A control strategy for the distributed energy storage system for a DC distribution power network

doi:10.12028/j.issn.2095-4239.2019.0017

Energy Storage Science and Technology ›› 2019, Vol. 8 ›› Issue (4): 654-658.doi: 10.12028/j.issn.2095-4239.2019.0017

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A control strategy for the distributed energy storage system for a DC distribution power network

SHI Changli^1,2, WEI Tongzheng^1,2, HUO Qunhai^1,2, HE Junqiang^1,2, ZHANG Tongshuo¹

1 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100190, China

Received:2019-02-25 Revised:2019-04-09 Online:2019-07-01 Published:2019-07-01

Abstract

Abstract: When the voltage type droop control strategy is adopted in a distributed energy storage system for a DC distribution network, the degree of coupling between all the distributed energy storage units becomes very high, which is easily affected by the impedance of the line, and hence poor effect of current sharing. This paper proposes a current type droop control strategy, analyses the calculation method of key control parameters, and the decoupling of the line impedance between all the units of the distributed energy storage system. The experimental results verify the effectiveness of the proposed control strategy.

Key words: distributed energy storage system, line impedance, impedance decoupling, current droop control strategy

CLC Number:

TQ028.8

SHI Changli, WEI Tongzheng, HUO Qunhai, HE Junqiang, ZHANG Tongshuo. A control strategy for the distributed energy storage system for a DC distribution power network[J]. Energy Storage Science and Technology, 2019, 8(4): 654-658.

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A control strategy for the distributed energy storage system for a DC distribution power network

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