Distributed Energy Resources (DER) Systems Integration into MV and LV Networks - Impact on Power Quality of the System

Abstract

The fast growing of Distributed Generation (DG) in European electricity networks, lead to challenges of different nature. Due the fast growth of market split of Distributed Energy Resources (DER), today's electric power system of centrally located generation, transmission networks and distribution networks is expected to evolve into a new configuration. The achievement of such drastic transformation will heavily rely on studies that evaluate the behaviour of networks with integrated DER systems. In particular, Power Quality (PQ) has been given significative attention due to the fact that new power system applications are more and more sensitive to power quality disturbances. The aim of this study is to examine the power quality behaviour of the network in case of integration of DER units at different locations of the MV and LV system. In order to analyse the impact of DG on the network's power quality, a 380 kV transmission system with MV, and LV subsystems, 10 kV and 0.4 kV respectively is used, DER units are integrated and power quality analyses are performed.

Optimal design and control implementation of unified power quality conditioner

“…Moreover, the placement of the renewable energy sources will influence the harmonic distortions in the system. If the renewable energy sources are connected at a low voltage level, the system harmonic distortions will be greater than that of a high voltage level [169], [170].…”