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Key Problem Research of 110kV XLPE Super-clean Cable Materials

Author: WangPingPing
Tutor: ZhaoHong
School: Harbin University of Science and Technology
Course: High Voltage and Insulation Technology
Keywords: XLPE Ultra - clean cable material Rheological properties Space charge
CLC: TM247
Type: Master's thesis
Year: 2009
Downloads: 221
Quote: 2
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Abstract


110kV and above voltage class ultra-clean cross-linked polyethylene cable annual consumption is about 4,000 tons, and the rate of growth of 10% . But the ability to manufacture such ultra-clean cross-linked polyethylene cable materials mainly U.S. TOW chemical and Borealis two giant petrochemical multinationals , thus achieving ultra-clean cross-linked polyethylene cable materials made ??significant economic and social benefits . Domestic 35kV cross-linked polyethylene cable insulation material production technology gradually mature and the impurity detection technology improve ultra-clean cable material localization possible. The base resin choose is a key part of the development of the 110kV ultra-clean cross-linked polyethylene cable materials , resin flow and space charge characteristics are important factors that affect the processing performance and aging properties of crosslinked polyethylene . The paper selects four kinds of domestic low-density polyethylene resin used in the production of cross-linked polyethylene cable materials and imported cross-linked polyethylene cable comparative study . Rheological properties are not selected several domestic low-density polyethylene material temperature 125 ° C and imports of cross-linked polyethylene cable materials , domestic resin flow at 160 ℃ and imported by capillary rheometer extrusion experiments confirmed the flow of material at 125 ℃ proximity . Dicumyl peroxide crosslinking agent , use of soaking Preparation of cross-linked polyethylene . Polyethylene and crosslinked polyethylene sample is placed in a vacuum oven (353K) annealing treatment for 2 hours, 24 hours, 48 ??hours and 72 hours after the application of electro-acoustic pulse method test of each sample space charge distribution . The results show that crosslinked polyethylene sample annealed for 2 hours in the main different polarity charge ; crosslinked polyethylene sample after a 24 - hour annealing process isobutyl charged polar gradually decreased or disappeared , the injected charge of the same polarity . ; polyethylene sample in the space charge of the same polarity charge was injected and its distribution are substantially independent of the influence of the annealing time .

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CLC: > Industrial Technology > Electrotechnical > Electrical materials > Conductive materials and their products > Power cable
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