A novel method of frequency regulation in microgrid

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Title: A novel method of frequency regulation in microgrid
Authors: Bose, U
Chattopadhyay, SK
Chakraborty, C
Pal, BC
Item Type: Journal Article
Abstract: Owing to generation and demand mismatch, the frequency deviation and the rate of change of frequency (RoCoF) may become drastic at times in an islanded micro-grid. This is due to increased penetration of non-inertial renewable energy sources that brings down the system’s resilience to any kind of disturbance. Therefore, efficient control algorithms are required to mimic the inertial behavior of a conventional synchronous machine to arrest/limit any sudden change. This work focuses on frequency regulation of microgrid during transient condi- tions by means of fast-responding external energy reserve. The characteristics of a weak grid has been studied and simulated through modeling a Virtual Synchronous Machine (VSM). An inverter model is also developed to integrate the Energy Storage System (ESS) to the grid and a Double Second-Order Generalized Integrator Phase Locked Loop (DSOGI-PLL) is implemented that is capable of synchronizing the system under distorted and unbalanced situation. A new technique to estimate the frequency of the microgrid is reported. A simple proportional controller based approach for different level of pulsed power injection (using ultracapacitors and batteries) is proposed and simulated using MATLAB. Experimental demonstration is made using batteries only but with two different current-limits. The controller is implemented using dSPACE1103.
Issue Date: 1-Jan-2019
Date of Acceptance: 2-Aug-2018
URI: http://hdl.handle.net/10044/1/63257
ISSN: 0093-9994
Publisher: Institute of Electrical and Electronics Engineers
Journal / Book Title: IEEE Transactions on Industry Applications
Copyright Statement: This paper is embargoed until publication.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: J15119 - PO:500174140
Keywords: 08 Information And Computing Sciences
09 Engineering
Publication Status: Accepted
Embargo Date: publication subject to indefinite embargo
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering



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