Study on the Relationship between Electron Transfer and Electrical Properties of XLPE/Modification SR under Polarity Reversal

Author:

Wu Zhi-Yuan1,Jin Yu-Zhi2,Shi Zhe-Xu1,Wang Zhi-Yuan1,Wang Wei1

Affiliation:

1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China

2. Northwest Branch of State Grid Corporation of China, Xi’an 710199, China

Abstract

The insulation of high-voltage direct-current (HVDC) cables experiences a short period of voltage polarity reversal when the power flow is adjusted, leading to sever field distortion in this situation. Consequently, improving the insulation performance of the composite insulation structure in these cables has become an urgent challenge. In this paper, SiC-SR (silicone rubber) and TiO2-SR nanocomposites were chosen for fabricating HVDC cable accessories. These nanocomposites were prepared using the solution blending method, and an electro-acoustic pulse (PEA) space charge test platform was established to explore the electron transfer mechanism. The space charge characteristics and field strength distribution of a double-layer dielectric composed of cross-linked polyethylene (XLPE) and nano-composite SR at different concentrations were studied during voltage polarity reversal. Additionally, a self-built breakdown platform for flake samples was established to explore the effect of the nanoparticle doping concentration on the breakdown field strength of double-layer composite media under polarity reversal. Therefore, a correlation was established between the micro electron transfer process and the macro electrical properties of polymers (XLPE/SR). The results show that optimal concentrations of nano-SiC and TiO2 particles introduce deep traps in the SR matrix, significantly inhibiting charge accumulation and electric field distortion at the interface, thereby effectively improving the dielectric strength of the double-layer polymers (XLPE/SR).

Funder

National Key Research and Development Project

Publisher

MDPI AG

Reference30 articles.

1. Research status of polyethylene insulation materials for high-voltage DC cables;Du;Trans. China Electrotech. Soc.,2019

2. Review of research progress on insulation materials for high-voltage DC cables;Zhao;High Volt. Eng.,2017

3. Research progress and key technology review of extruded high-voltage direct current cables;He;High Volt. Eng.,2015

4. Development and Application of Advanced AC/DC Transmission Technology in China;Tang;Proceeding CSEE,2016

5. Stress conditions in HVDC equipment and routes to in service failure;Morshuis;IEEE Trans. Dielectr. Electr. Insul.,2015

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