Analysis of Capacity for Distributed Photovoltaic Power Station Accessing to Power Distribution Network in Central Tibet

Abstract

It’s very significant that the capacity of distributed photovoltaic power station accessing to power distribution network, during the designing, should meet the relevant requirements and take into the consideration the effect on the power flow of power distribution network and voltage deviation. According to the characteristics of the power distribution network grid structure in central Tibet, this paper builds the typical simulation model of the power distribution network and analyzes the effect on the power flow of distribution network and voltage deviation when the distributed photovoltaic power station accesses to 10KV power distribution network with adopting three plans respectively. The analysis reveals that (1) when adopting dedicated access with the installed capacity of 5.2MWp, the distributed photovoltaic power station has no effect on the power flow of distribution network and voltage deviation, (2) when adopting T access with the installed capacity of 1.5MWp, the power flow of distribution network changes and voltage deviation meet the related requirements, (3) when adopting the consumers side access with the installed capacity lower than 0.2MWp, has no effect on the power flow of distribution network and voltage deviation