Loss evaluation for underground transmission and distribution cable systems

摘要

The design, manufacture and testing of crosslinked polyethylene (XLPE) cables for voltages of 245 kV and above are described. The operational reliability of a cable connection is decisively codetermined by the reliability of the cable accessories. The state-of-the-art and development trends regarding cable-sealing ends and cable joints are discussed in detail. Knowledge of the lifetime curve of XLPE (essential for designing reasonable qualification tests) is discussed, and test results which show that service stresses of 12-13 kV/mm can be realized are described. The design of accessories, especially joints and terminations for enclosed switchgears is addressed, and service experience is reported.