基于复杂网络理论的配电网中性点接地方式可靠性影响研究
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摘要
中性点接地方式对配电网供电可靠性具有决定性的影响,然而传统的中性点接地方式对电网可靠性影响的研究均建立在停电次数和停电时间等指标基础上,缺乏对配电网拓扑结构因素考虑,针对此问题,根据复杂网络理论中的最短路径统计特性,对中性点接地方式对配电网的支路阻抗以及负荷分布等指标影响进行分析;并基于此指标,构建了配电网可靠性评价体系,根据此体系,利用现场数据,得到了不同中性点接地方式下的可靠性影响,为中性点接地方式的选择优化配电网络提供了有效的参考。
Neutral point grounding mode has a decisive influence on the reliability of distribution network power supply.However,the study of the influence of the traditional neutral point grounding mode on the reliability of the power grid is based on the indexes such as the number of blackouts and the time of power failure,which lacks the consideration of the topology of distribution network. Based on the shortest path statistical characteristics in complex network theory,this paper analyzes the influence of the neutral point grounding mode on the branch impedance and the load distribution of the distribution network,and the reliability evaluation system of distribution network is constructed. On the basis of this system,the reliability of the neutral point grounding mode is obtained by using the field data,which provides an effective reference for the selection and optimization of the neutral point grounding mode.
Neutral point grounding mode has a decisive influence on the reliability of distribution network power supply.However,the study of the influence of the traditional neutral point grounding mode on the reliability of the power grid is based on the indexes such as the number of blackouts and the time of power failure,which lacks the consideration of the topology of distribution network. Based on the shortest path statistical characteristics in complex network theory,this paper analyzes the influence of the neutral point grounding mode on the branch impedance and the load distribution of the distribution network,and the reliability evaluation system of distribution network is constructed. On the basis of this system,the reliability of the neutral point grounding mode is obtained by using the field data,which provides an effective reference for the selection and optimization of the neutral point grounding mode.
引文
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[6]王星华,潘高峰,彭显刚,等.基于复杂网络的含微网配电网结构输电效能评估指标研究[J].武汉理工大学学报,2013,35(4):136-140.Wang Xinghua,Pan Gaofeng,Peng Xiangang,et al. Complex network based transmission efficiency assessment for distribution system containing microgrid[J]. Journal of Wuhan University of Technology,2013,35(4):136-140.
[7] Araujo L R D,Penido D R R,Carneiro S,et al. A Study of Neutral Conductors and Grounding Impacts on the Load-Flow Solutions of Unbalanced Distribution Systems[J]. IEEE Transactions on Power Systems,2016,31(5):3684-3692.
[8] Wang P,Chen B,Tian C,et al. A Novel Neutral Electromagnetic Hybrid Flexible Grounding Method in Distribution Networks[J]. IEEE Transactions on Power Delivery,2017,32(3):1350-1358.
[9] Zhang B,He J,Jiang Y. Safety Performance of Large Grounding Grid With Fault Current Injected from Multiple Grounding Points[J]. IEEE Transactions on Industry Applications,2015,51(6):5116-5122.
[10]Zeng X,Yu K,Wang Y,et al. A novel single phase grounding fault protection scheme without threshold setting for neutral ineffectively earthed power systems[J]. Csee Journal of Power&Energy Systems,2016,2(3):73-81.
[2]郭丽伟,薛永端,徐丙垠,等.中性点接地方式对供电可靠性的影响分析[J].电网技术,2015,39(8):2340-2345.Guo Liwei,Xue Yongrui,Xu Bingyin,et al. Research on Effects of Neutral Grounding Modes on Power Supply Reliability in Distribution Networks[J]. Power System Technology,2015,39(8):2340-2345.
[3]刘健,张小庆,李品德,等.基于熄弧倍增原理的配电网单相接地故障处理[J].电网技术,2016,40(11):3586-3590.Liu Jian,Zhang Xiaoqing,Li Pinde,et al. A novel approach treating single-phase ground fault in distribution system[J]. Power System Technology,2016,40(11):3586-3590.
[4]王丙东,蔡蕾,董旭,等.中性点不接地系统非对称短路故障分析[J].电力系统保护与控制,2017,45(3):149-153.Wang Bingdong,Cai Lei,Dong Xu,et al. A comprehensive analysis for asymmetrical short-circuit fault of electric power system with neutralpoint unground[J]. Power System Protection and Control,2017,45(3):149-153.
[5]刘健,张小庆,李品德,等.基于熄弧倍增原理的配电网单相接地故障处理[J].电网技术,2016,40(11):3586-3590.Liu Jian,Zhang Xiaoqing,Li Pinde,et al. A novel approach treating single-phase ground fault in distribution system[J]. Power System Technology,2016,40(11):3586-3590.
[6]王星华,潘高峰,彭显刚,等.基于复杂网络的含微网配电网结构输电效能评估指标研究[J].武汉理工大学学报,2013,35(4):136-140.Wang Xinghua,Pan Gaofeng,Peng Xiangang,et al. Complex network based transmission efficiency assessment for distribution system containing microgrid[J]. Journal of Wuhan University of Technology,2013,35(4):136-140.
[7] Araujo L R D,Penido D R R,Carneiro S,et al. A Study of Neutral Conductors and Grounding Impacts on the Load-Flow Solutions of Unbalanced Distribution Systems[J]. IEEE Transactions on Power Systems,2016,31(5):3684-3692.
[8] Wang P,Chen B,Tian C,et al. A Novel Neutral Electromagnetic Hybrid Flexible Grounding Method in Distribution Networks[J]. IEEE Transactions on Power Delivery,2017,32(3):1350-1358.
[9] Zhang B,He J,Jiang Y. Safety Performance of Large Grounding Grid With Fault Current Injected from Multiple Grounding Points[J]. IEEE Transactions on Industry Applications,2015,51(6):5116-5122.
[10]Zeng X,Yu K,Wang Y,et al. A novel single phase grounding fault protection scheme without threshold setting for neutral ineffectively earthed power systems[J]. Csee Journal of Power&Energy Systems,2016,2(3):73-81.