Theoretical and Experimental Evaluation of the Temperature Distribution in a Dry Type Air Core Smoothing Reactor of HVDC Station

• Main Authors: Yu Wang, Xiaoyue Chen, Zhuohong Pan, Hailiang Lu, Xishan Wen, Zhipeng Jiang, Bin Chen, Tuteng Chen
• Format: Article
• Language: English
• Published: MDPI AG 2017-05-01
• Series: Energies
• Subjects: dry-type air-core smoothing reactor (DASR); finite volume method (FVM); fluid-solid coupling; temperature field; ultra-high voltage (UHV)
• Online Access: http://www.mdpi.com/1996-1073/10/5/623

The outdoor ultra-high voltage (UHV) dry-type air-core smoothing reactors (DASR) of High Voltage Direct Current systems are equipped with a rain cover and an acoustic enclosure. To study the convective heat transfer between the DASR and the surrounding air, this paper presents a coupled model of the temperature and fluid field based on the structural features and cooling manner. The resistive losses of encapsulations calculated by finite element method (FEM) were used as heat sources in the thermal analysis. The steady fluid and thermal field of the 3-D reactor model were solved by the finite volume method (FVM), and the temperature distribution characteristics of the reactor were obtained. Subsequently, the axial and radial temperature distributions of encapsulation were investigated separately. Finally, an optical fiber temperature measurement scheme was used for an UHV DASR under natural convection conditions. Comparative analysis showed that the simulation results are in good agreement with the experimental data, which verifies the rationality and accuracy of the numerical calculation. These results can serve as a reference for the optimal design and maintenance of UHV DASRs.