Investigation of performance degradation for TNB newly commissioned combined cycle power plant Case study at PD1, Tuanku Jaafar Power Station, Port Dickson

Phase 1 of Tuanku Jaafar Power Station, Port Dickson (PD1) is one of the newest power plants in Tenaga Nasional Berhad (TNB). This combined cycle plant with the nominal capacity of 750 MW started its commercial operation in 2005. However, in less than 2 years of its operation, the plant has indicated significant capacity degradation. Consequently, TNB carried few investigations to determine the cause for the capacity degradation. This paper describes the approach taken and the outcomes of the investigations.