• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

Electric Power Construction ›› 2016, Vol. 37 ›› Issue (5): 2-9.doi: 10.3969/j.issn.1000-7229.2016.05.016

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

CHENG Lin1, WANG Xu1, HUANG Junhui2, LI Hu2, CHANG Yao1   

  1. 1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;2. State Grid Jiangsu Economic Research Institute, Nanjing 210009, China
  • Online:2016-05-01
  • Supported by:

    Project supported by  The National High Technology Research and Development of China (863 Program) (2015AA050102);National Natural Science Foundation of China(51177078)


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: