Flexible voltage controk in distribution networks with distributed generation - Modelling anlaysis and field trial comparison

The presence of distributed generation (DG) significantly changes the nature of a distribution network. The original design of distribution networks does not consider bi-directional power flow, voltage rise and other issues associated with the operation of DG. Consequently standard operational strategies are unable to deal with those challenges [2] and novel schemes are required. SuperTAPP n+ is one of the innovative voltage control schemes to support DG in the distribution networks [1, 3]. This scheme, based on estimation techniques, uses only local measurements to adjust the voltage target at the primary substation in order to optimise the voltage profile of the network and increase its ability to accommodate DG. This paper presents a SuperTAPP n+ trial and its outcome in part of the EDF Energy distribution network. The paper also demonstrates simulation software which allows planning engineers to determine whether a SuperTAPP n+ scheme could resolve voltage rise issues associated with the presence of DG or increase the amount of DG in a particular network. Results from both the simulation software and the SuperTAPP n+ field trial, presented in this paper, give an opportunity to validate the modelling process and software simulation tool as well as providing evidence of effectiveness of the scheme in distribution networks with DG. Finally, suitability of the SuperTAPP n+ scheme and its applications are discussed and detailed conclusions are presented.