Live monitoring method and system for high-voltage direct current transmission lines

Abstract

The invention relates to a live monitoring method and a system for a high-voltage DC power transmission line. The method is characterized by comprising steps: 1) a line live monitoring system in the case of outage is built, 35kV voltage is loaded to the original power transmission line in the case of outage, the power transmission line can still operate lively in the outage period, the power transmission line can play a role of theft prevention, and the system after AC voltage loaded can operate stably in a no-load mode; 2) when a fault or an accident happens to the power transmission line, on one hand, voltage and current measurement data of the power transmission line are analyzed via a fault location system for fault location, and on the other hand, a protection tripping system of the power transmission line is started, the line is tripped, and the power transmission line is protected; and 3) in the case of outage of the power transmission line, a power supply for an AC station in a converter station is used for charging the positive electrode, the negative electrode and the grounding electrode of the power transmission line. Through building the line live monitoring system in the case of outage, the line can be monitored in real time, line facilities can be prevented from being stolen, overhaul and maintenance are convenient, and the management efficiency is high.

Description

technical field [0001] The invention relates to a live monitoring method and system for a high-voltage direct current transmission line. The utility model belongs to the technical field of high-voltage line monitoring equipment for direct current engineering. Background technique [0002] DC projects are usually used in long-distance, high-power transmission situations. In China, it is more common in my country to directly send electric energy from power centers in the west of China, such as large hydropower stations or large coal energy base power plants, to energy consumption centers in the east. When the electric energy of the power center is at a low ebb, such as when the hydropower station is in the dry season or the water shortage period, the DC converter station may stop supplying power during the rest period of the power transmission cycle. For example, in the upcoming multi-country DC interconnection project in Central Asia, the DC converter station will work for 5...

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a live monitoring method for high-voltage direct current transmission lines in order to solve the problems of difficulties in line maintenance, monitoring and management during the rest period of DC projects, and the problems that line facilities and equipment are easily stolen

[0007] The second purpose of the present invention is to provide a live monitoring system for high-voltage direct current transmission lines in order to solve the problems of difficulty in line maintenance, monitoring and management during the rest period of the DC project, and the problems that line facilities and equipment are easy to be stolen

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