沈阳武,梁利清,张斌,刘嘉彦,李勇

• 1:国网湖南省电力有限公司电力科学研究院
• 2:湖南大学电气与信息工程学院

摘要(Abstract)：

风电的间歇性与随机性会导致风电场电压波动,威胁风电场安全稳定运行。传统无功下垂控制方式忽略了风电场内部无功传输造成的功率损耗。本文针对风电场内部电压稳定问题,提出了一种基于改进灵敏度算法的风电场下垂优化分层控制策略。综合考虑了风机和无功补偿设备之间的相互协调,通过改进灵敏度算法得到电压边界,以网损最小为优化目标,各个风机和无功补偿设备的下垂增益系数为变量进行优化运算,为每台风机和无功补偿设备计算出最优情况的下垂增益系数。研究结果表明,该方法可在维持电压稳定的同时有效降低风电场线路损耗,有效提升风电系统的电压稳定性和经济效率。

关键词(KeyWords)： 风电场;无功优化;下垂控制;灵敏度计算;分层控制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51822702)

作者(Author): 沈阳武,梁利清,张斌,刘嘉彦,李勇

DOI: 10.19635/j.cnki.csu-epsa.000403

参考文献(References)：

• [1]杨硕，王伟胜，刘纯，等（Yang Shuo,Wang Weisheng,Liu Chun,et al）.双馈风电场无功电压协调控制策略（Coordinative control strategy for reactive power and voltage of wind farms with doubly-fed induction generators)[J].电力系统自动化（Automation of Electric Power Systems),2013,37(12):1-6.
• [2]Zhao Haoran,Wu Qiuwei,Guo Qinglai,et al.Coordinated voltage control of a wind farm based on model predictive control[J].IEEE Trans on Sustainable Energy,2016,7(4):1440-1451.
• [3]黄松柏（Huang Songbai）.考虑风电机无功调节能力的配电网有功/无功联合调度（Coordinated active/reactive power dispatch considering reactive-power regulation capability of wind turbine for distribution network)[J].电力自动化设备（Electric Power Automation Equipment),2017,37(2):44-49.
• [4]Neumann T,Feltes C,Erlich I.Response of DFG-based wind farms operating on weak grids to voltage sags[C]//IEEE Power and Energy Society General Meeting.Detroit,USA,2011.
• [5]GB/T 19963-2011风电场接入电力系统技术规定[S].
• [6]EON Gmbh-2006 Grid Code:High and extra high voltage[S].
• [7]Wu Qiuwei,Xu Zhao，?stergaard J.Grid integration issues for large scale wind power plants(WPPs)[C]//IEEEPower and Energy Society General Meeting.Minneapolis,USA,2010.
• [8]王松，李庚银，周明（Wang Song,Li Gengyin,Zhou Ming）.双馈风力发电机组无功调节机理及无功控制策略（The reactive power adjusting mechanism&control strategy of doubly fed induction generator)[J].中国电机工程学报（Proceedings of the CSEE),2014,34(16):2714-2720.
• [9]Karthikeya B R,Schutt R J.Overview of wind park control strategies[J].IEEE Trans on Sustainable Energy,2014,5(2):416-422.
• [10]崔杨，彭龙，仲悟之，等（Cui Yang,Peng Long,Zhong Wuzhi,et al）.双馈型风电场群无功分层协调控制策略（Coordination strategy of reactive power control on wind farms based doubly fed induction generator)[J].中国电机工程学报（Proceedings of the CSEE),2015,35(17):4300-4307.
• [11]栗然，唐凡，刘英培，等（Li Ran,Tang Fan,Liu Yingpei,et al）.双馈风电场新型无功补偿与电压控制方案（Anew scheme of reactive power compensation and voltage control for DFIG based wind farm)[J].中国电机工程学报（Proceedings of the CSEE),2012,32(19):16-23.
• [12]赵亮，吕剑虹（Zhao Liang,LüJianhong）.基于改进遗传算法的风电场多目标无功优化（Multi-objective reactive power optimization of wind farm based on improved genetic algorithm)[J].电力自动化设备（Electric Power Automation Equipment),2010,30(10):84-88.
• [13]Wang Tao,Nian Heng,Zhu Z Q,et al.Flexible compensation strategy for voltage source converter under unbalanced and harmonic condition based on a hybrid virtual impedance method[J].IEEE Trans on Power Electronics,2018,33(9):7656-7673.
• [14]Khatod D K,Pant V,Sharma J.A novel approach for sensitivity calculations in the radial distribution system[J].IEEE Trans on Power Delivery,2006,21(4):2048-2057.
• [15]Haque M H.A general load flow method for distribution systems[J].Electric Power Systems Research,2000,54(1):47-54.
• [16]Christakou K,Le Boudec J,Paolone M,et al.Efficient computation of sensitivity coefficients of node voltages and line currents in unbalanced radial electrical distribution networks[J].IEEE Trans on Smart Grid,2013,4(2):741-750.
• [17]Li Yujun,Xu Zhao,Zhang Jianliang,et al.Variable droop voltage control for wind farm[J].IEEE Trans on Sustainable Energy,2018,9(1):491-493.
• [18]郎永强，张学广，徐殿国，等（Lang Yongqiang,Zhang Xueguang,Xu Dianguo,et al）.双馈电机风电场无功功率分析及控制策略（Reactive power analysis and control of doubly fed induction generator wind farm)[J].中国电机工程学报（Proceedings of the CSEE),2007,27(9):77-82.
• [19]李桂丹，王佳琦，靳新悦，等（Li Guidan,Wang Jiaqi,Jin Xinyue,et al）.风电场内部无功分配优化策略（Optimization strategy of reactive power dispatch in wind farm)[J].电力系统及其自动化学报（Proceedings of the CSU-EPSA),2018,31(7):123-128.