Comparative Analysis of Voltage Control in Battery Power Converters for Inverter-Based AC Microgrids

Woo-Kyu Chae, Jong-Nam Won, Hak-Ju Lee, Jae-Eon Kim and Jaehong Kim
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Woo-Kyu Chae: Research Institute, Korea Electric Power Corporation, Munji-ro 105, Yuseong-gu, Daejeon 34056, Korea
Jong-Nam Won: Research Institute, Korea Electric Power Corporation, Munji-ro 105, Yuseong-gu, Daejeon 34056, Korea
Hak-Ju Lee: Research Institute, Korea Electric Power Corporation, Munji-ro 105, Yuseong-gu, Daejeon 34056, Korea
Jae-Eon Kim: School of Electrical Engineering, Chungbuk National University, Chungbuk 361-763, Korea
Jaehong Kim: Department of Electrical Engineering, Chosun University, Pilmun-daero 309, Dong-gu, Gwangju 61452, Korea

Energies, 2016, vol. 9, issue 8, 1-18

Abstract: A microgrid is a micro-power system composed of local distributed generators, energy storage systems, loads, and other components in a local power network. Because renewable energy sources show relatively large output power variation, the integration of distributed generators in a microgrid often requires the installation of a large-scale energy storage system. The energy storage system is connected to a local AC bus via the DC/AC converter with an output inductor-capacitor (LC) filter. The energy storage system power converters generally form the local AC bus voltage. This grid-forming operation requires fast and robust voltage control to properly maintain a stable energy flow and high power quality in the local AC bus. In this paper, two major voltage control schemes—double-loop control and direct voltage control—are analytically compared, and their effects on the power quality of the microgrid are illustrated. The dynamic performance is compared through simulations and experimental results.

Keywords: distributed generators (DGs); microgrid; inverters; uninterruptable power supply (UPS); load sharing; battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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