Inertia Response Improvement in AC Microgrids: A Fuzzy-Based Virtual Synchronous Generator Control | IEEE Journals & Magazine | IEEE Xplore

Inertia Response Improvement in AC Microgrids: A Fuzzy-Based Virtual Synchronous Generator Control


Abstract:

The absence of rotational masses from synchronous generators in converter-interfaced microgrids leads to a lack of inertia. Consequently, the system exhibits steeper freq...Show More

Abstract:

The absence of rotational masses from synchronous generators in converter-interfaced microgrids leads to a lack of inertia. Consequently, the system exhibits steeper frequency variations and higher frequency nadir, which may degrade the dynamic performance and challenge the operation of sensitive equipment such as protective relays in the grid. Virtual synchronous generator is introduced as an effective solution to increase the inertial response of converter interfaced renewable energy sources. This article proposed a fuzzy controller, which is augmented on the virtual synchronous generator topology to damp the perturbation during transients by increasing the inertia of the system. The proposed fuzzy control adds a correction term to the governor's output power that increases the system inertia during transients. In order to compare the inertial response improvement, a comparison between proposed fuzzy control technique and cost function based inertia and damping coefficient optimization is done on a virtual synchronous generator platform. It is shown that online measurement based adaptive methods have a better inertial response against other time-consuming techniques. To further verification, a number of experiments are done, which confirm the merits of the proposed fuzzy based virtual synchronous generator control method.
Published in: IEEE Transactions on Power Electronics ( Volume: 35, Issue: 4, April 2020)
Page(s): 4321 - 4331
Date of Publication: 26 August 2019

ISSN Information:

Funding Agency:


I. Introduction

Microgrids and their flexible control features propose a practical solution to employ better renewable energy resources by converter interface power electronics [1]. On the other hand, lack of synchronous generators in the converter interfaced microgrids (MGs) leave more operation-protection consequences. Though, low inertia of converter interfaced renewable energy sources (CIRESs) are introduced as a general drawback, they have fast controllable dynamics, which may be introduced as promising solutions for both power support and frequency response reaction [2].

References

References is not available for this document.