Influence of PV plant 1 MWp connected on MV overhead line on voltage quality in PCC – case study

Abstract

This paper analyses influence of PV plant with great power on MV grid rated voltage 10 kV, considering voltage quality parameters. PV plant is connected on MV overhead line feeding rural customers (ACSR conductors). Point of common coupling (PCC) has relatively low value (weak grid). According to EN 50160:2011, measurement is performed in PCC point. Analysis and comparison of results before and after PV plant connection is performed. These measurements are necessity, so that potentially negative influence of PV plant on distribution grid can be seen. Obtain results of voltage quality parameters are compared with EN 50160:2011 limit values. Further, general impact of PV plant on distribution grid in PCC was analysed. Specificity of this paper is that analyzed PV plant is with great power and connected on MV weak grid. This PV plant is one of only few connected on MV grid in Bosnia and Herzegovina.