مقاله انگلیسی رایگان در مورد تجزیه و تحلیل اثر COVID-19 بر بارهای مسکونی و ترانسفورماتورهای توزیع – الزویر ۲۰۲۱

This paper analyzes the impact of COVID-19 pandemic situation on residential loads and local distribution transformer. The transformers’ operating condition in terms of hottest winding temperature, top oil transformer, loss of life (%LOL) are analyzed considering different loads and harmonics content in the transformer currents. Based on these analyses, safe operating conditions of transformer are derived. Six types of consumers having different consumption patterns and different type of residential loads are considered for the analysis. In order to mitigate the adverse impacts of COVID-19 on loads and distribution transformer, the use of behind-the-meter (BTM) photovoltaic (PV) source, battery energy storage and electric vehicle, load scheduling, less utilization of loads that have distortion factors during office hours are proposed. A performance comparison has been made without and with considering the proposed BTM solution, load scheduling and loads having distortion factors. Simulation results show that, due to lockdown situation of COVID-19 issue, the residential loads consumptions increase during office hours and hence the local distribution transformer gets affected. Also, the proposed BTM solution, load scheduling and less utilization of loads having harmonic distortion can cope up with the increased energy consumptions during office hours.

I. INTRODUCTION

THE novel Corona virus (COVID-19) has impacted every aspect of human life not only in USA but also all over the world. The number of deaths due to COVID-19 has been piling up each day. Fig. 1 shows the COVID-19 statistics from March 2020 to October 27th 2020 in Shelby county, Memphis, Tennessee, USA [1]. Many states in USA have declared emergency and imposed orders to be in partial/fully lockdown conditions. In order to remain safe, people were forced to stay at home, work from home wherever possible and the educational institution, public places were closed in Memphis from March 24th, 2020. Because of people’s staying at home, the energy consumption patterns of residential buildings have changed. Specially, during the office hours, the load consumptions in buildings have increased dramatically. Fig. 2 shows the average load consumptions per half an hour of a house located at Memphis city for the consecutive two months (March and April 2020). The data indicates that significant amount of load consumptions increased during the office hours (specially from about noon to 6 pm) due to the lockdown situation in April 2020.