机工程学报》2019年第17期5037-5048,共12页Proceedings of the CSEE

基　　金：新能源与储能运行控制国家重点实验室开放基金(NYB51201801990)~~

摘　　要：在新能源发电并网容量日益增多、电网对新能源电站电能质量准确评估提出更高要求的背景下,该文建立考虑电网背景谐波和开关死区特性的双馈风电机组并网输出谐波电流解析模型,以准确描述并网电流的整次频率分量和非整次频率分量的幅值和相位信息。同时,深入分析电网背景谐波电压幅值相位、运行工况、控制延时等多种因素对谐波电流特性的影响机理。最后,通过仿真建模和实际风场检测等手段对所建谐波电流模型的准确性进行验证。With the increased renewable energy power capacity and increased requirement for power quality assessment of renewable power station,the mathematical model of harmonic current including the output from the stator winding and grid side converter of the doubly-fed induction generator based wind turbine was developed,in which the harmonic current caused the background harmonic components in the power grid and dead time effect of convertor were considered.Based on the harmonic current model,the amplitude-phase characteristic of integer frequency and non-integer frequency component in harmonic current could be accurately described.Also,the influence mechanism of different factors such as the amplitude and phase of harmonic voltage in grid,operation situation and control delay on the harmonic current were analyzed.Finally,the correctness of the harmonic current model was verified by the simulation results and experimental tests.

关 键 词：双馈风电机组 谐波电流 电网背景谐波 死区时间 

分 类 号：TM614[电气工程—电力系统及自动化]