Wiring method for realizing direct-current deicing of ground wire of converter station

Abstract

The invention discloses a wiring method for realizing the direct-current deicing of a ground wire of a converter station, relates to a direct-current deicing technique of a power grid transmission line, and aims at providing a method for effectively reducing the equivalent resistance of the ground wire to be deiced. The technical points of the wiring method are as follows: the wiring method comprises a step of carrying out all-insulation transformation on the ground wire to be deiced, and retaining one grounding point at most after the all-insulation transformation; a step of dividing the ground wire into n sections, wherein each section of the ground wire comprises one ground wire or at least ground wires which are parallel to each other and two ends of which are aligned; a step of connecting one ends of all ground wires belonging to one same ground wire section by means of short circuits so as to be used as one end of the ground wire section, and connecting the other ends of all ground wires belonging to one same ground wire section by means of circuit boards so as to be used as the other end of the ground wire section; a step of connecting one ends of all the ground wire sections with a lead I and connecting the other ends of all the ground wire sections with a lead II; a step of connecting an output access point of a direct-current deicing device with the lead I; a step of connecting the output access point of the direct-current deicing device with the lead II, etc.

Description

technical field [0001] The invention relates to a DC ice-melting technology for power grid transmission lines, in particular to a wiring method for realizing DC ice-melting of a ground line of a converter station. Background technique [0002] The threat of ice disaster has always been a major technical problem that the power system industry is struggling to deal with. In recent years, with changes in global climate conditions, low-temperature, rainy, snowy and freezing weather has frequently occurred in southern, central, and northern China, which has repeatedly caused large-scale and long-term outages of power transmission lines in various provinces in our country, causing huge losses to the national economy and people's lives. . In order to prevent this situation from recurring, after the ice disaster in 2008, my country's electric power science and technology workers independently carried out the research and development of DC ice melting technology and devices, and suc...

AI Technical Summary

Problems solved by technology

However, due to the high resistance of the ground wire, if the ground wire is short-circuited at the end after the ground wire is fully insulated, and then the ice is melted, the required output voltage of the ice-melting device is high, so the insulation level of the ground wire has to be improved , and the improvement of the insulation level of the ground wire means a significant decrease in the lightning protection effect of the ground wire and an increase in the transformation cost. At the same time, the increase in the output voltage of the ice melting device will also increase the cost of the ice melting device. The above The reason, ultimately, that the ground-line melting scheme cannot be realized

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