INTEGRATION OF GAS PIPING SYSTEM TO INCREASE RELIABILITY AND COST REDUCTION

Muara Tawar power station has three gas suppliers i.e. PGN, Pertamina EP (PEP) and Nusantara Regas (NR). For gas supply from PGN and PEP, supplied pressure is still below the minimum requirement of GT, hence the additional gas booster (compressor) is used to increase pressure. PT PJB uses compression services by 3rd parties related to the work. The compression service used to backing up pressurized gas supply to Block 1-4, while block 5 has its own compressor unit. There are 5 gas supply streams leading to GT, 1 & 2 phase compressors (managed by 3rd parties), V-block, CNG and NR gas compressors. Gas turbines operation pattern in Muara Tawar power plant are fluctuate because of demand fluctuations in Java and Bali. Start-up plant priority per blocks are sequentially start from block 1 (3 units), block 3-4 (6 units), block 2 (2 units) and the last block 5. With different operating priorities, and unintegrated pressurized gas distribution conditions of stream, can result in shortage of pressurized gas supply in one block. In order to maintain the reliability of the unit and optimizing the absorption of fuel gas related to the problem, Muara Tawar power plant make an improvement in "Integration of Gas Pipe to Maintain Unit Reliability and BPP Reduction". From this research, it can be conclude that integration of piping system have capability to increase the reliability of the gas supply to the turbine gas unit.