Analysis of Unbalanced Photovoltaic Systems Generation on Four-Wire Unbalance Distribution System of Shiraz

Subject Areas : Renewable energy

Hossein  Karimianfard ¹ (Islamic Azad university, Jahrom branch)
Hossein  Haghighat ² (communication and electrical dept, Islamic University, Jahrom Branch)

Received: 2019-04-11 Accepted : 2019-06-15 Published : 2019-08-06

Keywords: Photovoltaic cells, Four-wire unbalanced load flow, unbalanced distribution system,

Abstract :

The use of distributed energy resources in power grids and in particular in the distribution system has gained noticeable popularity and growth in recent years. Given the increasing use of solar energy resources in low voltage grids, an appropriate strategy to coordinate and control these resources is necessary in order to reduce annual grid energy losses and improve grid voltage profiles. In this paper, the optimization and coordination of local photovoltaic resources in a four-wire unbalanced low voltage distribution network is proposed and investigated for a given time horizon. The simulation is performed on a part of Shiraz low voltage network. Two scenarios are investigated: in the first scenario balanced output of three phase energy resources which are dispersed and uncontrolled, is considered. In the second scenario a situation is analyzed in which the output levels of these resources are unbalanced. The effect of these two scenarios on the annual energy losses of the network in question is thoroughly examined and discussed

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