含多端柔性直流电网的调度计划优化建模
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摘要
发展建设多端柔性直流电网为大规模风光等清洁能源并网提供了一种新的技术手段。当直流电网与交流电网紧密耦合时,电网调度运行业务中的传统调度计划应用由于缺少对直流控制单元、交直流互动方式、直流电网潮流约束等问题的考虑,在调度对象、计划模式、平衡策略及交直流双侧网络约束等方面均缺少考虑。针对上述问题,提出了含多端柔性直流电网的调度计划优化建模方法。该模型可灵活处理交直流互动方式,新增了直流电网有功平衡及交直流双侧网络传输限额等约束,为直流电网纳入传统调度计划应用提供了一种建模策略。将所述模型应用于5端直流与新英格兰10机系统相结合的电网,验证了模型在处理交直流互联电网调度计划方面的灵活性及有效性。
The expansion and development of power grid with voltage source converter based multi-terminal direct current(VSC-MTDC)system provides a new technical means for grid-connection of large-scale wind power and other clean energy.To have the DC power grid and AC power grid tightly coupled,the traditional scheduling application in the power grid dispatching operation business lacks consideration of direct control unit,AC/DC interaction,DC power flow constraints and other problems,which will face new challenges in the scheduling object,schedule model,equilibrium strategy and AC/DC bilateral network constraints,etc.Aiming at the problems mentioned above,the scheduling optimization modeling method with flexible multi-terminal DC grid is proposed.The proposed model can flexibly deal with AC/DC interaction.The added constraints are those on a new DC power grid active equilibrium and AC/DC bilateral network transmission limits,thus providing a reference for modeling strategy of DC power supply in the traditional scheduling application.The model proposed is applied to the 5-terminal DC power grid connected with the New England 10-machine system,which verifies the effectiveness of the model in the processing of the AC/DC interconnected power grid dispatching schedules.
The expansion and development of power grid with voltage source converter based multi-terminal direct current(VSC-MTDC)system provides a new technical means for grid-connection of large-scale wind power and other clean energy.To have the DC power grid and AC power grid tightly coupled,the traditional scheduling application in the power grid dispatching operation business lacks consideration of direct control unit,AC/DC interaction,DC power flow constraints and other problems,which will face new challenges in the scheduling object,schedule model,equilibrium strategy and AC/DC bilateral network constraints,etc.Aiming at the problems mentioned above,the scheduling optimization modeling method with flexible multi-terminal DC grid is proposed.The proposed model can flexibly deal with AC/DC interaction.The added constraints are those on a new DC power grid active equilibrium and AC/DC bilateral network transmission limits,thus providing a reference for modeling strategy of DC power supply in the traditional scheduling application.The model proposed is applied to the 5-terminal DC power grid connected with the New England 10-machine system,which verifies the effectiveness of the model in the processing of the AC/DC interconnected power grid dispatching schedules.
引文
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[16]汪洋,夏清,康重庆.机组组合算法中起作用整数变量的辨识方法[J].中国电机工程学报,2010,30(13):46-52.WANG Yang,XIA Qing,KANG Chongqing.Identification of the active integer variables in security constrained unit commitment[J].Proceedings of the CSEE,2010,30(13):46-52.
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[18]赖晓文,钟海旺,杨军峰,等.基于价格响应函数的超大电网分解协调优化方法[J].电力系统自动化,2013,37(21):60-65.LAI Xiaowen,ZHONG Haiwang,YANG Junfeng,et al.Decomposed optimization method over large-scale power system based on price response function[J].Automation of Electric Power Systems,2013,37(21):60-65.
[2]孙栩,曹士冬,卜广全,等.架空线柔性直流电网构建方案[J].电网技术,2016,40(3):678-682.SUN Xu,CAO Shidong,BU Guangquan,et al.Construction scheme of overhead line flexible HVDC grid[J].Power System Technology,2016,40(3):678-682.
[3]李程昊,詹鹏,文劲宇,等.适用于大规模风电并网的多端柔性直流输电系统控制策略[J].电力系统自动化,2015,39(11):1-7.DOI:10.7500/AEPS20140717010.LI Chenghao,ZHAN Peng,WEN Jinyu,et al.A multiterminal VSC-HVDC system control strategy for large wind farms integration[J].Automation of Electric Power Systems,2015,39(11):1-7.DOI:10.7500/AEPS20140717010.
[4]许丹,王斌,张晓天,等.考虑节点控制模式的柔性直流电网潮流线性化计算方法[J].电力系统自动化,2017,41(19):54-58.DOI:10.7500/AEPS20170120012.XU Dan,WANG Bin,ZHANG Xiaotian,et al.Linearized calculating method for power flow of flexible DC power grid considering node control mode[J].Automation of Electric Power Systems,2017,41(19):54-58.DOI:10.7500/AEPS20170120012.
[5]和敬涵,李智诚,王小君,等.计及多种控制方式的直流电网潮流计算方法[J].电网技术.2016,40(3):712-718.HE Jinghan,LI Zhicheng,WANG Xiaojun,et al.Power flow algorithm for DC grid considering various control modes[J].Power System Technology,2016,40(3):712-718.
[6]钱甜甜,苗世洪.基于节点电流关系的多端柔性直流输电系统潮流计算[J].电网技术,2016,40(5):1308-1312.QIAN Tiantian,MIAO Shihong.Power flow algorithm of multi-terminal VSC-HVDC system based on nodal current relation[J].Power System Technology,2016,40(5):1308-1312.
[7]孙银锋,吴学光,汤广福,等.基于节点阻抗矩阵GS法的直流电网稳态潮流计算[J].中国电机工程学报,2015,35(8):1882-1892.SUN Yinfeng,WU Xueguang,TANG Guangfu,et al.A nodal impedance matrix based Gauss-Seidel method on steady state power flow calculation of DC power grid[J].Proceedings of the CSEE,2015,35(8):1882-1892.
[8]陈树勇,徐林岩,孙栩,等.基于多端柔性直流输电的风电并网控制研究[J].中国电机工程学报,2014,34(增刊1):32-38.CHEN Shuyong,XU Linyan,SUN Xu,et al.The control of wind power integration based on multi-terminal high voltage DCtransmission with voltage source converter[J].Proceedings of the CSEE,2014,34(Supplement 1):32-38.
[9]许丹,王斌,张加力,等.特高压直流外送风光火电力一体化调度计划模型[J].电力系统自动化,2016,40(6):25-29.DOI:10.7500/AEPS20150727003.XU Dan,WANG Bin,ZHANG Jiali,et al.Integrated transmission scheduling model for wind-photovoltaic-thermal power by ultra-high voltage direct current system[J].Automation of Electric Power Systems,2016,40(6):25-29.DOI:10.7500/AEPS20150727003.
[10]王斌,夏叶,夏清,等.直流跨区互联电网发输电计划模型与方法[J].电力系统自动化,2016,40(3):8-13.DOI:10.7500/AEPS20150508015.WANG Bin,XIA Ye,XIA Qing,et al.Model and methods of generation and transmission scheduling of inter-regional power grid via HVDC tie-line[J].Automation of Electric Power Systems,2016,40(3):8-13.DOI:10.7500/AEPS20150508015.
[11]钟海旺,夏清,丁茂生,等.以直流联络线运行方式优化提升新能源消纳能力的新模式[J].电力系统自动化,2015,39(3):36-42.DOI:10.7500/AEPS20140529005.ZHONG Haiwang,XIA Qing,DING Maosheng,et al.A new mode of HVDC tie-line operation optimization for maximizing renewable energy accommodation[J].Automation of Electric Power Systems,2015,39(3):36-42.DOI:10.7500/AEPS20140529005.
[12]韩红卫,涂孟夫,张慧玲,等.考虑跨区直流调峰的日前发电计划优化方法及分析[J].电力系统自动化,2015,39(16):138-143.DOI:10.7500/AEPS20140909004.HAN Hongwei,TU Mengfu,ZHANG Huiling,et al.Dayahead generation scheduling method considering adjustable HVDC plan and its analysis[J].Automation of Electric Power Systems,2015,39(16):138-143.DOI:10.7500/AEPS20140909004.
[13]许丹,蔡帜,李晓磊,等.基于约束调整的多级计划协调模型[J].电力系统自动化,2015,39(1):147-150.DOI:10.7500/AEPS20140219002.XU Dan,CAI Zhi,LI Xiaolei,et al.Multi-level coordination plan model based on constrained adjustment[J].Automation of Electric Power Systems,2015,39(1):147-150.DOI:10.7500/AEPS20140219002.
[14]张晓辉,董兴华.含风电场多目标低碳电力系统动态经济调度研究[J].电网技术,2013,37(1):24-31.ZHANG Xiaohui,DONG Xinghua.Research on multiobjective scheduling for low-carbon power system with wind farms[J].Power System Technology,2013,37(1):24-31.
[15]尚金成,庞博,王清敏,等.节能发电调度经济补偿机制市场模型及算法[J].电网技术,2010,34(4):62-68.SHANG Jincheng,PANG Bo,WANG Qingmin,et al.Market model and algorithms for economic compensation mechanism of energy-saving generation dispatch[J].Power System Technology,2010,34(4):62-68.
[16]汪洋,夏清,康重庆.机组组合算法中起作用整数变量的辨识方法[J].中国电机工程学报,2010,30(13):46-52.WANG Yang,XIA Qing,KANG Chongqing.Identification of the active integer variables in security constrained unit commitment[J].Proceedings of the CSEE,2010,30(13):46-52.
[17]BARTH R,BRAND H,MEIBOM P,et al.A stochastic unitcommitment model for the evaluation of the impacts of integration of large amounts of intermittent wind power[C]//IEEE International Conference on Probabilistic Methods Applied to Power Systems,June 11-15,2006,Stockholm,Sweden:8p.
[18]赖晓文,钟海旺,杨军峰,等.基于价格响应函数的超大电网分解协调优化方法[J].电力系统自动化,2013,37(21):60-65.LAI Xiaowen,ZHONG Haiwang,YANG Junfeng,et al.Decomposed optimization method over large-scale power system based on price response function[J].Automation of Electric Power Systems,2013,37(21):60-65.