Off-load tap-change transformer impact under high distributed PV generation

© 2017 IEEE. Distributed solar photovoltaic (PV) generation market continues to grow with increasing operational challenges for distribution network operators. In South Africa, residential solar PV system projects have also been implemented in low voltage distribution networks, and there are plans for future projects at municipal level. Residential solar PV growth introduces more technical and economic concerns in municipalities and electricity utility network operators. This paper focusses on a technical investigation of a more practical low voltage (LV) distribution transformer performance under high distributed solar PV connections on eThekwini Electricity distribution network. The main network parameters of interest investigated in this paper include LV network power flow, line voltage dynamics and distribution feeder power losses in steady state. Customer day load demand effects on network parameters are also analyzed, at discrete levels, with discrete off-load tap-changer positions and different solar PV penetration levels. A case study residential LV distribution network of eThekwini Electricity is used in this paper to assess central transformer performance

Impact of coordination of intertie transformer tap changers on active power losses assessed by Big Bang Big Crunch algorithm

Abstract: Power utilities worldwide face significant technical power losses. There are two categories of power losses: technical and non-technical losses. Technical losses occur on the transmission and distribution lines, transformer windings, and capacitors. These include active power losses which are caused by resistive components and reactive power losses which are caused by reactive components. Transformer tap changers play a key role in the minimization of power losses. Many researchers have already investigated the effect of transformer tap changers on power systems. However, none of their publications have assessed the impact of transformer tap changers on power flows in the context of interties to minimize active power losses using BBBC algorithm. The aim of this study is to assess the impact of intertie transformer tap changers on active power losses using BBBC algorithm...M.Phil. (Electrical Engineering in Power and Energy Systems

Techno-economic impact of single feeder: multiple microgrids on power utility companies.

Masters Degree. University of KwaZulu-Natal, Durban.Abstract available in the PDFList of Figures on page numbers ix-xi