考虑特高压直流馈入的受端输电网架优化方法
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摘要
特高压直流输电线路的馈入使得受端输电网络的安全经济运行受到影响,为此该文提出了一种考虑特高压直流输电线路馈入的受端输电网架优化方法,在保障经济性的同时有效提高受端网络的安全稳定性。首先进行多场景构建以模拟负荷的时序波动特性,并对复杂场景进行缩减,获得典型运行场景集。在此基础上,建立受端输电网架双层多目标优化模型,模型外层以安全稳定性、经济性及环保性作为优化目标,模型内层以系统运行成本为目标进行最优潮流计算。利用NSGA-Ⅱ算法求解模型,形成Pareto非劣解集,并通过综合决策方法选取最优决策方案。最后结合算例验证了所提方法的有效性。
UHVDC infeed brings great influence for the stable and safe operation of receiving-end power transmission network. This paper proposes an optimization model for receiving-end power transmission network considering UHVDC infeed. Firstly,typical operation scenes are formed to simulate the fluctuation and uncertainties of loads. A two-layer multiobjective optimization model is established. The outer layer of the model is to optimize with the target of operation stability,economy and environmental performance. The inner layer of the model is essentially an optimal power flowmodel with the target of reducing operating cost. The model is solved with NSGA-Ⅱ algorithm to form Pareto non-inferior solutions,and the optimal decision plan is selected with comprehensive decision method. The case study results demonstrate the efficiency of the proposed approach.
UHVDC infeed brings great influence for the stable and safe operation of receiving-end power transmission network. This paper proposes an optimization model for receiving-end power transmission network considering UHVDC infeed. Firstly,typical operation scenes are formed to simulate the fluctuation and uncertainties of loads. A two-layer multiobjective optimization model is established. The outer layer of the model is to optimize with the target of operation stability,economy and environmental performance. The inner layer of the model is essentially an optimal power flowmodel with the target of reducing operating cost. The model is solved with NSGA-Ⅱ algorithm to form Pareto non-inferior solutions,and the optimal decision plan is selected with comprehensive decision method. The case study results demonstrate the efficiency of the proposed approach.
引文
[1]刘振亚.全球能源互联网跨国跨洲互联研究及展望[J].中国电机工程学报,2016,36(19):5103-5110,5391.LIU Zhenya.Research of global clean energy resource and pow er grid interconnection[J].Proceedings of the CSEE,2016,36(19):5103-5110,5391.
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[13]杨海涛,吉平,刘晋雄,等.特高压网架方案功能和可靠性分析[J].高电压技术,2017,43(3):1014-1022.YANG Haitao,JI Ping,LIU Jinxiong,et al.Analysis on the function and reliability of UHV grid-frame schemes[J].High Voltage Engineering,2017,43(3):1014-1022.
[14]赵良,易海琼,吴耀武.特高压交直流建设时序优化评估指标体系[J].电力建设,2016,37(1):56-63.ZHAO Liang,YI Haiqiong,WU Yaow u.Timing optimization evaluation index system of UHVAC and UHVDC project construction[J].Electric Pow er Construction,2016,37(1):56-63.
[15]沈郁,熊永新,姚伟,等.±1 100 k V特高压直流输电受端接入方式的综合评估[J].电力自动化设备,2018,38(8):195-202.SHEN Yu,XIONG Yongxin,YAO Wei,et al.Comprehensive evaluation for receiving and connection scheme of±1 100 kVUHVDC pow er transmission[J].Electric Pow er Automation Equipment,2018,38(8):195-202.
[16]刘振亚.特高压交直流电网[M].北京:中国电力出版社,2013:84-89.
[17]唐建清.一种快速估算运行状态母线短路容量的方法[J].江苏电机工程,2014,33(6):26-29.TANG Jianqing.A method for fast calculation of operating bus short-circuit capacity[J].Jiangsu Electrical Engineering,2014,33(6):26-29.
[18]姜惠兰,安星,王亚微,等.基于改进NSGA2算法的考虑风机接入电能质量的多目标电网规划[J].中国电机工程学报,2015,35(21):5405-5411.JIANG Huilan,AN Xing,WANG Yaw ei,et al.Improved NSGA2algorithm based multi-objective planning of pow er grid w ith w ind farm considering pow er quality[J].Proceedings of the CSEE,2015,35(21):5405-5411.
[19]陆文甜,刘明波,林舜江,等.基于分布式内点法的多区域互联电力系统最优潮流分散式求解[J].中国电机工程学报,2016,36(24):6828-6837,6938.LU Wentian,LIU M ingbo,LIN Shunjiang,et al.Decentralized solution for optimal pow er flow of multi-area interconnected pow er systems based on distributed interior point method[J].Proceedings of the CSEE,2016,36(24):6828-6837,6938.
[20]李刚,焦亚菲,刘福炎,等.联合采用熵权和灰色系统理论的电力大数据质量综合评估[J].电力建设,2016,37(12):24-31.LI Gang,JIAO Yafei,LIU Fuyan,et al.Comprehensive evaluation of big data quality in pow er systems w ith entropy w eight and grey system theory[J].Electric Pow er Construction,2016,37(12):24-31.
[2]彭吕斌,何剑,谢开贵,等.特高压交流和直流输电系统可靠性与经济性比较[J].电网技术,2017,41(4):1098-1107.PENG Lübin,HE Jian,XIE Kaigui,et al.Comparison of reliability and economy betw een UHVAC and UHVDC transmission systems[J].Power System Technology,2017,41(4):1098-1107.
[3]张啸虎,陈陈.系统结构对多馈入直流系统短路比的影响[J].中国电机工程学报,2018,38(16):4777-4783,4982.ZHANG Xiaohu,CHEN Chen.Influence of system structure on multi-infeed HVDC short circuit ratio[J].Proceedings of the CSEE,2018,38(16):4777-4783,4982.
[4]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.
[5]章枫,辛焕海,徐谦,等.直流多馈入系统的广义短路比:影响因素分析[J].中国电机工程学报,2017,37(18):5303-5312,5529.ZHANG Feng,XIN Huanhai,XU Qian,et al.Generalized short circuit ratio for multi-infeed DC systems:Influence factors[J].Proceedings of the CSEE,2017,37(18):5303-5312,5529.
[6]林伟芳,汤涌,郭小江.多馈入交直流系统短路比影响因素分析[J].电网技术,2011,35(8):64-68.LIN Weifang,TANG Yong,GUO Xiaojiang.Analysis of influencing factors of short circuit ratio of multi-infeed AC/DCpow er systems[J].Pow er System Technology,2011,35(8):64-68.
[7]刘自发,于寒霄,王帅,等.综合考虑运行效率和弃风损失的输电网规划[J].电网技术,2018,42(3):827-834.LIU Zifa,YU Hanxiao,WANG Shuai,et al.Transmission grid planning considering operation efficiency and w ind curtailment loss[J].Power System Technology,2018,42(3):827-834.
[8]SOROUSH M,FULLER J D.Accuracies of optimal transmission sw itching heuristics based on DCOPF and ACOPF[J].IEEETransactions on Pow er Systems,2014,29(2):924-932.
[9]HEDMANK W,FER RIS MC,O’NEILL R P,et al.Cooptimization of generation unit commitment and transmission sw itching w ith N-1 reliability[J].IEEE Transactions on Pow er Systems,2010,25(2):1052-1063.
[10]KHODAEI A,SHAHID EHPOUR M.Transmission switching in security-constrained unit commitment[J].IEEE Transactions on Pow er Systems,2010,25(4):1937-1945.
[11]黄启航,王秀丽,齐世雄,等.考虑负荷和风电相关性的多场景鲁棒输电网规划[J].电力建设,2018,39(6):63-70.HUANG Qihang,WANG Xiuli,QI Shixiong,et al.M ulti-scenario robust transmission planning considering correlation betw een w ind pow er and load demand[J].Electric Pow er Construction,2018,39(6):63-70.
[12]张衡,程浩忠,曾平良,等.考虑N-1安全网络约束的输电网结构优化[J].电力自动化设备,2018,38(2):123-129.ZHANG Heng,CHENG Haozhong,ZENG Pingliang,et al.Optimal transmission sw itching considering N-1 security netw ork constraints[J].Electric Pow er Automation Equipment,2018,38(2):123-129.
[13]杨海涛,吉平,刘晋雄,等.特高压网架方案功能和可靠性分析[J].高电压技术,2017,43(3):1014-1022.YANG Haitao,JI Ping,LIU Jinxiong,et al.Analysis on the function and reliability of UHV grid-frame schemes[J].High Voltage Engineering,2017,43(3):1014-1022.
[14]赵良,易海琼,吴耀武.特高压交直流建设时序优化评估指标体系[J].电力建设,2016,37(1):56-63.ZHAO Liang,YI Haiqiong,WU Yaow u.Timing optimization evaluation index system of UHVAC and UHVDC project construction[J].Electric Pow er Construction,2016,37(1):56-63.
[15]沈郁,熊永新,姚伟,等.±1 100 k V特高压直流输电受端接入方式的综合评估[J].电力自动化设备,2018,38(8):195-202.SHEN Yu,XIONG Yongxin,YAO Wei,et al.Comprehensive evaluation for receiving and connection scheme of±1 100 kVUHVDC pow er transmission[J].Electric Pow er Automation Equipment,2018,38(8):195-202.
[16]刘振亚.特高压交直流电网[M].北京:中国电力出版社,2013:84-89.
[17]唐建清.一种快速估算运行状态母线短路容量的方法[J].江苏电机工程,2014,33(6):26-29.TANG Jianqing.A method for fast calculation of operating bus short-circuit capacity[J].Jiangsu Electrical Engineering,2014,33(6):26-29.
[18]姜惠兰,安星,王亚微,等.基于改进NSGA2算法的考虑风机接入电能质量的多目标电网规划[J].中国电机工程学报,2015,35(21):5405-5411.JIANG Huilan,AN Xing,WANG Yaw ei,et al.Improved NSGA2algorithm based multi-objective planning of pow er grid w ith w ind farm considering pow er quality[J].Proceedings of the CSEE,2015,35(21):5405-5411.
[19]陆文甜,刘明波,林舜江,等.基于分布式内点法的多区域互联电力系统最优潮流分散式求解[J].中国电机工程学报,2016,36(24):6828-6837,6938.LU Wentian,LIU M ingbo,LIN Shunjiang,et al.Decentralized solution for optimal pow er flow of multi-area interconnected pow er systems based on distributed interior point method[J].Proceedings of the CSEE,2016,36(24):6828-6837,6938.
[20]李刚,焦亚菲,刘福炎,等.联合采用熵权和灰色系统理论的电力大数据质量综合评估[J].电力建设,2016,37(12):24-31.LI Gang,JIAO Yafei,LIU Fuyan,et al.Comprehensive evaluation of big data quality in pow er systems w ith entropy w eight and grey system theory[J].Electric Pow er Construction,2016,37(12):24-31.