Development of the new polymer insulating materials for HVDC cable

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/61.141811· OSTI ID:7308399

Yoshifuji, N ^[1]; Niwa, T; Takahasi, T; Miyata, H ^[2]

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1. The Tokyo Electric Power Co., Inc., Tokyo (JP)
2. Fujikura Ltd., Tokyo (JP)

This paper relates to the new polymer insulating material for HVDC cable. The properties of modified HDPE, selected from various polymer materials by evaluations of DC characteristics were examined in both sheet and cable samples. It was found that the modification, which introduced a small amount of polar group into HDPE, considerably enhanced DC breakdown strength to as high as 1.5--2.0 times those of XLPE. Another evaluation was given with TSC method regarding space charge which was considered as a factor contributing to the enhancement of DC characteristics. Under a poling voltage of up to 30 KV/mm, the modified HDPE exhibits particular behaviors, with its space charge decreasing as stress is increasing. In addition, the additives in HDPE have a large influence on space charge characteristics, thereby affecting the DC breakdown strength. The evaluation of cable insulated with optimum modified HDPE was conducted to determine the breakdown strength under various voltage applications. Compared with the XLPE cable, modified HDPE cable exhibited excellent characteristics under all kinds of voltage applications (DC. ImP. polarity reversal, and DC + Imp), particularly DC dielectric breakdown strength which was almost twice that of XLPE.

• OSTI ID: 7308399
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States) Vol. 7:3; ISSN 0885-8977; ISSN ITPDE
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240100* -- Power Systems-- (1990-)
240202 -- Power System Networks
Transmission & Distribution-- DC Systems-- (1990-)
240301 -- Power Transmission Lines & Cables-- Power Cables-- (1990-)
36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
CABLES
CONDUCTOR DEVICES
DC SYSTEMS
DESIGN
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
EQUIPMENT
HVDC SYSTEMS
MATERIALS TESTING
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
PLANNING
POLYETHYLENES
POLYMERS
POLYOLEFINS
POWER SYSTEMS
SPACE CHARGE
TESTING