Simulation and Suppression Measure Analysis of Electromagnetic Radiation Interference Due to Frequency Converters in Coal Mines

Zhonghua Xin, Huijuan Wang, Longpeng Sui, Yujia Lu, Xiaodong Zhang and Rui Chen ()
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Zhonghua Xin: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Huijuan Wang: Shuozhou Power Supply Company, State Grid Shanxi Electric Power Company, Shuozhou 036000, China
Longpeng Sui: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Yujia Lu: Transportation Technology Research Institute, CHN Energy Group, Beijing 100089, China
Xiaodong Zhang: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Rui Chen: School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

Energies, 2024, vol. 17, issue 13, 1-17

Abstract: Nowadays, due to their characteristics of high efficiency and energy saving, frequency converters are used in coal mine excavation machines and ventilation machines. They can cause serious electromagnetic radiation interference with the surrounding monitoring, sensing and other equipment. Therefore, it is necessary to explore the electromagnetic interference characteristics of mining converters. By choosing a ZJT-75/660SF mine frequency converter as the research object, an antenna model was established, and the method of moments was used to solve the problem. The electromagnetic radiation characteristics of the frequency converter were analyzed, and a field experiment was conducted to verify the effectiveness of the model by comparing the simulation and experimental data. According to the analysis of the electromagnetic intensity distribution characteristics of the near field and far field, the near-field intensity is concentrated in the inner part of the converter, but the far-field intensity has obvious directional characteristics, which are found to provide a reference value for the location of the underground mining converter. Finally, a method is proposed to improve electromagnetic radiation disturbance by changing the structure of the converter’s heat dissipation hole, and the feasibility of this method is verified.

Keywords: frequency converter; electromagnetic radiation interference; method of moments; antenna model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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