Security Assessment of Loop Closing Operation in 10kV Distribution Network Based on Probabilistic Load Flow

被引：0
|
作者：
Zhou Z. [1 ]
Zhang Y. [1 ]
Guo Q. [2 ]
Feng N. [2 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Shanghai Jiao Tong University, Ministry of Education, Minhang District, Shanghai
[2] Electric Power Research Institute of State Grid Shanghai Municipal Electric Power Company, Hongkou District, Shanghai
来源：
Dianwang Jishu/Power System Technology | 2019年 / 43卷 / 04期
关键词：
Loop closing operation; Probabilistic distribution of electric load; Probabilistic load flow; Security assessment;
D O I：
10.13335/j.1000-3673.pst.2018.1370
中图分类号：
学科分类号：
摘要：
Loop closing operation in distribution network may generate large current, affecting safety of power systems. In this paper, a security assessment method of loop closing operation in 10kV distribution network based on probabilistic load flow is proposed. Considering the probabilistic distribution of the electric loads on feeders, cumulant method is used to obtain the probabilistic distribution characteristics of loop closing steady-state current and transient impulse current. Security of loop closing operation in 10kV distribution network is assessed by calculating the over-limit probability and degree of loop closing current. In calculation of probabilistic load flow, this paper proposes a method to obtain the cumulants of input variables based on historical load data, overcoming the limitations of traditional numerical method. Finally, simulation is performed for a practical case of loop closing operation. Analysis results verify effectiveness, rapidity, and practicality of the proposed method. © 2019, Power System Technology Press. All right reserved.
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页码：1421 / 1429
页数：8
相关论文
共 17 条
  • [1] Chen X., Wang L., Li Y., Analysis of surge current due to closing loop in distribution grid, Electric Power Automation Equipment, 25, 4, pp. 40-42, (2005)
  • [2] Ye Q., Tang G., Wang L., Et al., Development and application of the analysis system for closed loop operation of distribution network, Automation of Electric Power Systems, 26, 22, pp. 66-69, (2002)
  • [3] Xiao B., Zhao L.-A., Zhang Y., Et al., Analysis and decision of loop closing operation in urban mid-voltage distribution network, Power System Protection and Control, 42, 16, pp. 133-138, (2014)
  • [4] Jiang H., Sun C., Jia Y., Et al., Transient analysis and simulation of surge current due to closing loop in 10 kV distribution network, Heilongjiang Electric Power, 33, 2, pp. 88-90, (2011)
  • [5] Chen T.H., Huang W.T., Gu J.C., Et al., Feasibility study of upgrading primary feeders from radial and open-loop to normally closed-loop arrangement, IEEE Transactions on Power Systems, 19, 3, pp. 1308-1316, (2004)
  • [6] Xuan K., Jia Y., Zhu H., Study on steady-state current due to closing loop in distribution net-work based on Ward/REI's equivalent, Journal of Northeast Dianli University, 31, 1, pp. 43-47, (2011)
  • [7] Zou J., Zhou G., Fu K., Et al., Electromagnetic loop closing calculation model and experimental analysis on 10 kV distribution network, Power System Protection and Control, 38, 8, pp. 144-148, (2010)
  • [8] Gan G., Wang Z., Li R., Et al., Methods and simplified formulas for calculating surge currents from loop closing in distribution networks, Automation of Electric Power Systems, 38, 20, pp. 115-120, (2014)
  • [9] Li X., Li X., Transient analysis and simulation of surge current due to closing loop in distribution network, Journal of Mechanical & Electrical Engineering, 27, 5, pp. 67-70, (2010)
  • [10] Ge S., Li X., Study on surge current due to closing loop in distribution network based on Thevenin's equivalent, Proceedings of the Chinese Society of Universities for Electric Power System and Automation, 19, 6, pp. 124-127, (2007)
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