Steady state voltage stability assessment method of distribution network considering inter-connection of distributed generators

被引：0
作者：
Zhang, Qian [1 ]
Liao, Qingfen [1 ]
Tang, Fei [1 ]
Xu, Junru [1 ]
Liu, Dichen [1 ]
Zou, Hongliang [2 ]
机构：
[1] School of Electrical Engineering, Wuhan University, Wuhan
[2] Taizhou Power Supply Company, State Grid Zhejiang Electric Power Company, Taizhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2015年 / 39卷 / 15期
关键词：
Distributed generators; Distribution network; Steady state voltage stability;
D O I：
10.7500/AEPS20150318012
中图分类号：
学科分类号：
摘要：
In order to study the impact of inter-connection of distributed generators (DGs) on steady state voltage stability of distribution network, the voltage stability index (VSI) capable of reflecting the degree of voltage stability of all load buses in distribution network is derived. A new load increase strategy for distribution network is proposed to quantitatively analyze the voltage stability of the weakest bus and the whole system. Causes of distribution network voltage collapse are discussed using PV curves, and the effects on steady state voltage stability in centralized and distributed inter-connection mode are compared when DG output varies dramatically. Furthermore, a voltage stability analysis method based on the calculation of VSI value of all buses is proposed to rapidly rank the voltage stability margin of load buses as well as accurately locate the weakest bus. Simulation results prove that rational location of DG inter-connection is expected to improve voltage stability of the entire network. ©2015 Automation of Electric Power Systems Press
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页码：42 / 48
页数：6
相关论文
共 21 条
  • [1] Wang S., Li X., Xiao Z., Et al., Multi-agent approach for service restoration of distribution system containing distributed generators, Automation of Electric Power Systems, 31, 10, pp. 61-64, (2007)
  • [2] Chou H.M., Butler-Purry K.L., Investigation of voltage stability in unbalanced distribution systems with DG using three-phase current injection based CPF, IEEE PES General Meeting, (2014)
  • [3] Wu X., Liu J., Bi P., Research on voltage stability of distribution networks, Power System Technology, 30, 24, pp. 31-35, (2006)
  • [4] Wang Z., Xia M., Lemmon M., Voltage stability of weak power distribution networks with inverter connected sources, American Control Conference, pp. 6577-6582, (2013)
  • [5] Zheng Y., Sun J., Zhang C., Et al., Study of voltage stability margin for the distribution network with electric vehicle integration, Transactions of China Electrotechnical Society, 29, 8, pp. 20-25, (2014)
  • [6] Liu M., Zhang B., Yao L., Et al., On-line voltage stability monitoring based on PMU and improved Thevenin equivalent model, Automation of Electric Power Systems, 33, 10, pp. 6-9, (2009)
  • [7] Wang Y., Liu Z., Tracking and estimation of system parameter using Thevenin's equivalent, Power System Technology, 24, 11, pp. 28-30, (2000)
  • [8] Li L., Yu J., Liu Z., Research on parameters drift problem in tracking Thevenin equivalent, Proceedings of the CSEE, 25, 20, pp. 1-5, (2005)
  • [9] Wang Y., Lu J., Li W., Et al., An equivalent model and voltage stability index based on local network voltage phasors, Proceedings of the CSEE, 28, 34, pp. 52-58, (2008)
  • [10] Liu B., Qi Z., Li B., Et al., On-line real-time voltage stability analysis based on feasible equilibrium solution region of branch power flow, Proceedings of the CSEE, 28, 10, pp. 63-67, (2008)
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