Maximum Capacity of Grid-Connected Distributed Generation in AC/DC Hybrid Distribution Network

doi:10.3969/j.issn.1000-7229.2019.10.009

Abstract

Abstract: The proportion of distributed generation（DG） in the distribution network is continuously increasing， which has a certain impact on the normal operation of distribution network. It is necessary to evaluate the maximum access capacity of the distributed generation. The operation mode of AC/DC hybrid distribution network is more flexible than the traditional AC distribution network. The AC/DC hybrid distribution network has a larger acceptability of the distributed generation and it is the development trend of the distribution network in the future. This paper constructs the maximum capacity evaluation model of distributed generation for AC/DC hybrid distribution network on the basis of Distflow power flow constraint， and then the second-order cone relaxation technique is used to deal with the non-convex and nonlinear constraints in the model. The model is transformed into a solvable mixed integer second-order cone programming model to be solved. Finally， the effectiveness of the model is tested in a 94-node distribution system. The maximum access capacity of the distributed generation and the corresponding influencing factors of the AC distribution network and the AC/DC hybrid distribution network are also analyzed. The results show that the maximum access capacity of the distributed generation in AC/DC hybrid distribution network is larger than that of the traditional AC distribution network.

Key words: AC/DC hybrid distribution network, mixed integer second-order cone programming, distributed generation（DG）, maximum access capacity

CLC Number:

TM 715

HUANG He，GAO Song，HAN Jun，SUN Qirun，WU Zhi，GU Wei. Maximum Capacity of Grid-Connected Distributed Generation in AC/DC Hybrid Distribution Network[J]. Electric Power Construction, 2019, 40(10): 75-83.

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