A virtual impedance based grid emulator for the performance analysis of distributed generations

Nakul Narayanan, K and Umanand, L (2019) A virtual impedance based grid emulator for the performance analysis of distributed generations. In: 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019, 17 March 2019 - 21 March 2019, Anaheim, pp. 3013-3018.

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Abstract

This paper presents a virtual impedance-based grid emulation technique to evaluate the performance of distributed generations connected to a grid/micro-grid. A two-level voltage source converter (VSC) with an output LC filter is used to emulate the grid. In the emulation, the grid is represented as a voltage source behind a virtual series impedance, where the impedance can be an inductor, a resistor, a capacitor or a combination of all the three. A simple estimator based active damping technique is proposed to damp out oscillations associated with the output LC filter of the VSC. A detailed time domain analysis is carried out in PSCAD/EMTDC to study the transient response of the emulator. A hardware prototype is developed to verify the performance of the emulator experimentally.

Item Type:	Conference Paper
Publication:	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Distributed power generation; Passive filters; Power electronics; Transient analysis, Active damping; Hardware prototype; LC filter; Performance analysis; PSCAD/EMTDC; Virtual impedance; Voltage source; Voltage source converters, Time domain analysis
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	27 Dec 2022 04:50
Last Modified:	27 Dec 2022 04:50
URI:	https://eprints.iisc.ac.in/id/eprint/78561

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