Title: Stability analysis of selective inter-harmonic compensation approach for light flicker mitigation

Authors: Archana Sharma; Anshul Kumar Mishra; Bharat Singh Rajpurohit

Addresses: Department of Electrical Engineering, Rajkiya Engineering College Bijnor, Uttar Pradesh, 246725, India ' Rajkiya Engineering College Mainpuri, Uttar Pradesh, 205001, India ' Department of Electrical Engineering, Indian Institute of Technology Jodhpur, Karwar-342030, Jodhpur, Rajasthan, India

Abstract: In this paper, stability analysis of an approach for light flicker (LF) mitigation is proposed. Electric arc furnace (EAF) is one of the major sources of injecting inter-harmonics and contributing LF. Mathematical analysis of EAF current is done to determine the frequency components majourly responsible for LF. Based on the outcomes conventional control algorithm of static synchronous compensator (STATCOM) is modified to mitigate the inter-harmonics between frequency range 30Hz-70Hz, which gives advantage of capacity and capital savings. Although the proposed system reduces the flicker level Pst below 1 but it increases the system's order. In this work, stability analysis of proposed system with STATCOM is done to authenticate its practical implementation. Impedance-based small-signal modelling of the system is used to analyse the effect of current loop and voltage loop individually and together. The performance of system reveals that the proposed system is stable and can be used in practical applications.

Keywords: electric arc furnace; EAF; inter-harmonics; light flicker; LF; power quality; PQ; static synchronous compensator; STATCOM.

DOI: 10.1504/IJPELEC.2024.141513

International Journal of Power Electronics, 2024 Vol.20 No.2, pp.93 - 112

Received: 26 Oct 2023
Accepted: 10 Feb 2024
Published online: 19 Sep 2024 *

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