Optimal Capacity and Location of PV Farms Penetration in 150 kV Bali Power System

Currently, the Indonesian government is highly concerned with the issue of transitioning from fossil energy to renewable energy. They are encouraging Indonesian State Electricity Corporation to build power plants with renewable energy and urging local governments to implement supporting programs related to this issue. Bali Island has the Kerthi Bali Economic Roadmap Towards a New Era in Bali: Green, Resilient, and Prosperous program, which aligns with the Indonesian government’s target, one of which is the construction of utility-scale photovoltaic farms (PVF) in Bali. The output of PVF is intermittent and tends to contribute active power; therefore, the issue of voltage fluctuations at the bus becomes a concern. The determination of the optimal location and capacity using the Particle Swarm Optimization method is carried out with network quality constraints and the objective of obtaining the best voltage profile. The optimization results from the all-bus scenario show the best voltage profile improvement compared to other scenarios. The optimal locations are at buses far from the existing thermal power plants. A total of 17 out of 19 buses are penetrated by PVF, each with different capacities, and the total capacity reaches 260 MW. This paper can serve as a recommendation for the installation of utility-scale PV in high voltage networks.