Study on Surface Charge Accumulation Characteristics of Resin Impregnated Paper Wall Bushing Core Under Positive DC Voltage

Ming Chen, Xuandong Liu, Chengjun Liang, Yi Zhao and Hao Tang
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Ming Chen: State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University, Xi’an 710049, China
Xuandong Liu: State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University, Xi’an 710049, China
Chengjun Liang: State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University, Xi’an 710049, China
Yi Zhao: State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University, Xi’an 710049, China
Hao Tang: China Electric Power Research Institute, Beijing 100192, China

Energies, 2019, vol. 12, issue 23, 1-14

Abstract: As a critical component of a high-voltage direct current (HVDC) transmission system, resin impregnated paper (RIP) wall bushing has become a weak point because of its surface charge accumulation. This paper studies a model RIP wall bushing core designed by the equal capacitance method. The stationary resistive field along the gas–solid interface of the RIP wall bushing core is investigated theoretically by a gas model, which considers the non-linearly field-dependent volume conductivity. The results show that the gas conductivity along the core surface tends to be an arched distribution from the high-voltage conductor to the end shielding screen. The surface charge mainly accumulates at the turning point of the radius, which may threaten the core’s insulation. Then, the surface charge is obtained through a measurement system, where the experimental results are highly consistent with the simulation results. Considering the time constant of charge dissipation is nearly 15 min, it would be better to measure the surface charge on one axial direction of RIP wall bushing core after each voltage application. The simulation and experimental results of this paper can guide the design of a RIP wall bushing core.

Keywords: high voltage direct current; wall bushing; resin impregnated paper; surface charge accumulation; surface charge measurement (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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