Reliability Analysis of AC/DC Hybrid Distribution Network Based on Network Reconfiguration

doi:10.3969/j.issn.1000-7229.2016.05.016

Abstract

Abstract:

Traditional 10kV distribution network runs in the open-loop mode and the contact switch between regions is in cold standby state. If a transformer fault occurs, before the contact switch closes, the load is out of power. Meanwhile, the main transformer in substation is designed with large capacity, and the average load rate of the main transformer is low. Its a good solution to establish AC/DC hybrid distribution network by adding the multi-terminal flexible DC interconnection into the traditional 10kV AC distribution network. According to the characteristics of AC/DC hybrid distribution network, this paper proposes a new reliability evaluation method for AC/DC hybrid distribution network, in order to explore whether the transformer capacity redundancy can be reduced with keeping the reliability of the system. We construct the reliability model of multi-terminal flexible DC interconnection with considering the spare components, and adopt network reconfiguration to restore power to load with using branch exchange method during transformer fault. According to the reliability evaluation of a 10kV distribution network with multi-terminal flexible DC interconnection, the results prove that the reliability of distribution network increases after adding the multi-terminal flexible DC interconnection. Meanwhile, the results of the network reconfiguration prove that the designed capacity of the main transformer can decrease.

Key words: AC/DC hybrid distribution network, network reconfiguration, reliability, average load rate

CLC Number:

TM 732

CHENG Lin, WANG Xu, HUANG Junhui, LI Hu, CHANG Yao. Reliability Analysis of AC/DC Hybrid Distribution Network Based on Network Reconfiguration[J]. Electric Power Construction, 2016, 37(5): 2-9.

References

［1］VAN HERTEM D, GHANDHARI M. Multi-terminal VSC HVDC for the European Supergrid［J］. Renewable and Sustainable Energy Reviews, 2010, 14(9)：3156-3163.
［2］黄仁乐，程林，李洪涛.交直流混合主动配电网关键技术研究［J］.电力建设，2015，36(1)：46-51.
HUANG Renle, CHENG Lin, LI Hongtao. Research on key technology of AC/DC hybrid active distribution network［J］. Electric Power Constructure，2015，36(1)：46-51.
［3］黄华. 柔性直流输电在城市电网中应用的可行性［J］.电气技术，2011(8)：29-32.
HUANG hua. The application of VSC-HVDC in urban power grid ［J］. Electrical Engineering，2011(8)：29-32.
［4］曾嘉思，徐习东，赵宇明. 交直流配电网可靠性对比［J］.电网技术，2014，38（9）：2582-2589.
ZENG Jiasi, XU Xidong, ZHAO Yuming. Reliability comparision of AC and DC distribution network［J］. Power System Technology，2014，38（9）：2582-2589.
［5］马为民，吴芳劼，杨一鸣，等.柔性直流输电技术的现状及应用前景分析［J］.高电压技术，2014，40(8)：2429-2439.
MA Weimin, WU Fangjie, YANG Yiming, et al. Flexible HVDC transmission technology’s today and tomorrow ［J］.High Voltage Engineering，2014，40(8)：2429-2439.
［6］汤广福，罗湘，魏晓光. 多端直流输电与直流电网技术［J］.中国电机工程学报，2013，33（10）：8-17.
TANG Guangfu, LUO Xiang, WEI Xiaoguang. Multi-terminal HVDC and DC-grid technology［J］. Proceeding of the CSEE，2013，33（10）：8-17.
［7］丁明，李小燕，毕锐，等. 含VSC-HVDC的交直流混合发输电系统可靠性评估［J］.电网技术，2008，32(16):53-58.
DING Ming, LI Xiaoyan, BI Rui, et al. Reliability assessment of Hybrid AC/DC power system containing VSC-HVDC［J］. Power System Technology，2008，32(16)：53-58.
［8］丁明，王京景，宋倩.基于k/n(G)模型的柔性直流输电系统换流阀可靠性建模与冗余性分析［J］，电网技术，2008，32(21)：32-36，41.
DING Ming，WANG Jingjing，SONG Qian. Reliability modeling and redundancy analysis of converter values for VSC-HVDC power transmission system based on k-out-of-n: G model ［J］, Power System Technology，2008，32(21)：32-36，41.
［9］丁明，毕锐，王京景.基于FD法和模型组合的柔性直流输电可靠性评估［J］.电力系统保护与控制，2008,36(21):33-37.
DING Ming, BI Rui, WANG Jingjing. FD method and combined model for reliability assessment of HVDC flexible［J］. Power System Protection and Control，2008,36(21):33-37.
［10］孙宇斌，刘文霞，裘剑明，等.计及备用元件的柔性直流输电系统可靠性评估方法［J］.现代电力，2013,30(1):8-12.
SUN Yubin, LIU Wenxia, QIU Jianming, et al. The reliability evaluation method for VSC-HVDC system by considering of standby components［J］. Modern Electric Power，2013,30(1):8-12.
［11］任震，黄雯莹，冉立.高压直流输电可靠性评估［M］.北京：中国电力出版社，1996: 44-60.
［12］GREINER C J, LANGELAND T, SOLVIK J. Reliability evaluation of multi-terminal DC networks with DC circuit breakers［C］//IEEE Trondheim Power Tech. Trondheim，Norway：IEEE，2011: 1-8.
［13］XIE Kaigui, CAO Kan, YU D C. Reliability evaluation of electrical distribution network containing multiple overhead feeders on a same tower［J］. IEEE Transactions on Power Systems，2011，26(4)：2518-2525.
［14］WANG Z, SHOKOOH F, QIU J. An efficient algorithm for assessing reliability indexes of general distribution systems［J］. IEEE Transactions on Power Systems, 2002, 17(3)：608-614.
［15］程林，何剑.电力系统可靠性原理和应用［M］.北京：清华大学出版社，2015：320-333.
［16］谢翔，袁越，李振杰.含微网的新型配电网供电可靠性分析［J］.电力系统自动化，2011，35（9）：67-72.
XIE Xiang, YUAN Yue, LI Zhenjie, Reliability analysis of a novel distribution network with microgrid［J］. Automation of Electric Power Systems, 2011，35（9）：67-72.
［17］王守相，王成山.现代配电系统分析［M］.北京：高等教育出版社，2014：193-196.
［18］GUO Jingli, WANG Xiuli, BIE Zhaohong, et al. Reliability modeling and evaluation of VSC-HVDC transmission systems［C］//PES General Meeting/Conference & Exposition. Washington, USA：IEEE, 2014.
［19］GUPTA N, SWARN A, NIAZI K R. A modified branch-exchange heuristic algorithm for large-scale distribution networks reconfiguration［C］//2012 Power and Energy Society General Meeting. San Diego, USA: IEEE, 2012.

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