基于广义短路比的光伏多馈入系统容量优化方法
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摘要
广义短路比可用于描述电力电子多馈入系统小干扰稳定性,基于此指标研究了光伏发电(或场)多点馈入电网的总容量一定时,各点接入容量优化分配的问题,使光伏多馈入系统的小干扰稳定裕度最大。首先,建立了光伏多馈入系统的小干扰稳定分析模型;其次,利用广义短路比关于各馈入点光伏接入容量的灵敏度,提出了光伏多馈入系统的并网点容量优化方法;最后,以光伏三馈入系统为例,验证所提容量优化方法的可行性和有效性。仿真结果表明,合理分配多点接入时光伏的并网容量,能够有效提高系统的广义短路比和小干扰稳定裕度。
Generalized short circuit ratio(gSCR)is able to characterize the small signal stability of multi-infeed system with power electronic devices.Based on the gSCR index,the allocation optimization problem of grid-connected capacity of each feeding point is investigated when the total grid-connected capacity of photovoltaic(PV)devices(or fields)is fixed to make the small signal stability margin of multi-infeed PV system maximized.Firstly,the small signal stability analysis model for multiinfeed PV system is established.Secondly,based on the sensitivity of gSCR to grid-connected PV capacity at each feeding point,a capacity optimization method for multi-infeed PV system is proposed.Finally,with three-infeed PV system as an calculation example,the feasibility and effectiveness of the proposed capacity optimization method are verified.The simulation results show that the reasonable distribution of grid-connected PV capacity accessed to multiple points can effectively enhance the gSCR of multi-infeed PV system and increase the small signal stability margin.
Generalized short circuit ratio(gSCR)is able to characterize the small signal stability of multi-infeed system with power electronic devices.Based on the gSCR index,the allocation optimization problem of grid-connected capacity of each feeding point is investigated when the total grid-connected capacity of photovoltaic(PV)devices(or fields)is fixed to make the small signal stability margin of multi-infeed PV system maximized.Firstly,the small signal stability analysis model for multiinfeed PV system is established.Secondly,based on the sensitivity of gSCR to grid-connected PV capacity at each feeding point,a capacity optimization method for multi-infeed PV system is proposed.Finally,with three-infeed PV system as an calculation example,the feasibility and effectiveness of the proposed capacity optimization method are verified.The simulation results show that the reasonable distribution of grid-connected PV capacity accessed to multiple points can effectively enhance the gSCR of multi-infeed PV system and increase the small signal stability margin.
引文
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[16]丁明,王伟胜,王秀丽,等.大规模光伏发电对电力系统影响综述[J].中国电机工程学报,2014,34(1):2-14.DING Ming,WANG Weisheng,WANG Xiuli,et al.A review on the effect of large-scale PV generation on power systems[J].Proceedings of the CSEE,2014,34(1):2-14.
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[18]董炜,辛焕海,李子恒,等.变流器并网系统振荡与原-对偶复电路分析[J].中国电机工程学报,2017,37(22):6500-6515.DONG Wei,XIN Huanhai,LI Ziheng,et al.Primal-dual complex circuit of grid-connected converters for oscillation analysis[J].Proceedings of the CSEE,2017,37(22):6500-6515.
[19]RYGG A,MOLINAS M,CHEN Z,et al.A modified sequence domain impedance definition and its equivalence to the dq-domain impedance definition for the stability analysis of ac power electronic systems[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2016,4(4):1383-1396.
[20]WEN B,BOROYEVICH D,BURGOS R,et al.Analysis of dq small-signal impedance of grid-tied inverters[J].IEEETransactions on Power Electronics,2016,31(1):675-687.
[21]辛焕海,章枫,于洋,等.多馈入直流系统广义短路比:定义与理论分析[J].中国电机工程学报,2016,36(3):633-647.XIN Huanhai,ZHANG Feng,YU Yang,et al.Generalized short circuit ratio for multi-infeed DC systems:definition and theoretical analysis[J].Proceedings of the CSEE,2016,36(3):633-647.
[22]KUNDUR P.Power system stability and control[M].New York:McGraw-Hill,1994.
[23]甘德强,杨莉,冯冬涵.电力经济与电力市场[M].北京:机械工业出版社,2010.GAN Deqiang,YANG Li,FENG Donghan.Power economy and electricity market[M].Beijing:Mechanical Industry Press,2010.
[24]徐德鸿.电力电子系统建模及控制[M].北京:机械工业出版社,2006.XU Dehong.Power electronic system model and control[M].Beijing:Mechanical Industry Press,2006.
[2]康重庆,姚良忠.高比例可再生能源电力系统的关键科学问题与理论研究框架[J].电力系统自动化,2017,41(9):2-11.DOI:10.7500/AEPS20170120004.KANG Chongqing,YAO Liangzhong.Key scientific issues and theoretical research framework for power systems with high proportion of renewable energy[J].Automation of Electric Power Systems,2017,41(9):2-11.DOI:10.7500/AEPS20170120004.
[3]王冠中,陈荧,王蕾,等.应用切比雪夫多项式滤波的高渗透率光伏分布式控制策略[J].电力系统自动化,2017,41(21):133-139.DOI:10.7500/AEPS20170405007.WANG Guanzhong,CHEN Ying,WANG Lei,et al.Distributed control strategy for photovoltaic units with high permeability using Chebyshev polynomials filtering[J].Automation of Electric Power Systems,2017,41(21):133-139.DOI:10.7500/AEPS20170405007.
[4]KROPOSKI B.Integrating high levels of variable renewable energy into electric power systems[J].Journal of Modern Power Systems and Clean Energy,2017,5(6):831-837.
[5]葛景,都洪基,赵大伟,等.光伏电站接入对多机电力系统低频振荡的影响分析[J].电力系统自动化,2016,40(22):63-70.DOI:10.7500/AEPS20151223004.GE Jing,DU Hongji,ZHAO Dawei,et al.Influences of gridconnected photovoltaic power plants on low frequency oscillation of multi-machine power systems[J].Automation of Electric Power Systems,2016,40(22):63-70.DOI:10.7500/AEPS20151223004.
[6]王冠中,董炜,辛焕海,等.基于广义短路比的电力电子多馈入系统小干扰概率稳定评估[J].电力系统自动化,2018,42(18):17-24.DOI:10.7500/AEPS20170910004.WANG Guanzhong,DONG Wei,XIN Huanhai,et al.Probabilistic stability evaluation of small disturbances for power electronic multi-infeed system based on generalized short-circuit ratio[J].Automation of Electric Power Systems,2018,42(18):17-24.DOI:10.7500/AEPS20170910004.
[7]LIU S,LIU P X,WANG X.Stochastic small-signal stability analysis of grid-connected photovoltaic systems[J].IEEETransactions on Industrial Electronics,2016,63(2):1027-1038.
[8]MORTAZAVIAN S,SHABESTARY M M,MOHAMED A RI.Analysis and dynamic performance improvement of gridconnected voltage-source converters under unbalanced network conditions[J].IEEE Transactions on Power Electronics,2017,32(10):8134-8149.
[9]WU Y K,YE G T,SHAABAN M.Analysis of impact of integration of large PV generation capacity and optimization of PV capacity:case studies in Taiwan[J].IEEE Transactions on Industry Applications,2016,52(6):4535-4548.
[10]WOYTE A,THONG V V,BELMANS R,et al.Voltage fluctuations on distribution level introduced by photovoltaic systems[J].IEEE Transactions on Energy Conversion,2006,21(1):202-209.
[11]章力,高元海,熊宁,等.考虑潮流倒送约束的分布式光伏电站选址定容规划[J].电力系统自动化,2014,38(17):43-48.DOI:10.7500/AEPS20140509005.ZHANG Li,GAO Yuanhai,XIONG Ning,et al.Siting and sizing of distributed photovoltaic power station considering reverse power flow constraints[J].Automation of Electric Power Systems,2014,38(17):43-48.DOI:10.7500/AEPS20140509005.
[12]张卫国,王会桥.微网中光伏电源容量优化研究[J].华北电力大学学报(自然科学版),2014,41(2):51-54.ZHANG Weiguo,WANG Huiqiao.Research on photovoltaic power capacity optimization in microgrid[J].Journal of North China Electric Power University(Natural Science Edition),2014,41(2):51-54.
[13]徐林,阮新波,张步涵,等.风光蓄互补发电系统容量的改进优化配置方法[J].中国电机工程学报,2012,32(25):88-98.XU Lin,RUAN Xinbo,ZHANG Buhan,et al.An improved optimal sizing method for wind-solar-battery hybrid power system[J].Proceedings of the CSEE,2012,32(25):88-98.
[14]白晓清,吴雪颖,李佩杰,等.计及电压稳定裕度的配电网光伏发电选址与定容[J].现代电力,2015,32(4):34-41.BAI Xiaoqing,WU Xueying,LI Peijie,et al.Location and sizing of photovoltaic power generations by considering voltage stability margin of distribution system[J].Modern Electric Power,2015,32(4):34-41.
[15]辛焕海,董炜,袁小明,等.电力电子多馈入电力系统的广义短路比[J].中国电机工程学报,2016,36(22):6013-6027.XIN Huanhai,DONG Wei,YUAN Xiaoming,et al.Generalized short circuit ratio for multi power electronic based devices infeed to power systems[J].Proceedings of the CSEE,2016,36(22):6013-6027.
[16]丁明,王伟胜,王秀丽,等.大规模光伏发电对电力系统影响综述[J].中国电机工程学报,2014,34(1):2-14.DING Ming,WANG Weisheng,WANG Xiuli,et al.A review on the effect of large-scale PV generation on power systems[J].Proceedings of the CSEE,2014,34(1):2-14.
[17]张前进,周林,解宝,等.针对电网阻抗的大型光伏并网系统稳定性分析与提高策略[J].电力系统自动化,2017,41(21):127-132.DOI:10.7500/AEPS20170413004.ZHANG Qianjin,ZHOU Lin,XIE Bao,et al.Analysis and improvement strategy for stability of large-scale grid-connected photovoltaic system considering grid impedance[J].Automation of Electric Power Systems,2017,41(21):127-132.DOI:10.7500/AEPS20170413004.
[18]董炜,辛焕海,李子恒,等.变流器并网系统振荡与原-对偶复电路分析[J].中国电机工程学报,2017,37(22):6500-6515.DONG Wei,XIN Huanhai,LI Ziheng,et al.Primal-dual complex circuit of grid-connected converters for oscillation analysis[J].Proceedings of the CSEE,2017,37(22):6500-6515.
[19]RYGG A,MOLINAS M,CHEN Z,et al.A modified sequence domain impedance definition and its equivalence to the dq-domain impedance definition for the stability analysis of ac power electronic systems[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2016,4(4):1383-1396.
[20]WEN B,BOROYEVICH D,BURGOS R,et al.Analysis of dq small-signal impedance of grid-tied inverters[J].IEEETransactions on Power Electronics,2016,31(1):675-687.
[21]辛焕海,章枫,于洋,等.多馈入直流系统广义短路比:定义与理论分析[J].中国电机工程学报,2016,36(3):633-647.XIN Huanhai,ZHANG Feng,YU Yang,et al.Generalized short circuit ratio for multi-infeed DC systems:definition and theoretical analysis[J].Proceedings of the CSEE,2016,36(3):633-647.
[22]KUNDUR P.Power system stability and control[M].New York:McGraw-Hill,1994.
[23]甘德强,杨莉,冯冬涵.电力经济与电力市场[M].北京:机械工业出版社,2010.GAN Deqiang,YANG Li,FENG Donghan.Power economy and electricity market[M].Beijing:Mechanical Industry Press,2010.
[24]徐德鸿.电力电子系统建模及控制[M].北京:机械工业出版社,2006.XU Dehong.Power electronic system model and control[M].Beijing:Mechanical Industry Press,2006.