直驱型风电并网系统建模及关键参数变化影响研究  

Research on Modelling of Direct-drive Wind Power Integration System and Influence of Key Parameters Change

作　　者：王丹[1] 刘崇茹[1] 李庚银[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2015年第6期78-83,100,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金重大项目(51190103);高等学校学科创新引智计划("111"计划)(B08013)

摘　　要：以直驱永磁同步风力发电机为研究对象,分别建立了风力机、永磁同步发电机、换流器等环节的数学模型,并采用加权等值的方法对多台直驱型风电机组进行了等值。在并网系统的控制方面,基于矢量控制方法设计并实现了风机系统背靠背换流环节以及基于电压源换流器的高压直流输电(Voltage source converter based HVDC,VSC-HVDC)并网环节的控制策略,并从理论上分析了受端换流器的直流电压控制参数及受端所联电网强度对系统动态特性的影响。最后,通过PSCAD/EMTDC电磁暂态仿真软件对直驱型风电并网系统的运行特性进行了仿真分析,重点研究了风电系统接入不同强度的受端电网及并网侧换流器关键控制参数的不同取值对直驱型风电并网系统动态特性的影响,仿真结果验证了理论分析结果的正确性和合理性。Taken direct-driven permanent magnet synchronous wind power generator（ PMSG） as the research subject,this paper establishes the mathematical models of wind turbine,permanent magnet synchronous generator and converters. According to the weighted equivalent method,the equivalent model of multi-PMSGs is also built. In the aspect of wind power integration system control strategy,this paper designs and realizes the control strategies of PMSG wind power system back-to-back converters and VSC-HVDC converters based on vector control scheme. Then the effects on the dynamic characteristics of the whole system are theoretically analyzed,which are caused by the key control parameters of the grid-side DC voltage controller and the strength of receiving-end ac system. Finally,based on the PSCAD / EMTDC simulation software,this paper analyzes the operational characteristics of PMSG integration system and dissects the impacts of receiving-end power grid＇s strength and grid-side control parameters on the dynamic characteristics of PMSG wind power integration system. The simulation results justify the validity and rationality of the theoretically analytical results.

关 键 词：直驱型风电并网 永磁同步风力发电机 等值建模 矢量控制 动态特性 

分 类 号：TM614[电气工程—电力系统及自动化]