风电并网前后的系统短路故障特性分析与仿真  

Research on the Influence of Wind Power Integration by Matlab for System Dynamic Stability

作　　者：曾丽琼[1] 匡洪海[1] 张曙云[1] 邱雨阳 ZENG Li-qiong;KUANG Hong-hai;ZHANG Shu-yun;QIU Yu-yang(College of Electrical and Information, Hunan University of Technology, Hunan Zhuzhou 412000, China;Wuqiangxi Hydropower Plant, Wuling Power Co., Ltd. , Hunan Huaihua 419600, China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412000 [2]五凌电力有限公司五强溪水电厂,湖南怀化419600

出　　处：《新型工业化》2016年第4期27-33,共7页The Journal of New Industrialization

基　　金：湖南省自科基金项目(2015JJ5009);湖南省教育厅科研项目(15C0395);湖南工业大学研究生校级创新基金(CX1502)

摘　　要：由于风力发电出力的不稳定性从而导致风电并网将对系统原有的运行控制方式产生了一系列的挑战,为了更清晰直观了解到风电并网后对系统运行所产生的各方面影响。本文首先对目前主流风机类型双馈感应发电机组原理进行分析,同时采用直接并网模式构建了双馈感应风力发电机组并网前后系统发生三相短路故障的Matlab/Simulink仿真模型,并运用FFT分析并网前后三相短路故障特性,观察风电并网对系统动态稳定性的影响。仿真结果表明风力发电机组并入系统后比未并入时,系统发生短路故障所引起系统电压电流出现短时震荡更大、谐波畸变率更高,同时电压出现闪变现象也更加明显。Due to the instability of wind power output from the cause of grid connected wind power will be the original ofthe operation of the system control mode produces a series of challenges, in order to be more clear and intuitive understandingto grid connected wind power for the operation of the system arising from various aspects of the impact. Firstly the currentmainstream fan type doubly fed induction generator principle analysis, while using direct grid connected mode construct a threephaseshort circuit fault of MATLAB / Simulink simulation model of grid connected doubly fed induction generator wind turbineand the system, and the use of the FFT analysis before and after the grid connected three-phase short circuit fault characteristics,to observe the impact of wind power integration on power system dynamic stability. Simulation results show that incorporatedinto the wind turbine system than not incorporated, short circuit fault caused by system voltage and current short-term shocksgreater, harmonic distortion rate higher. At the same time, voltage flicker phenomenon is more obvious.

关 键 词：风力发电 双馈感应发电机 系统动态稳定性 谐波畸变率 

分 类 号：TM727.2[电气工程—电力系统及自动化]