含大型光伏电站的动态安全域
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摘要
从域的角度研究大型光伏电站对电力系统暂态稳定性的影响,用等容量的光伏电站替换常规发电机,计算含大型光伏电站的动态安全域(LPV-DSR)。通过对典型电力系统的大量仿真发现LPV-DSR边界仍可以用超平面拟合。通过与接入光伏电站前系统的DSR进行比较,得出3条经验规律:LVP-DSR边界与接入光伏电站前系统的DSR边界近似平行;从利于系统暂态稳定性的角度看,光伏电站换流器的最佳控制策略为定有功功率控制和定交流电压控制;同一种控制策略下,DSR范围随着接入系统光伏容量的增大而单调变化。
The influence of large-scale photovoltaic plant on transient stability of power system is researched from the perspective of domain,and the conventional generator is replaced by the photovoltaic plant with equal capacity to calculate the LPV-DSR(Dynamic Security Region with Large-scale PhotoVoltaic plant). Extensive simulations of typical power system show that the boundary of LPV-DSR can still be fitted by hyperplane. Three conclusions are obtained by the comparison with DSR of the system before the connection of photovoltaic plant: the boundary of LPVDSR is approximately parallel to the DSR boundary of the system before the photovoltaic plant connected; from the perspective of system transient stability,the optimal control strategy of photovoltaic converter is constant active power control and constant AC voltage control; the DSR range changes monotonously with the increase of grid-connected photovoltaic capacity under the same control strategy.
The influence of large-scale photovoltaic plant on transient stability of power system is researched from the perspective of domain,and the conventional generator is replaced by the photovoltaic plant with equal capacity to calculate the LPV-DSR(Dynamic Security Region with Large-scale PhotoVoltaic plant). Extensive simulations of typical power system show that the boundary of LPV-DSR can still be fitted by hyperplane. Three conclusions are obtained by the comparison with DSR of the system before the connection of photovoltaic plant: the boundary of LPVDSR is approximately parallel to the DSR boundary of the system before the photovoltaic plant connected; from the perspective of system transient stability,the optimal control strategy of photovoltaic converter is constant active power control and constant AC voltage control; the DSR range changes monotonously with the increase of grid-connected photovoltaic capacity under the same control strategy.
引文
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[2]贾科,顾晨杰,毕天姝,等.大型光伏电站汇集系统的故障特性及其线路保护[J].电工技术学报,2017,32(9):189-198.JIA Ke,GU Chenjie,BI Tianshu,et al. Fault characteristics and line protection within the collection system of a large-scale photovoltaic power plant[J]. Transactions of China Electrotechnical Society,2017,32(9):189-198.
[3]罗伯特.世界最大单体光伏电站在宁夏盐池建设[EB/OL].(2016-08-07)[2017-11-29]. http:∥finance. china. com. cn/roll/20160807/3847416.shtml.
[4]韩沁珂.龙羊峡建了“世界最大光伏电站”一年可发电14亿千瓦时[EB/OL].(2017-03-21)[2017-11-29]. http:∥guangfu.bjx.com.cn/news/20170321/815456.shtm.
[5]杨秀媛,刘小河,张芳,等.大型太阳能并网发电模型及应用[J].中国电机工程学报,2011,31(增刊1):19-22.YANG Xiuyuan,LIU Xiaohe,ZHANG Fang,et al. Model of large PV and its applications on power system analysis[J]. Proceedings of the CSEE,2011,31(Supplyment 1):19-22.
[6]张巍,向铁元,李安,等.基于MATLAB-PSASP的光伏并网暂态稳定计算模型[J].电力自动化设备,2012,32(6):80-85.ZHANG Wei,XIANG Tieyuan,LI An,et al. MATLAB-PSASP based transient stability computation model for grid-connection of PV power system[J]. Electric Power Automation Equipment,2012,32(6):80-85.
[7]潘雄,张龙,黄家栋,等.基于Sobol序列和混合Copula的含风电和光伏电力系统暂态稳定分析[J].太阳能学报,2015,36(7):1622-1631.PAN Xiong,ZHANG Long,HUANG Jiadong,et al. Transient stability analysis of power system integrated with wind farms and photovoltaic plants based on Sobol sequence and mixed-Copula[J]. Acta Energiae Solaris Sinica,2015,36(7):1622-1631.
[8]余贻鑫.电力系统安全域方法研究述评[J].天津大学学报,2008,41(6):635-646.YU Yixin. Review of study on methodology of security regions of power system[J]. Journal of Tianjin University,2008,41(6):635-646.
[9]余贻鑫,栾文鹏.利用拟合技术决定实用电力系统动态安全域[J].中国电机工程学报,1990,10(增刊1):22-28.YU Yixin,LUAN Wenpeng. Practical dynamic security regions of power systems[J]. Proceedings of the CSEE,1990,10(Supplyment1):22-28.
[10]余贻鑫,曾沅,冯飞.电力系统注入空间动态安全域的微分拓扑特性[J].中国科学(E辑),2002,32(4):503-509.YU Yixin,ZENG Yuan,FENG Fei. Differential topological characteristic of the DSR on injection space of electrical power system[J].Science in China(Series E),2002,32(4):503-509.
[11]刘怀东,陈彧,崔晓君,等.基于期望损失指标的电力系统故障筛选和排序[J].电力系统保护与控制,2016,44(14):8-13.LIU Huaidong,CHEN Yu,CUI Xiaojun,et al. Contingency screening and ranking based on dynamic security region of the power system[J]. Power System Protection and Control,2016,44(14):8-13.
[12]王东涛,余贻鑫,付川.基于实用动态安全域的输电系统概率动态安全评估[J].中国电机工程学报,2007,27(7):29-33.WANG Dongtao,YU Yixin,FU Chuan. Practical dynamic security region based probabilistic dynamic security assessment of power transmission system[J]. Proceedings of the CSEE,2007,27(7):29-33.
[13]徐箭,陈允平.基于动态安全域的电力系统暂态稳定预防控制、紧急控制及其协调[J].电力自动化设备,2009,29(8):1-7.XU Jian,CHEN Yunping. Coordination between preventive control and emergency control for transient stability of power system based on dynamic security region[J]. Electric Power Automation Equipment,2009,29(8):1-7.
[14]刘怀东,张江红,刘沛龙,等.基于改进解析法的小范围动态安全域搜索方法[J].电力自动化设备,2012,32(2):29-33.LIU Huaidong,ZHANG Jianghong,LIU Peilong,et al. Small-range search of DSR based on improved analytical method[J]. Electric Power Automation Equipment,2012,32(2):29-33.
[15]中国电力科学研究院. PSD-BPA暂态稳定程序用户手册[M].4.23版.北京:中国电力学研究院,2012:216-224.