Effective Control Strategies for Islanded and Grid-Connected Modes of Operation in Microgrid

M. Sadees; K. Vijayakumar; J. Preetha Roselyn

doi:10.6180/jase.202210_25(5).0002

Effective Control Strategies for Islanded and Grid-Connected Modes of Operation in Microgrid

M. Sadees This email address is being protected from spambots. You need JavaScript enabled to view it.¹, K. Vijayakumar¹, and J. Preetha Roselyn¹

¹Department of Electrical and Electronics Engineering, SRMIST, Kattankulathur, Chengalpattu, 603203, Tamil Nadu, India

Received: November 1, 2021
Accepted: November 30, 2021
Publication Date: December 17, 2021

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202210_25(5).0002

ABSTRACT

The distributed renewable resources and loads in the microgrid are interconnected and act as a single controllable entity within a power grid, which can be operated either in grid-connected or islanded mode. This paper investigates a control algorithms to be implemented in different operating modes in a microgrid. The different control strategies like, Voltage/frequency (V/f) and Real-Reactive (PQ) power control are developed for the effective operation of microgrid. The controller for the interlinking converter in the microgrid has been developed and investigated. The effectiveness of the control strategy are also studied under transition states between the operating modes. With the implementation of the proposed V/f control and PQ control for the islanded and grid connected microgrid using IcosΦ algorithm for the inverter, the parameters like the real power, reactive power, dc bus voltage and voltage at the PCC are analyzed with and without controller. The proposed model is tested in an inverter fed microgrid setup in MATLAB simulink and the model is also validated in hardware prototype. The simulation results shows the proposed control strategy performs smooth transition under different modes of operation with minimized real and reactive power oscillations.

Keywords: Real Reactive power control, Voltage/frequency control, Icos current control algorithm, microgrid

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