Abstract
The ventilation system design of dry-type air-core reactor is a complex task that must determine the thermal loads to achieve the maximum insulation material exploitation. In this study, the temperature rise in reactor is due to Joule’s losses and heat dissipation by air convection, convection and radiation. The Joule’s losses calculated by coupled magnetic field-circuit analysis are used as the input for the thermal field by finite-element analysis, which is directly coupled with fluid analysis. Finally, the temperature distributions of reactor can be calculated. Therefore, the thermal performance analysis of air-core reactor could be conducted in the early design stage to guarantee the insulation material requirements.
Highlights
In power system, dry-type air-core reactor is employed to limit current, steady voltage and compensate reactive power
Accurate calculation of the temperature distribution is pivotal to the optimal design, which is a multiphysical coupled process that involves electromagnetic losses as well as fluid dynamic and thermal behavior
The average temperature rise of reactor was calculated by empirical formula (Wu et al, 1997)
Summary
Dry-type air-core reactor is employed to limit current, steady voltage and compensate reactive power. Accurate calculation of the temperature distribution is pivotal to the optimal design, which is a multiphysical coupled process that involves electromagnetic losses as well as fluid dynamic and thermal behavior. Thermal field was simulated by finite-element method (FEM) after calculating the heat transfer coefficient by using Nusselt number (Liu, 1991; Wu et al, 2002; Ho et al, 2006, 2007).
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