Linkage Control Strategy of Energy-Storage Dual-Feed Wind Unit and SVG Reactive Voltage

doi:10.3969/j.issn.1008-0198.2022.03.008

Abstract

Abstract: This paper aims at the problem that the traditional linkage control of doubly fed fan is difficult to realize voltage support due to the voltage fluctuation of parallel network of doubly fed fan. A reactive power linkage control strategy of energy storage doubly fed induction generator (DFIG) and static var generator (SVG) is proposed. According to the reactive power demand in case of voltage drop at the parallel node, the energy storage DFIG is linked with SVG to carry out reactive power compensation by stages. In the first stage, the reactive power support is completed by the unit itself, the grid side converter is converted from the unit power factor mode to the reactive power compensation mode and the remaining reactive power deficiency is put into SVG to assist the unit in reactive power compensation.In the second level, the reactive power capacity allocated to the wind turbine is distributed to each unit one by one, according to the real-time regulation range of reactive power of each unit. When the voltage drop of the parallel node is greater than 30%, it is necessary to consider putting the super capacitor into operation to ensure the normal operation of the unit. The simulation results show that the strategy can suppress 15% voltage drop when the voltage drop is 30%; 98% reactive power and voltage support can be realized within 2 seconds, which can quickly and effectively improve the low-voltage ride through capability of doubly fed wind farm.

Key words: DFIG, SVG, linkage control, reactive power, reactive voltage

CLC Number:

LI Shengqing, WEN Yanxi, ZHENG Jian, ZHU Guangming, CHEN Xin. Linkage Control Strategy of Energy-Storage Dual-Feed Wind Unit and SVG Reactive Voltage[J]. Hunan Electric Power, 2022, 42(3): 43-48.

References

[1] 周明,葛江北,郭飞,等.改善连锁脱网的风电场群电压无功紧急控制策略[J].电力系统自动化,2016,40(5): 71-77.
[2] 于淼,谢欢,宋玮,等. 风电汇集地区SVC控制方式对电压异常振荡影响因素分析[J].电力系统自动化,2017,41(1): 73-78.
[3] 郭成,贯坤,郭育华. SVG对直驱式机组风电场无功补偿的研究[J].电力电容器与无功补偿,2017,38(3): 67-70.
[4] 王松,李庚银,周明. 双馈风力发电机组无功调节机理及无功控制策略[J].中国电机工程学报,2014,34(16): 2714-2720.
[5] Mullane A ,Lightbody G ,Yacamini R . Wind-turbine fault ride-through enhancement[J]. IEEE Transactions on Power Systems, 2005, 20(4): 1929-1937.
[6] De Almeida R G ,Lopes J A P ,Barreiros J A L . Improving Power System Dynamic Behavior Through Doubly Fed Induction Machines Controlled by Static Converter Using Fuzzy Control[J]. IEEE Transactions on Power Systems, 2004, 19(4): 1942-1950.
[7] 唐浩,郑涛,黄少锋,等. 考虑Chopper 动作的双馈风电机组三相短路电流分析[J].电力系统自动化,2015, 39(3) : 76-83.
[8] 王成福,梁军,张利,等.基于静止同步补偿器的风电场无功电压控制策略[J].中国电机工程学报,2010,30(25): 23-28.
[9] 崔挺,胡果莉,呙虎,等.500 kV并网静止无功补偿器的无功电压支撑能力及处置方案[J].湖南电力,2021,41(4): 18-22.
[10] 任永峰,彭伟,刘海涛,等. 基于钒电池-超级电容混合储能技术的永磁同步风电机组低电压穿越能力提升研究[J].电网技术,2014,38(11): 3016-3023.
[11] 崔挺,沈阳武,张斌,等.300 MVar级同步调相机对湖南电网稳定的影响研究[J].湖南电力,2016,36(3): 1-4,8.
[12] 高林,成龙,张聪,等.考虑SVC和储能接入电网的多目标协同经济调度[J].湖南电力,2021,41(2): 1-8,14.
[13] 张俊武,王德林,刘柳,等. 基于变参数PI 控制的双馈风电机组频率控制策略[J].电工电能新技术,2018,37 ( 12) : 9-17.
[14] 余斌,朱维钧,徐浩,等.电池储能电站电池管理系统关键技术[J].湖南电力,2020,40(5): 55-59.
[15] 李军,胡斌奇,杨俊,等.湖南电网侧电池储能电站概况及调控运行启示[J].湖南电力,2020,40(1): 73-78.
[16] 杨蕾,周宗仁,郭成,等.SVG协同风电场的电网电压稳定控制策略研究[J].电工电能新技术,2020,39(10): 55-64.
[17] 崔森,颜湘武,李锐博.提高双馈风电机组动态无功协调控制能力的实验研究[J/OL].电力系统保护与控制:1-13[2021-10-24].doi:19783/j.cnki.psp.210722.
[18] 赵晶晶,胡晓光,吕雪,等.含STATCOM 的双馈电机风电场无功电压协调控制策略[J].电工电能新技术,2016,35(10) :17-22.
[19] Chompoo-inwai C,Yingvivatanapong C,Methaprayoon K.Reactive compensation techniques to imporove the ride through capability of wind turbine during disturbance[J].IEEE Trans. on Industry Applications,2005,41(3): 666-672.
[20] 邹赟,王维庆,王海云.基于SVG的双馈风电场电压稳定控制策略研究[J].电机与控制应用,2018,45(7): 116-121.
[21] 郭成,贯坤,郭育华.SVG对直驱式机组风电场无功补偿的研究[J].电力电容器与无功补偿,2017,38(3): 67-70,77.
[22] 王玉婷,李鹏.大规模风电并网无功电压协调控制策略研究[J].电工电能新技术,2019,38 ( 3) :47-55.
[23] 崔杨,彭龙,仲悟之,等.双馈型风电场群无功分层协调控制策略[J].中国电机工程学报,2015,35(17): 4300-4307.