A Review on Hierarchical Control of AC Microgrids
Authors: Bishal Rijal, Kanchan Bomzon, Rijan Dahal, Sujan Adhikari
Abstract—Microgrid consists of distributed generators, energy storage devices, power electronic converters and loads. With increasing number of distributed generators and loads, control of microgrid becomes challenging. Researchers proposed hierarchical control of AC microgrid which has certain degree of decentralized and centralized control. The hierarchical control is composed of primary, secondary and tertiary control. Primary control involves power sharing among the distributed generators of microgrids which is achieved through droop control mechanism. It ensures the distributed generators to plug and play features. The major drawback of primary droop control is the AC bus voltage and frequency deviation which can be restored through the use of secondary control mechanism. Secondary control involves the system voltage and frequency restoration. The tertiary control is utilized in order to control the flow of power between the microgrid and the utility grid. A review of different control techniques in primary, secondary and tertiary control is addressed in this paper.
Keywords: AC microgrid, Distributed generators, Droop control, Hierarchical control
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Published In: International Conference on Role of Energy for Sustainable Social Development in ‘New Normal’ Era (RESSD-2020)
Date of Conference: 28th-29th December 2020
Conference Location: Kathmandu, Nepal
Publisher: IEEE Power and Energy Society Nepal Chapter
Cite the paper as:
B. Rijal, K. Bomzon, R. Dahal, S. Adhikari, A Review on Hierarchical Control of AC Microgrids, International Conference on Role of Energy for Sustainable Social Development in ‘New Normal’ Era, 28th-29th December 2020, Kathmandu, Nepal