热老化对电压稳定剂改善交联聚乙烯绝缘性能的影响

doi:10.19595/j.cnki.1000-6753.tces.L90528

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Abstract In order to further improve the electrical performance of cross-linked polyethylene (XLPE), 1% m-aminobenzoic acid, selected as voltage stabilizer, was added into XLPE blend by a solution method, and accelerated thermal aging experiment was carried out on the sample. The electrical properties of the materials before and after adding voltage stabilizer and thermal aging were analyzed by space charge, conductivity and surface potential decay measurements. The influence of the voltage stabilizer and thermal aging on the trap was analyzed by the distribution of the electric field and trap energy levels. The results show that m-aminobenzoic acid can effectively inhibit the space charge accumulation in XLPE, improve the distribution of electric field inside the sample, and reduce the DC conductivity of the sample. After thermal aging, the space charge accumulation and electric field distortion were obvious, the rate of the potential decay decrease, and DC conductivity increase. It can be seen that the addition of voltage stabilizer led to the increase of the density of deep and shallow traps inside the sample, and improved the charge injection barrier. Thermal aging reduces the density of traps and deepens the depth of traps, resulting in the accumulation of space charge and obvious electric field distortion, thus reducing the electrical properties of materials.

Key words： Cross-linked polyethylene (XLPE) voltage stabilizer space charge DC conductivity trap level

Received: 15 July 2020

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	Articles by authors
	Hong Zelin
	Dai Chao
	Zhang Mengtian
	Li Xiujuan
	Chen Xiangrong

Cite this article:

Hong Zelin,Dai Chao,Zhang Mengtian等. Effect of Thermal Aging on Voltage Stabilizer to Enhance Insulation Properties of Cross-Linked Polyethylene[J]. Transactions of China Electrotechnical Society, 2021, 36(zk1): 8-13.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90528 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/Izk1/8

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