An Enhanced Emulated Inertia Control for Grid-Connected PV Systems with HESS in a Weak Grid

Ratnam Kamala Sarojini, Palanisamy Kaliannan, Yuvaraja Teekaraman, Srete Nikolovski and Hamid Reza Baghaee
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Ratnam Kamala Sarojini: Vellore Institute of Technology, School of Electrical Engineering, Vellore 632 014, Tamil Nadu, India
Palanisamy Kaliannan: Vellore Institute of Technology, School of Electrical Engineering, Vellore 632 014, Tamil Nadu, India
Yuvaraja Teekaraman: EVERGi-Sustainable Energy Communities, MOBI-Mobility, Logistics and Automotive Technology Research Centre, ETEC-Department of Electrical Engineering and Energy Technology, Faculty of Engineering, Vrije Universiteit Brussel, 1050 Brussel, Belgium
Srete Nikolovski: Power Engineering Department, Faculty of Electrical Engineering, Computer Science and Information Technology, University of Osijek, 31000 Osijek, Croatia
Hamid Reza Baghaee: Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15875–4413, Iran

Energies, 2021, vol. 14, issue 6, 1-19

Abstract: The role of renewable energy sources in the power grid is increasing tremendously. However, power electronic converters are used to incorporate RES into the grid without inertia. This article recommends an improved emulated inertia control approach focused on the frequency deviation and rate of change of frequency to enhance the inertia of a power system. The required inertial power calculated from emulated inertia control is delivered through hybrid energy storage systems equipped with a proper hybrid energy storage system control. The fast-varying power calculated from emulated inertia control is linked to super-capacitor. Simultaneously, the battery handles the slow varying power by regulating the DC bus voltage proportionate to the frequency variations. Further, the stability of the emulated inertia control and hybrid energy storage system controller is validated by Bode plots. The simulation results verified the correctness of the proposed emulated inertia control and hybrid energy storage system control. The real-time simulation results with the help of OPAL-RT are presented to validate the proposed method’s feasibility.

Keywords: inertia emulation; hybrid energy storage systems; frequency control; grid-connected PV; super-capacitor; battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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