计及电能质量影响的智能配电网孤岛划分策略

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摘要现有智能配电网孤岛划分研究主要从功率平衡的角度出发,对电网安全约束考虑不充分,未考虑电能质量的影响,难以保证孤岛安全可靠运行。提出一种计及电能质量影响的智能配电网孤岛划分策略。故障后,首先计及联络开关进行网络连通性分析,进行初始孤岛划分。然后,对每个初始孤岛,建立切负荷-网络重构双层优化模型,并采用微分进化算法和混合粒子群算法求解,以降低搜索空间维数。具体地,在切负荷优化模型中,在允许频偏范围内充分发挥DG的调频特性,以减少负荷切除量;在网络重构优化模型中,建立包含频率约束、负序及谐波不确定性约束的电能质量综合约束集。提出基于序列二次规划法的配电网柔性潮流算法计算频率偏移条件下的孤岛潮流,引入点估计法进行负序、谐波不确定性分析,以改善孤岛的电能质量,提高其运行可靠性。最后,基于实际复杂配电网算例,验证了该策略的有效性和优越性。

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	陈汝斯
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关键词 ：智能配电网, 孤岛划分, 双层优化规划模型, 电能质量, 点估计法

Abstract：Recent researches of island separation in smart distribution grid are usually analyzed in the view of power balance,while the effects of power quality factors,which may affect the safe and reliable operation of island,are not considered.A new strategy of island separation considering the effects of power quality factors was proposed in this paper.Firstly,based on the network connectivity analysis,the original islands were divided by considering the tie-switches.For each original island,a two-layer optimization model of load-shedding and network reconfiguration,was established to decrease search space dimension and solved with evolution algorithm and improved hybrid particle swarm optimization algorithm.In load-shedding optimization model,frequency regulation characteristic of distributed generators was fully used to reduce load removal.In network reconfiguration optimization model,the comprehensive constraint set of frequency,uncertainty indices of negative sequence and harmonic components was established to improve the operation reliability of islands.A flexible power flow algorithm based on sequential quadratic programming was exploited to calculate the power flow under frequency deviation of each island.Point estimate method was introduced to do uncertainty analyses of negative sequence and harmonic components.Via an actual complex distribution grid model,effectiveness and advantages of the proposed strategy were verified.

Key words： Smart distribution grid island separation two-layer optimization model power quality point estimate method

收稿日期: 2016-08-21 出版日期: 2017-03-23

PACS:

TM73

基金资助:国家自然科学基金项目(51177111)和太阳能高效利用湖北省协同创新中心重大专项(HBSZD2014003)资助。

作者简介: 陈汝斯男,1991年生,博士研究生,研究方向为电力系统运行与控制、电能质量等。E-mail:923090828@qq.com林涛男,1969年生,教授,博士生导师,研究方向为电力系统运行与控制、电力系统继电保护、电能质量分析与控制等。E-mail:tlin@whu.edu.com(通信作者)

引用本文:

陈汝斯,林涛,余光正,毕如玉,徐遐龄. 计及电能质量影响的智能配电网孤岛划分策略[J]. 电工技术学报, 2016, 31(增刊2): 150-158. Chen Rusi,Lin Tao,Yu Guangzheng,Bi Ruyu,Xu Xialing. Island Separation Strategy of Smart Distribution Grid Considering the Effects of Power Quality Factors. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 150-158.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I增刊2/150

[1] 秦红霞,谭志海,葛亮,等.智能配电网自愈控制系统技术研究与设计[J].电力系统保护与控制,2014,42(22):134-139.
Qin Hongxia,Tan Zhihai,Ge Liang,et al.Study and design of smart distribution grid self-healing control system technology[J].Power System Protection and Control,2014,42(22):134-139.
[2] 杨丽君,于琦,魏玲玲,等.基于移动多代理动态联盟的配电网故障恢复研究[J].电工技术学报,2016,31(8):147-155.
Yang Lijun,Yu Qi,Wei Lingling,et al.A distribution network fault recovery study on the dynamic alliance of mobile multi-agent[J].Transactions of China Electrotechnical Society,2016,31(8):147-155.
[3] 王增平,姚玉海,郭昆亚,等.基于等级偏好优序法和切负荷的配电网故障恢复[J].电工技术学报,2015,30(20):185-192.
Wang Zengping,Yao Yuhai,Guo Kunya,et al.Distribution network service restoration based on rank preference optimal and load shedding[J].Transactions of China Electrotechnical Society,2015,30(20):185-192.
[4] 于文鹏,刘东,翁嘉明.含分布式电源的配电网供电恢复模型以及改进贪婪算法[J].电力系统自动化,2013,37(24):23-30.
Yu Wenpeng,Liu Dong,Weng Jiaming.A power restoring model for distribution network containing distributed generators and improved greedy algorithm[J].Automation of Electric Power System,2013,37(24):23-30.
[5] 李中雷,宋蕙慧,曲延滨.基于母线Agent的微电网孤岛协调控制策略[J].电工技术学报,2015,30(增刊1):370-376.
Li Zhonglei,Song Huihui,Qu Yanbin.A coordinate control strategy of islanded microgrid based on bus agent[J].Transactions of China Electrotechnical Society,2015,30(S1):370-376.
[6] 李振坤,周伟杰,钱啸,等.有源配电网孤岛恢复供电及黑启动策略研究[J].电工技术学报,2015,30(21):67-75.
Li Zhenkun,Zhou Weijie,Qian Xiao,et al.Distribution network restoration and black start based on distributed generators[J].Transactions of China Electrotechnical Society,2015,30(21):67-75.
[7] 易新,陆于平.分布式发电条件下的配电网孤岛划分算法[J].电网技术,2006,30(7):49-54.
Yi Xin,Lu Yuping.Islanding algorithm of distribution network with distributed generators[J].Power System Technology,2006,30(7):49-54.
[8] 丁磊,潘贞存,丛伟.基于有根树的分布式发电孤岛搜索[J].中国电机工程学报,2008,28(25):62-67.
Ding Lei,Pan Zhencun,Cong Wei.Searching for intentional islanding strategies of distributed generation based on rooted tree[J].Proceedings of the CSEE,2008,28(25):62-67.
[9] 王旭东,林济铿.基于分支定界的含分布式发电配网孤岛划分[J].中国电机工程学报,2011,31(7):16-20.
Wang Xudong,Lin Jikeng.Island Partition of the distribution system with distributed generation based on branch and bound algorithm[J].Proceedings of the CSEE,2011,31(7):16-20.
[10]向月,刘俊勇,姚良忠,等.故障条件下含分布式电源配网的孤岛划分与重构优化策略研究[J].电网技术,2013,37(4):1025-1032.
Xiang Yue,Liu Junyong,Yao Liangzhong,et al.Optimization strategy for island partitioning and reconfiguration of faulted distribution network containing distributed generation[J].Power System Technology,2013,37(4):1025-1032.
[11]李飞,徐弢,林济铿,等.计及分布式电源出力和负荷不确定性的配电网孤岛划分.电力系统自动化,2015,39(14):105-113.
Li Fei,Xu Tao,Lin Jikeng,et al.Island partition of distributed network considering uncertainty of distributed generators and loads[J].Automation of Electric Power Systems,2015,39(14):105-113.
[12]董晓峰,陆于平.基于改进Prim算法的分布式发电孤岛划分方法[J].电网技术,2010,34(9):195-201.
Dong Xiaofeng,Lu Yuping.Islanding Algorithm for distributed generators based on improved prim algorithm[J].Power System Technology,2010,34(9):195-201.
[13]刘宗歧,鲍巧敏,孙春山,等.基于改进Kruskal 算法的含分布式发电的配网孤岛划分算法[J].电工技术学报,2013,28(9):164-171.
Liu Zongqi,Bao Qiaomin,Sun Chunshan,et al.Islanding algorithm of distribution system with distributed generations based on improved Kruskal algorithm[J].Transactions of China Electrotechnical Society,2013,28(9):164-171.
[14]贺星棋,刘俊勇,杨可,等.分布式电源对故障恢复初期不平衡孤网稳态特性影响[J].电工技术学报,2011,26(7):120-125.
He Xingqi,Liu Junyong,Yang Ke,et al.Effects of distributed generation on steady-state characteristics of unbalanced isolated power system in initial period of fault restoration[J].Transactions of China Electrotechnical Society,2011,26(7):120-125.
[15]郭小强,邬伟扬,漆汉宏.电网电压畸变不平衡情况下三相光伏并网逆变器控制策略[J].中国电机工程学报,2013,33(3):22-28.
Guo Xiaoqiang,Wu Weiyang,Qi Hanhong.Control strategies of three-phase PV grid-connected inverter under distorted and unbalanced voltage conditions[J].Proceedings of the CSEE,2013,33(3):22-28.
[16]余欣梅,李妍,熊信艮.基于PSO考虑谐波影响的补偿电容器优化配置[J].中国电机工程学报,2003,23(2):26-30.
Yu Xinmei,Li Yan,Xiong Xinyin,et al.Optimal shunt capacitor placement using particle swarm optimization algorithm with harmonic distribution consideration[J].Proceedings of the CSEE,2003,23(2):26-30.
[17]刘开,王毕元,罗晓辉.电网规划中网络连通性判别新方法[J].长春工业大学学报(自然科学版),2009,30(4):421-424.
Liu Kai,Wang Biyuan,Luo Xiaohui.A new judging method for the network connectivity in the net plan[J].Journal of Changchun University of Technology (Natural Science Edition),2009,30(4):421-424.
[18]Sun C L,Zeng J C,Pan J S.An improved particle swarm optimization with feasibility based rules for mixed-variable optimization problems[C]//4th International Conference on Innovative Computing,Information and Control,Kaohsiung,2009:897-903.
[19]Zhou N,Chen R S,Lin T,et al.Flexible power flow algorithm for distribution network including second-order items[C]//2nd International Conference on Sustainable Energy and Environmental Engineering,Shenzhen,2014:440-443.
[20]Finardi E C,Dasilva E L. A hybrid with cross-entropy method and sequential quadratic programming to solve economic load dispatch problem[J].IEEE Transactions on Power Systems,2006,21(2):835-844.
[21]Su C L.Probabilistic load-flow computation using point estimate method[J].IEEE Transactions on Power System,2005,20(4):1843-1852.
[22]武松辉.牵引系统中负序电流的计算与分析[D].南昌:南昌大学,2007.