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

Abstract

Abstract-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 °C and 31.1 °C by the largest error ± 3.33%.

Ozone Transport in 311 MVA Hydrogenerator: Computational Fluid Dynamics Modelling of Three-Dimensional Electric Machine

“…At the lateral surface of the rotor, air velocity boundary conditions are applied to simulate the air angular and radial velocities at the lateral vicinity of the rotor, as detailed in [18]. Air angular velocity is, naturally, due the rotor revolutions.…”

“…Another knowledge field that plays a fundamental role in analysis of physics phenomena, and by consequence reducing costs of experimentation procedures and improving operation safety, is the realm of numerical modelling of hydrogenerators. Both two-and three-dimensional models have been developed in various areas of study [1,[17][18][19][20][21][22]. Those models employ the finite element method and encompass electromagnetic analysis [17,19], thermal analysis [18,20,21], and mechanical analysis [22].…”

“…Both two-and three-dimensional models have been developed in various areas of study [1,[17][18][19][20][21][22]. Those models employ the finite element method and encompass electromagnetic analysis [17,19], thermal analysis [18,20,21], and mechanical analysis [22]. In [18], a two-dimensional computational fluid dynamics (CFDs) model is incorporated into their thermal model.…”

“…Those models employ the finite element method and encompass electromagnetic analysis [17,19], thermal analysis [18,20,21], and mechanical analysis [22]. In [18], a two-dimensional computational fluid dynamics (CFDs) model is incorporated into their thermal model. To the best of our knowledge, there are currently no scientific papers that present a numerical model encompassing turbulent fluid dynamics for the entire 3D structure of a hydrogenerator.…”