2021 review
Impact of Transients Caused by PV Transformer Energization on Active Industrial Loads
[Review of ]. IETE TECHNICAL REVIEW, 38(4), 450–462.
author keywords: Active loads; conservation voltage reduction (CVR); DER issues; inrush; passivity; system modelling; transient analysis; volt-var optimization (VVO)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science)
Source: Web Of Science
Added: July 13, 2020
ABSTRACT The importance and impact of transient studies with appropriate distribution system modelling is highlighted in the present work. New and realistic modelling techniques to be employed in modern distribution system are presented. Various issues, arising due to the energization of photovoltaic (PV) transformer on active industrial loads in a distribution network, are modelled. Sudden energization of large PV plant transformer(s) with respect to the voltage, current, harmonic profile and their effect on the system impedance in a distribution network is dealt with as this impacts the network performance. Cause and effect for the tripping of the industrial plant drives post connection of the large transformers of the photovoltaic plant is investigated. The inverter-based loads are sensitive to the frequency response of grids which is shaped by power factor capacitors. The use of current-limiting resistors and strict constraints on system impedance is analysed and inferred to be the promising techniques for the stable operation of large industrial loads. Furthermore, the research work highlights the various other aspects to make the distribution system more efficient. Special cautions need to be followed if industrial loads are in the vicinity of the planned DERs. Hence, the need of modelling and simulation of transient-impact studies with appropriate frequency analysis prior to actual deployment of large-scale PV plants in “vital” load areas is essential.
