A SOLUTION FOR OPERATION OF MEDIUM VOLTAGE DISTRIBUTION NETWORKS WITH INTEGRATION OF DISTRIBUTED SOLAR PHOTOVOLTAICS

Abstract

The rapid development of small and medium-sized renewable energy sources such as solar power, wind turbine (collectively referred to as distributed power sources) connected to the power distribution grid has led to many impacts on the management and operation of the grid. One of the problems is that the power generated from these sources flows back towards intermediate stations (110 kV), leading to the risk of transformer overload and increased losses on the grid. The paper focuses on the reverse power flow phenomenon, calculation and analysis in different scenarios of distributed solar photovoltaics. The proposed grid restructuring solution shows feasibility in practice, loss reduction and voltage quality improvement to the grid. The results of the paper obtained from a specific medium-voltage grid will be a practical reference for distribution grid management and operation utilities.