The key to realize ice-melting of long HV transmission lines by short-circuit method is to obtain a huge ice-melting power supply.

When high-voltage lines are parallel to or over-crossing pipelines,there should be a strong stray current in the pipelines,and as the distance of high-voltage line to pipelines becoms shorter,the stray current becomes stronger.

Combined with the practices related to rural grid reforming,the structure,installation,protection,operation and communication of reactive power compensator applied to high-voltage line are discussed,which can give a reference for device design and operation.

A new wireless way is put forward to detect phase for high voltage transmission lines indirectly.

This paper presents a fiber communication scheme applied to the current differential protection of the high voltage transmission line.

The structure and connection ways of failure j ud gment device in high voltage line are introduced.

Design on the lightning protection coverage of the lightning shield conductor for UHV transmission line;

Recently, UHV transmission line OPGW accidents, such as wire broken, fiber broken, tube perforation, water leakage, oil leak, hydrogen discharge, blowing out, signal interruption, etc.

Usually, the UHV transmission line is long and the phase-to-ground capacity and phase-to-phase capacity are big.