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http://dx.doi.org/10.6113/JPE.2017.17.1.294

A Communicationless PCC Voltage Compensation Using an Improved Droop Control Scheme in Islanding Microgrids  

Ding, Guangqian (Key Lab of Power System Intelligent Dispatch and Control, Shandong University, Ministry of Education)
Gao, Feng (Key Lab of Power System Intelligent Dispatch and Control, Shandong University, Ministry of Education)
Li, Ruisheng (XJ Group Corporation)
Wu, Bingxin (XJ Group Corporation)
Publication Information
Journal of Power Electronics / v.17, no.1, 2017 , pp. 294-304 More about this Journal
Abstract
This paper proposes a point of common coupling (PCC) voltage compensation method for islanding microgrids using an improved power sharing control scheme among distributed generators (DGs) without communication. The PCC voltage compensation algorithm is implemented in the droop control scheme to reduce the PCC voltage deviation produced by the droop controller itself and the voltage drop on the line impedance. The control scheme of each individual DG unit is designed to use only locally measured feedback variables and an obtained line impedance to calculate the PCC voltage. Therefore, traditional voltage measurement devices installed at the PCC as well as communication between the PCC and the DGs are not required. The proposed control scheme can maintain the PCC voltage amplitude within an allowed range even to some extent assuming inaccurate line impedance parameters. In addition, it can achieve proper power sharing in islanding microgrids. Experimental results obtained under accurate and inaccurate line impedances are presented to show the performance of the proposed control scheme in islanding microgrids.
Keywords
Droop control; Islanding microgrid; PCC voltage compensation; Power sharing;
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Times Cited By KSCI : 4  (Citation Analysis)
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