摘要
风能作为可再生型和环境友好型能源,风力发电技术已经迅速在全世界范围内到了发展。随着风电的快速发展,大型风电场并网安全问题也越来越受到关注。主要针对由变速恒频风电机组组成的大型风电场,研究其并入在含有串联补偿线路的电网后,在严重电网故障情况下机网扭振情况。扭振现象对于风电机组的零部件和电网安全稳定运行构成严重的威胁。建立建立风力机的四质量块模型和感应发电机数学模型,采用等值机形式,构建了9 MW的大型风电场。首先验证了在三相短路故障情况下,大型并网风电场中存在机网扭振现象。然后,通过改进传统的串联补偿环节,提出了利用晶闸管控制的可控串联补偿装器(TCSC)对机网扭振进行抑制。利用Matlab软件仿真进行实时仿真,并且进行了频谱分析,结果验证了可控串联补偿器可以减少机网扭振。
Wind energy as a renewable and environment friendly resource of energy, wind power technology has been rapidly growing all over the world.With the rapid development of wind power ,the grid-connected security problem of large-scale wind farm is becoming more and more attention.The paper mainly aimed at large-scale wind farm consisted of the variable speed and constant frequency wind turbines,studied that after it was connected the grid of series compented lines,the situ- ation of torsional vibration in serious network fault.The phe- nomenon of torsional vibration caused a serious threat to wind turbine components and the safe and stable operation of grid.In this paper,four-mass model and induction generator mathermati- cal model were built,then using the form of equivalent genera- tors constructed the large-scale farm of 9MW.First of all,the pa- per verified that the phenomenon of torsional vibration exist in the large-scale connected wind farm under the condition of three-phase short-circuit fault.Then,through improving the tradi- tional series compensation,thyristor controlled series capacitor was proposed to mitigate the torsional vibration.The software of Matlab was used to do the real-time simulation and the frequen- cy spectrum analysis was carried out.At last,Results verified the thyristor controlled series capacitor that can reduce the torsional vibration.
出处
《电力学报》
2014年第5期371-377,共7页
Journal of Electric Power
基金
国家自然科学基金资助项目(50807036)
上海市教育委员会科研创新项目资助(10YZ217)~~
关键词
大型风电场
四质量块模型
机网扭振
可控制串联补偿器
large-scale wind farm
four-mass model
torsional vibration
thyristor controlled series capacitors
作者简介
徐祥平（1990-），男，硕士研究生，研究方向为电力系统FACTS研究和电力系统仿真，1270169734@qq．com；
张延迟（1967-），男，博士，副教授，研究方向为并网型风力发电机和电力系统仿真。
