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

Guangqian Ding; Feng Gao; Ruisheng Li; Bingxin Wu

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

Vol. 17, No. 1, pp. 294-304, Jan. 2017

10.6113/JPE.2019.17.1.294

Droop control

Islanding microgrid

PCC voltage compensation

Power sharing

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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.

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Cite this article

[IEEE Style]

G. Ding, F. Gao, R. Li, B. Wu, "A Communicationless PCC Voltage Compensation Using an Improved Droop Control Scheme in Islanding Microgrids," Journal of Power Electronics, vol. 17, no. 1, pp. 294-304, 2017. DOI: 10.6113/JPE.2019.17.1.294.

[ACM Style]

Guangqian Ding, Feng Gao, Ruisheng Li, and Bingxin Wu. 2017. A Communicationless PCC Voltage Compensation Using an Improved Droop Control Scheme in Islanding Microgrids. Journal of Power Electronics, 17, 1, (2017), 294-304. DOI: 10.6113/JPE.2019.17.1.294.