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One way to get more power out of the generator in a power plant is by implement a power uprating, however it is required design review especially for thermal characteristic of generator in order to prevent over heat and heat concentration point which can lead to the failure of insulation systems. In this study, thermal characteristics of 400 MW Generator due to power uprating had been analyzed using numerical simulation based on finite element. Case study was conducted on the generator of SURALAYA Coal Fired Power Plant in Indonesia based on the three conditions, i.e. existing condition, 5% and 7% uprating. Based on simulation results, the temperature distribution in the generator was able to be represented in detail in every segment where there was no indication of heat concentration point or hotspot on the generator. The increasing temperatures on winding due to the 5% and 7% uprating were respectively 29.9 oC and 31.1 oC by the largest error ± 3.33%.

Thermal Study for Power Uprating of 400 MW Generator Using Numerical Simulation