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Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review

Electrical and Computer Systems Engineering (ECSE), School of Engineering, Monash University Malaysia, 47500 Subang Jaya, Selangor Darul Ehsan, Malaysia
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Appl. Sci. 2019, 9(24), 5300; https://doi.org/10.3390/app9245300
Received: 15 October 2019 / Revised: 21 November 2019 / Accepted: 22 November 2019 / Published: 5 December 2019
This study paper presents a comprehensive review of virtual inertia (VI)-based inverters in modern power systems. The transition from the synchronous generator (SG)-based conventional power generation to converter-based renewable energy sources (RES) deteriorates the frequency stability of the power system due to the intermittency of wind and photovoltaic (PV) generation. Unlike conventional power generation, the lack of rotational inertia becomes the main challenge to interface RES with the electrical grid via power electronic converters. In the past several years, researchers have addressed this issue by emulating the behavior of SG mathematically via pulse width modulation (PWM) controller linked to conventional inverter systems. These systems are technically known as VI-based inverters, which consist of virtual synchronous machine (VSM), virtual synchronous generator (VSG), and synchronverter. This paper provides an extensive insight into the latest development, application, challenges, and prospect of VI application, which is crucial for the transition to low-carbon power system. View Full-Text
Keywords: virtual inertia; renewable energy system; inverter; droop control; frequency stability; swing equation; grid angular frequency virtual inertia; renewable energy system; inverter; droop control; frequency stability; swing equation; grid angular frequency
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Yap, K.Y.; Sarimuthu, C.R.; Lim, J. .-Y. Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review. Appl. Sci. 2019, 9, 5300.

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