Yuan Fating

Abstract: In this paper, a fluid‐thermal coupled finite element model is established to calculate the temperature rise of a dry type air‐core reactor, and it accuracy is verified by the experimental results obtained from a prototype. Taking the initial design parameters based on the equal height and the thermal flux design method, the detailed temperature field of the reactor is obtained both with and without the rain cover. It is shown that the maximum temperature rise of the inner encapsulations is different and higher after adding the rain cover. The reasons are given by analyzing the changes of the fluid velocity in the air ducts. In order to realize the same temperature rise and not more than the limit after adding the rain cover, two parameters of the rain cover are considered, which have five levels. The performance statistics analysis and optimal structure parameters of the rain cover are achieved. Meanwhile, a heat load optimization method is proposed for the inner encapsulations, and its correctness is validated by the temperature field simulation results. This is of great significance in guiding the thermal optimization of the reactor with rain cover. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

TL;DR: In this article, a fluid-thermal coupled finite element model is established based on the design method of equal height and heat flux, the detailed temperature field distribution results of air core reactor are obtained, it can be found that the innermost and outermost encapsulation temperature rise are lower compared with the inner encapsulation.

TL;DR: In this article, the basic structure and design parameters of an oil-immersed air core coupling reactor were given according to the interruption requirement of the 160 kV mechanical direct current circuit breaker, and a field-circuit coupled finite element model was established based on the ANSOFT simulation platform.

Abstract: In this paper, the geometry‐electromagnetic character, thermal condition of the coils, and encapsulation number are coupled in the optimization design of an air core reactor, to realize the minimum usage of metal conductor. Combined with the equality constraint conditions for maximum temperature rise conservation, inductance conservation, and structure function of the reactor, the optimization design curves and results are achieved based on the initial design parameters. According to the design results, the temperature field simulation model of the reactor is established, and the results verify the correctness of the optimization method. Compared with the design method of ‘equal height and heat flux’ and thermal‐electromagnetic character without considering the change of encapsulation number, the proportionality factor of metal conductor usage is 0.73 with the optimization method. It shows that the optimization method can significantly improve the utilization ratio of the conductor. Meanwhile, the influence of regularity on the electromagnetic efficiency, thermal efficiency, and other parameters is also obtained. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.