Environmental And Economic Optimization For Distribution Power Grids With Soft Open Points, Solar-Based Distributed Generators, And Battery Energy Storage Systems

Abstract

Distribution electric grids (DEGs) are responsible for supplying electricity to consumers, making them a crucial component of the power system. Researchers have consistently focused on reducing the costs associated with purchasing electricity from DEGs. This study focuses on optimizing the placement and sizing of solar-based distributed generators (SDGs), soft open point (SOP), and battery energy storage systems (BESS) within the Nha Be 55-bus distribution electricity grid in Ho Chi Minh City, Vietnam, to reduce emission cost, fuel cost and the total cost of purchasing electricity from the grid. Equilibrium Optimizer (EO) is used to optimize the location and power output of SDGs, BESS, and SOP devices in two cases: In Case 1, five SDGs and one SOP device are simultaneously placed in the DEG by using the peak load at all buses. Case 2 uses the optimal location of five SDGs and one SOP in Case 1, optimizes the location of BESS, and optimally operates BESS and SOP to minimize the cost of purchasing electricity from the grid. The cost reduction for electricity purchasing is $353.5017, representing 65.53% for Case 1, and $3,897.7532, approximately 45%, for Case 2. The total emission cost can be reduced to 19,272 dollars for a 20-year operating period.  Therefore, utilizing SDGs, SOP, and BESS can increase the benefits for the distribution power grid.