计及源-网-荷互动的主动配电网实时动态孤岛划分策略
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摘要
现有的主动配电网孤岛划分策略大多以静态孤岛划分为主,没有充分考虑整个故障时段内配电系统中发电单元、网架结构、柔性负荷等可变单元的变化,这使得静态孤岛划分策略在效率上略显不足。考虑主动配电网的特性,提出基于启发式算法的计及源-网-荷互动协调的主动配电网实时动态孤岛划分策略,用以主动配电网极端故障状况下。与传统的静态孤岛划分策略不同,所提出的策略对故障时段内的孤岛系统进行按一定时间尺度的实时动态划分,充分利用主动配电网中灵活可调的柔性负荷与网架结构的调度与改变,配合系统中分布式发电单元的出力,使整个故障时段内供电孤岛的划分能够更加合理高效。通过仿真论证了柔性负荷在主动配电网孤岛划分中的作用及适用范围,通过算例的比较分析验证了所提出策略在特殊应用环境下的有效性。
Most of the existing active distribution network island partition strategies are mainly static island separation.The variation of power generation unit,grid structure,flexible loads and other variable units in the distribution system during the whole fault period is not fully considered,and this makes the static is land partition strategy slightly less efficient.Considering the characteristics of active distribution net work,a real-time dynamic island separation st rategy for active distribution network considering source-network-load's interaction and coordination is p roposed based on heuristic algorithm.This strategy can be used for active distribution network under extreme fault condition.Different from the traditional static island separation strategy,the proposed strategy divides real-time and dynamically the islanding system in the fault period according to a certain time scale.This strategy makes full use of the flexible loads which are flexible and adjustable and the scheduling and change of grid structure in active distribution network.Addtionally,this strategy cooperates with the output of distributed generation units in the system,so that the partition of power supply islands in the whole fault period can be more reasonable and efficient.The function and applicable scope of flexible loads in island separation of active distribution network are proved by simulation.The effectiveness of the proposed strategy in special application environ ment is verified by comparison and analysis of an example.
Most of the existing active distribution network island partition strategies are mainly static island separation.The variation of power generation unit,grid structure,flexible loads and other variable units in the distribution system during the whole fault period is not fully considered,and this makes the static is land partition strategy slightly less efficient.Considering the characteristics of active distribution net work,a real-time dynamic island separation st rategy for active distribution network considering source-network-load's interaction and coordination is p roposed based on heuristic algorithm.This strategy can be used for active distribution network under extreme fault condition.Different from the traditional static island separation strategy,the proposed strategy divides real-time and dynamically the islanding system in the fault period according to a certain time scale.This strategy makes full use of the flexible loads which are flexible and adjustable and the scheduling and change of grid structure in active distribution network.Addtionally,this strategy cooperates with the output of distributed generation units in the system,so that the partition of power supply islands in the whole fault period can be more reasonable and efficient.The function and applicable scope of flexible loads in island separation of active distribution network are proved by simulation.The effectiveness of the proposed strategy in special application environ ment is verified by comparison and analysis of an example.
引文
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[14]李红伟,林山峰,吴华兵,等.基于动态规划算法的配电网孤岛划分策略[J].电力自动化设备,2017,37(1):47-52.LI Hongwei,LIN Shanfeng,WU Huabing,et al.Islanding strategy based on dynamic programming algorithm for distribution network[J].Electric Power Automation Equipment,2017,37(1):47-52.
[15]孙悦.有源配电网动态孤岛划分及网络重构策略研究[D].西安:西安理工大学,2018.
[2]陈芳,张利,韩学山,等.配电网线损概率评估及应用[J].电力系统保护与控制,2014,42(13):39-44.CHEN Fang,ZHANG Li,HAN Xueshan,et al.Line loss evaluation and application in distribution network[J].Power System Protection and Control,2014,42(13):39-44.
[3]李振坤,陈星莺,余昆,等.配电网重构的混合粒子群算法[J].中国电机工程学报,2008,28(31):35-41.LI Zhenkun,CHEN Xingying,YU Kun,et al.Hybrid particle swarm optimization for distribution network reconfiguration[J].Proceedings of the CSEE,2008,28(31):35-41.
[4]吕林,罗绮,刘俊勇,等.基于多种群分层粒子群优化的配电网络重构[J].电网技术,2009,39(19):56-60.L(U|¨)Lin,LUO Qi,LIU Junyong,et al.Reconfiguration of distribution network based on hierarchical structure polyparticle swarm optimization[J].Power System Technology,2009,39(19):56-60.
[5]颜湘武,段聪,吕正,等.基于动态拓扑分析的遗传算法在配电网重构中的应用[J].电网技术,2014,38(6):1639-1643.YAN Xiangwu,DUAN Cong,L(U|¨)Zheng,et al.Application of dynamic topological analysis based genetic algorithm in distribution network reconfiguration[J].Power System Technology,2014,38(6):1639-1643.
[6]李振坤,刘俊,杨帆,等.有源配电网的综合供电恢复及改进遗传算法[J].电力系统保护与控制,2014,42(17):24-30.LI Zhenkun,LIU Jun,YANG Fan,et al.Restoration of distribution network containing DG and a refined genetic algorithm[J].Power System Protection and Control,2014,42(17):24-30.
[7]韩祯祥,文福拴.人工神经元网络在电力系统中应用的新进展(一)[J].电力系统自动化,1993,17(1):53-59.HAN Zhenxiang,WEN Fushuan.The new development of artificial neural networks application to power system[J].Automation of Electric Power Systems,1993,17(1):53-59.
[8]葛少云,刘自发,余贻鑫.基于改进禁忌搜索的配电网重构[J].电网技术,2004,28(23):22-26.GE Shaoyun,LIU Zifa,YU Yixin.An improved Tabu search for reconfiguration of distribution systems[J].PowerSystem Technology,2004,28(23):22-26.
[9]郭腾云,刘艳.基于博弈方法的含分布式电源配电网重构优化[J].电力系统保护与控制,2017,45(7):28-34.GUO Tengyun,LIU Yan.Game theory based reconfiguration optimization for distribution network with distributed generations[J].Power System Protection and Control,2017,45(7):28-34.
[10]梁捷,李刚.基于节点特征分类的配电网重构辐射约束处理法[J].广东电力,2016,29(8):91-95.LIANG Jie,LI Gang.Radial constraint handling method for recongfiguration of power distribution network based on feature classification of nodes[J].Guangdong Electric Power,2016,29(8):91-95
[11]汪芳宗,王兆丰,基于混合整数二次锥规划方法的含分布式电源配电网优化重构方法[J].电力系统保护与控制,2016,44(24):24-30.WANG Fangzong,WANG Zhaofeng.An optimum reconfiguration method for distribution networks with DG based on mixed integer second-order cone programming[J].Power System Protection and Control,2016,44(24):24-30.
[12]邱剑洪,王星华,程小庆.基于停电损失估算的孤岛划分方法[J].智慧电力,2018,46(12):94-98.QIU Jianhong,WANG Xinghua,CHENG Xiaoqing.Islanding scheme based on estimation model of interruption cost[J].Smart Power,2018,46(12):94-98.
[13]王晶,陈骏宇,金华锋.含分布式电源的配电网动态孤岛划分博弈模型[J].电力系统保护与控制,2016,44(14):14-24.WANG Jing,CHEN Junyu,JIN Huafeng.Game model of dynamic island partition for distribution network with DGs[J].Power System Protection and Control,2016,44(14):14-24.
[14]李红伟,林山峰,吴华兵,等.基于动态规划算法的配电网孤岛划分策略[J].电力自动化设备,2017,37(1):47-52.LI Hongwei,LIN Shanfeng,WU Huabing,et al.Islanding strategy based on dynamic programming algorithm for distribution network[J].Electric Power Automation Equipment,2017,37(1):47-52.
[15]孙悦.有源配电网动态孤岛划分及网络重构策略研究[D].西安:西安理工大学,2018.