NDLI: Decentralised primary and secondary control strategies for islanded microgrids considering energy storage systems characteristics

Content Provider	IET Digital Library
Author	Arani, Ali Asghar Khodadoost Gharehpetian, Gevork B. Abedi, Mehrdad
Abstract	One of the main subjects of Microgrid (MG) islanded operation is its stability. Using the Energy Storage Systems (ESSs) in MGs, the stability can be improved. To ensure the proper operation of the ESSs, their State of Charge (SoC) should be monitored and controlled. In this paper, a new decentralized control method based on the conventional droop method is proposed which considers different types of ESSs used in islanded MG, i.e. ESSs with high power density and high energy density. In the proposed method, the ESS units are divided into two main categories. The master ESS is the main primary frequency control unit and the other ESSs respond to active and reactive power variations of the load and participate in the secondary control of frequency. For each of these categories, a new control method is proposed. The proposed method, including the primary and secondary control, is decentralized, and based on local measurements. Moreover, in the proposed method, a SoC equalization of ESSs is considered. To assess the stability of the MG, a small signal stability model is developed. Three scenarios are simulated to verify the effectiveness of the proposed method in MG frequency control and ESSs SoC balancing.
Starting Page	2986
Ending Page	2992
Page Count	7
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 14, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0362
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-05-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Power Variations Control of Electric Power System Conventional Droop Method Decentralised Control Decentralised Primary Control Strategy Decentralised Secondary Control Strategy Decentralized Control Method Distributed Power Generation Energy Storage Energy Storage System Characteristic ESS SoC Balancing ESS Units Frequency Control High Energy Density High Power Density Islanded Microgrid Main Categories Main Primary Frequency Control Unit MG Frequency Control Microgrid Islanded Operation Multivariable Control System Power Distribution Control Power Distribution Fault Power Generation Control Power System Control Proper Operation Reactive Power Variations Small Signal Stability Model State of Charge
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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