交直流混合微电网网络坚强度评估的指标体系及方法
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摘要
网络坚强度是交直流混合微电网构建与运行的基础,可体现系统的容量、结构合理性以及抗干扰能力。在定义网络坚强度和描述其表现的基础上,提出了一套交直流混合微电网的网络坚强度评估指标体系。该体系基于系统对坚强度的需求层次,衍生出结构、容量、联络程度、备用大小和故障转移能力等相关指标,考虑了节点和支路的分布情况、节点和支路的供电能力以及交流和直流微网的容载比等因素。同时提出了可体现数据独立性和波动性的独立信息熵权法,并运用基于独立信息熵权-层次分析-主成分分析(independent information entropy-analytic hierarchy process-principal component analysis,IIE-AHP-PCA)的分层组合评价模型对网络坚强度进行评估。通过算例证明,所提出的指标体系与评价方法合理有效。
Network strength is the basis of construction and operation of hybrid AC/DC microgrid, reflecting system capacity, structure rationality and anti-interference ability. In this paper, based on definition of network strength and ability to describe performance, an index system of strength evaluation is proposed. Based on system demand level for the strength, the system covers indexes of topology, capacity, degrees of connection, reserve capacity and fault transfer capability. Distribution of nodes and branches, power supply of the nodes and branches, capacity-load ratio of AC and DC microgrids are considered. At the same time, an independent information entropy weighting method reflecting independence and volatility of the data is put forward. Hierarchical combination evaluation model based on IIE-AHP-PCA(independent information entropy-analytic hierarchy process-principal component analysis) is used to evaluate the network strength. A case study shows that the proposed index system and evaluation method is reasonable and effective.
Network strength is the basis of construction and operation of hybrid AC/DC microgrid, reflecting system capacity, structure rationality and anti-interference ability. In this paper, based on definition of network strength and ability to describe performance, an index system of strength evaluation is proposed. Based on system demand level for the strength, the system covers indexes of topology, capacity, degrees of connection, reserve capacity and fault transfer capability. Distribution of nodes and branches, power supply of the nodes and branches, capacity-load ratio of AC and DC microgrids are considered. At the same time, an independent information entropy weighting method reflecting independence and volatility of the data is put forward. Hierarchical combination evaluation model based on IIE-AHP-PCA(independent information entropy-analytic hierarchy process-principal component analysis) is used to evaluate the network strength. A case study shows that the proposed index system and evaluation method is reasonable and effective.
引文
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[16]段若晨,王丰华,顾承昱,等.采用改进层次分析法综合评估500k V输电线路防雷改造效果[J].高电压技术,2014,40(1):131-137.Duan Ruochen,Wang Fenghua,Gu Chengyu,et al.Comprehensive evaluation of 500k V transmission line lighting protection effect based on improved analytic hierarchy process[J].High Voltage Technology,2014,40(1):131-137(in Chinese).
[17]陈伟,夏建华.综合主、客观权重信息的最优组合赋权方法[J].数学的实践与认识,2007,37(1):17-22.Chen Wei,Xia Jianhua.The optimal combination weighting method of integrated subjective and objective weight information[J].Practice and Cognition of Mathematics,2007,37(1):17-22(in Chinese).
[18]李娜娜,何正友.组合赋权法在电能质量综合评估中的应用[J].电力系统保护与控制,2009,37(16):128-134.Li Nana,He Zhengyou.Combination weighting method for comprehensive evaluation of power quality[J].Power System Protection and Control,2009,37(16):128-134(in Chinese).
[19]杨小彬,李和明,尹忠东,等.基于层次分析法的配电网能效指标体系[J].电力系统自动化,2013,37(21):146-150.Yang Xiaobin,Li Heming,Yin Zhongdong,et al.Finite set optimal predictive control for neutral point clamped three-level grid-connected inverter[J].Automation of Electric Power Systems,2013,37(21):146-150(in Chinese).
[20]Papathanassiou S,Hatziargyriou N,Kai S.A benchmark low voltage microgrid network[C]//Proceedings of the CIGRE Symposium:Power Systems With Dispersed Generation.Athens:CIGRE,2005:1-8.
[2]Xu X,Mitra J,Wang T,et al.An evaluation strategy for microgrid reliability considering the effects of protection system[J].IEEE Transactions on Power Delivery,2015,PP(99):434-450.
[3]梁惠施,程林,苏剑.微网的成本效益分析[J].中国电机工程学报,2011,31(s1):38-44.Liang Huishi,Cheng Lin,Su Jian.Cost benefit analysis for microgrid[J].Proceedings of the CSEE,2011,31(s1):38-44(in Chinese).
[4]刘忠义,李庚银.混合型孤立微网全寿命周期经济性评估[J].现代电力,2015,32(4):1-7.Liu Zhongyi,Li Gengyin.Full life-cycle economic evalution of hybrid islated microgrid[J].Modern Electric Power,2015,32(4):1-7(in Chinese).
[5]李宏达.配电网网架坚强度评估研究[D].成都:西南交通大学,2013.
[6]潘智俊,张焰.城市电网结构坚强性评价的指标体系和方法[J].中国电机工程学报,2015,35(16):3999-4005.Pan Zhijun,Zhang Yan.Index system and method for structure strength assessment of urban power network[J].Proceedings of the CSEE,2015,35(16):3999-4005(in Chinese).
[7]韩哲,刘健,张志华.电力系统优化控制策略的鲁棒性评估[J].电网技术,2016,40(4):1204-1208.Han Zhe,Liu Jian,Zhang Zhihua.Robustness evaluation of optimal control strategy for electric power systems[J].Power System Technology,2016,40(4):1204-1208(in Chinese).
[8]杨文辉,毕天姝,黄少锋,等.基于电网生存性评估的关键线路识别方法[J].中国电机工程学报,2011,31(7):29-35.Yang Wenhui,Bi Tianshu,Huang Shaofeng,et al.An approach for critical lines identification based on the survivability of power grid[J].Proceedings of the CSEE,2011,31(7):29-35(in Chinese).
[9]杨丽徙,林茂盛,张宏伟,等.中压配电网典型网络结构抗毁性评估[J].电力系统自动化,2012,36(1):28-31.Yang Lixi,Lin Maosheng,Zhang Hongwei,et al.Invulnerability evaluation of typical network structure for medium voltage distribution networks[J].Automation of Electric Power System,2012,36(1):28-31(in Chinese).
[10]谭玉东.复杂电力系统脆弱性评估方法研究[D].长沙:湖南大学,2013.
[11]吴俊.复杂网络结构结构抗毁性研究[D].长沙:国防科学技术大学,2008.
[12]杨丽徙,曾新梅,方强华,等.基于抗毁性分析的中压配电网络结构结构[J].电力系统自动化,2013,37(8):65-69.Yang Lixi,Ceng Xinmei,Fang Qianghua,et al.Medium voltage distribution network topology based on survivability analysis[J].Automation of Electric Power Systems,2013,37(8):65-69(in Chinese).
[13]曾博,李英姿,刘宗歧,等.基于均衡主成分分析的智能配电网环境效益综合评价方法[J].电网技术,2016,40(2):396-404.Zeng Bo,Li Yingzi,Liu Zongqi,et al.Comprehensive evaluation method for environmental benefits of smart distribution network based on TO-PCA[J].Power System Technology,2016,40(2):396-404(in Chinese).
[14]俞立平,潘云涛,武夷山.一种新的客观赋权科技评价方法——独立信息数据波动赋权法DIDF[J].软科学,2010,24(11):32-37.Yu Liping,Pan Yuntao,Wuyishan.A new objective weighting method of sci-tec evaluation--independent information data fluctuation weighting method DIDF[J].Soft Science,2010,24(11):32-37(in Chinese).
[15]李刚,程砚秋,董霖哲,等.基尼系数客观赋权方法研究[J].管理评论,2014,26(1):12-22.Li Gang,Cheng Yanqiu,Dong Linzhe,et al.Study of the Gini coefficient objective weights[J].Management Review,2014,26(1):12-22(in Chinese).
[16]段若晨,王丰华,顾承昱,等.采用改进层次分析法综合评估500k V输电线路防雷改造效果[J].高电压技术,2014,40(1):131-137.Duan Ruochen,Wang Fenghua,Gu Chengyu,et al.Comprehensive evaluation of 500k V transmission line lighting protection effect based on improved analytic hierarchy process[J].High Voltage Technology,2014,40(1):131-137(in Chinese).
[17]陈伟,夏建华.综合主、客观权重信息的最优组合赋权方法[J].数学的实践与认识,2007,37(1):17-22.Chen Wei,Xia Jianhua.The optimal combination weighting method of integrated subjective and objective weight information[J].Practice and Cognition of Mathematics,2007,37(1):17-22(in Chinese).
[18]李娜娜,何正友.组合赋权法在电能质量综合评估中的应用[J].电力系统保护与控制,2009,37(16):128-134.Li Nana,He Zhengyou.Combination weighting method for comprehensive evaluation of power quality[J].Power System Protection and Control,2009,37(16):128-134(in Chinese).
[19]杨小彬,李和明,尹忠东,等.基于层次分析法的配电网能效指标体系[J].电力系统自动化,2013,37(21):146-150.Yang Xiaobin,Li Heming,Yin Zhongdong,et al.Finite set optimal predictive control for neutral point clamped three-level grid-connected inverter[J].Automation of Electric Power Systems,2013,37(21):146-150(in Chinese).
[20]Papathanassiou S,Hatziargyriou N,Kai S.A benchmark low voltage microgrid network[C]//Proceedings of the CIGRE Symposium:Power Systems With Dispersed Generation.Athens:CIGRE,2005:1-8.