Maximum Allowable Intermittent Renewable Energy Source Penetration in Java-Bali Power System

The significant characteristic of renewable energy source especially solar and wind is intermittency. It could cause significant impact on power system stability and reliability. This study was conducted to estimate maximum allowable penetration of intermittent renewable energy source (IRES) where frequency and voltage must meet the stability and reliability requirement of the electric power system. The worst possible scenario that may occur in the system was used, such as penetration in weakest bus by sensitivity analysis, dry season, one time sudden loss of largest generator and IRES generation, and peak load and off-peak load condition. The result showed IRES penetration level into the Java-Bali power system using 2017 scenario in peak load is about 0.83% while in off-peak load is about 0.44% from total available generation in current condition without any action taken to compensate the penetration.