Minimization of Power Loss and Voltage Deviation by Using Solar Distributed Generation

This paper discusses the integration of solar distributed generation (SDG) with distribution networks to reduce the active power loss and the voltage deviation as well. In order to solve the distribution networks a backward/forward sweep (BFS) load flow method is adopted using MATLAB coding. The optimal placement and size of the solar distributed generator is determined by using a repeated load flow method (RLF) over the system buses for the minimization of active power loss and the voltage deviation of the network. In the first mode, the SDG supplies only active power to the distribution network, such as photovoltaic (PV) source. In the second mode, the SDG supplies both active and reactive power such as inverter-controlled PV systems. The adopted method is applied to the 33-bus distribution networks. Also, loss sensitivity factors (LSF) has been used in order to select the most affective bus for the SDG P-type to be connected across it to reduce the power loss. Furthermore, based on loss sensitivity factors (LSF) the second SDG P-type will be allocated to support the same purpose as well. Also, the voltage deviation (VD) will be calculated before and after allocating the optimal SDG PQ-type to show its impact. From the obtained results, it is found that adding the SDG minimizes the total losses, the voltage deviation and improves the voltage profile of distribution networks.