High-voltage direct current power transmission grounding electrode with cooling system and temperature control system

Abstract

The invention discloses a high-voltage direct current power transmission grounding electrode with a cooling system and a temperature control system. The direct current power transmission grounding electrode comprises cavity conductors; insulation layers are laid on the inner walls of the cavity conductors; the direct current power transmission grounding electrode is connected with a water pump through a water hose, thus forming a water circulation system. A current transformer is mounted on the down lead of the direct current power transmission grounding electrode; a temperature sensor is mounted at the welding part of the direct current power transmission grounding electrode; the down lead of the direct current power transmission grounding electrode is composed of four cavity conductors; two cavity conductors are water inlet pipes; and the other two are water outlet pipes; the water pump, the current transformer and the temperature sensor are connected with a control device. According to the high-voltage direct current power transmission grounding electrode with the cooling system and the temperature control system, the system stability is improved; the errors resulting from manual operations are reduced; the intelligent level of the system can be improved; the real time operation data of the direct current grounding electrode can be obtained; the real time operation data is taken as the basis for controlling the work of the cooling system; the operation and maintenance intelligence is improved; and the manual operations are reduced.

Description

technical field [0001] The invention belongs to the field of grounding of a high-voltage direct current transmission system, in particular to a high-voltage direct current transmission grounding electrode with a cooling system and a temperature control system. Background technique [0002] The unbalanced geographical distribution of energy and load in my country has led to the trend of long-distance and large-scale energy transmission in my country. Although the proportion of DC transmission in the transmission system is smaller than that of AC transmission, UHV DC transmission has a large transmission capacity and long transmission distance. It has an irreplaceable position in the flow. With the vigorous development of UHV DC transmission projects in my country, the design of DC grounding electrodes is also more complicated. Due to the continuous increase of the voltage level of the DC transmission system and the increase of the common grounding electrode of the DC system...

AI Technical Summary

Problems solved by technology

Its disadvantages are: only its monitoring is considered, and its temperature rise cannot be dealt with automatically in time when a fault occurs. At the same time, most of the DC grounding electrodes in China are located in the outskirts of the country, far away from urban areas, and manual operation and maintenance are required. bring inconvenience

However, with the rapid development of UHV DC transmission projects, it is increasingly common for multiple DC systems to share ground electrodes. The design of the ground electrodes is more complicated, the current flowing through the ground electrodes continues to increase, and the heating problem of the ground electrodes always exists.

At present, the online monitoring system of the grounding electrode can only monitor its status, and cannot deal with the temperature rise in time. Although it can be solved by reducing the transmission power and cutting off the load, it will have a bad impact on the stability of the DC transmission system.

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