Study of Synchronous Condenser Impact in Jawa-Madura-Bali System to Provide Ancillary Services

In recent years, the power grid trend is changing. The integration of renewable energy sources such as wind and photovoltaic into the existing grid is rapidly increasing. These global trends are expected to continue into the foreseeable future and could have a detrimental effect on grid performance. Problems in the grid will arise such as, reducing system inertia and reducing reactive power capacity. In many cases, these grid issues can be addressed with ancillary services. Presently in Indonesia, the necessity of reactive power and inertia were provide from conventional power plants by the state-owned company, PLN. The simulation in this paper will show the requirement of reactive power and system inertia from the synchronous condenser as ancillary services. The simulation is conducted on the Jawa-Madura-Bali System model, which is the most extensive system in the Indonesian power grid. The total capacity of photovoltaic and wind in the year 2025 is 1,430 MW, and the capacity of synchronous condensers as ancillary services is 2,152 MW in scattered locations. Synchronous condensers shift to a better voltage, and system stiffness will increase from 680 MW to 794 MW.