http://www.iaeme.com/IJARET/index.asp 759 editor@iaeme.com International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 12, Issue 3, March 2021, pp.759-765 Article ID: IJARET_12_03_070 Available online at http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=12&IType=3 ISSN Print: 0976-6480 and ISSN Online: 0976-6499 DOI: 10.34218/IJARET.12.3.2021.070 © IAEME Publication Scopus Indexed VOLTAGE SAG PROPAGATION UNDER FAULT IMPEDANCE DURING DOUBLE LINE TO GROUND FAULT ON LOW VOLTAGE DISTRIBUTION NETWORK *Mohsin Ali Koondhar, Abdul Khalique Junejo, Munawar Ayaz Memon and Riaz Hussain Memon Department of Electrical Engineering, Quaid-e-Awam University of Engineering, Science and Technology Nawabshah, Pakistan *Corresponding Author ABSTRACT The voltage-sag propagation (VSP)is main issue of the power quality, which must be analyzed on different scenarios. In this paper VSP is checked during double line to ground fault under different fault impedance for distribution power network. Firstly, Mathematical modeling under symmetrical components has been done for un-balanced voltage then sequence analyzer is adopted to check different levels of voltage under un- healthy network. Secondly, the whole distribution network for double line to ground fault is adopted to check the VSP, which propagate from primary to secondary side of the transformer. In last, the VSP is visualized on different fault impedance. The simulation results can demonstrate that the voltage sag (VS) amplitude would be smaller under fault impedance and phase shift can be observed on secondary of the transformer. Key words: Voltage Sag, fault impedance, sequence component, double line to ground fault and power quality. Cite this Article: Mohsin Ali Koondhar, Abdul Khalique Junejo, Munawar Ayaz Memon and Riaz Hussain Memon, Voltage Sag Propagation Under Fault Impedance During Double Line to Ground Fault on Low Voltage Distribution Network, International Journal of Advanced Research in Engineering and Technology (IJARET), 12(3), 2021, pp. 759-765. http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=12&IType=3 1. INTRODUCTION Power quality (PQ) is an important issue in electrical systems [1]. The power distribution system network provides consumers with voltage [2-4]. Every user hopes to have a constant voltage, that is, a sine waveform with a fixed frequency generated in a power plant, but