Improving Transmission Reliability and Reducing Cost of Supply in Bangka Island through Sumatra-Bangka Interconnection: A Contingency Analysis Approach

In the distribution of electric power, the issue of distribution reliability is a very significant influence on the continuity of electricity distribution to the customer. Currently, Bangka Island’s electricity system is still dominated by diesel-fueled generators, resulting in the BPP (Cost of Supply) of the electric power system in the area being expensive. The Sumatra system in 2022 will experience a surplus of generation and there are many cheap generators, especially PLTU, so the Sumatra - Bangka interconnection option is something that must be done to reduce the BPP Bangka. The contingency analysis is conducted to evaluate the system’s ability to continue operating in the event of an unexpected failure or outage. The analysis considers various scenarios such as the loss of a generator, or transmission line. The results of the contingency analysis provide valuable information for system operators to develop effective contingency plans and make informed decisions during emergency situations. The study utilizes a combination of analytical and simulation methods to evaluate the system’s performance under normal and contingency conditions. The simulation model is developed using the power system simulation software to simulate various operating scenarios and contingencies. The analysis considers the system’s frequency response, voltage stability, and power flow characteristics. The findings of the study indicate that the Sumatra-Bangka system is highly interconnected, which makes it vulnerable to cascading failures. However, the system’s contingency analysis shows that it can withstand various contingencies with the proper contingency plans and procedures in place. The study recommends that system operators continue to monitor and evaluate the system’s performance regularly and develop contingency plans to maintain the stability and reliability of the power supply to the region.