Impacts of reactive power and harmonics on LV network losses
conference contributionposted on 14.06.2019 by Andrew Urquhart, Murray Thomson, Christopher Harrap
Any type of content contributed to an academic conference, such as papers, presentations, lectures or proceedings.
Reactive power and harmonics have been proposed as key factors contributing to losses on LV networks. This paper describes measurements of reactive power phase displacement and harmonic distortion over a large number of LV feeders, demonstrating that low power factors mostly arise when the demand is lowest. Loss calculations for a set of eleven feeders show that distortion has a low impact, less than 10% of the loss power and near zero for feeders with higher losses. Phase displacement can significantly increase losses, particularly for commercial LV feeders. In one example, power factor correction would reduce losses by up to 36%.
This work has been funded by Western Power Distribution, though Ofgem’s Network Innovation Allowance project “Losses Investigation”.
- Mechanical, Electrical and Manufacturing Engineering