Direct current thawing apparatus with special rectiformer and protection method thereof

Abstract

The invention relates to a direct current thawing apparatus with a special rectiformer and a protection method thereof. The direct current thawing apparatus with the special rectiformer comprises an alternating current side power supply circuit breaker QF, an isolating disconnect switch K, a rectiformer, valve side current transformers Ivya, Ivyb, Ivyc, Ivda, Ivdb and Ivdc, a current converter, direct current side voltage transformers Udp and Udn, direct current side current transformers Idp, Idn and Idgnd, and direct current side knife switches S1, S2, S3 and S4. The direct current thawing apparatus has the advantages of reasonable design, low investment and low cost. The protection method ensures the direct current thawing apparatus to satisfy the demand of safe and quick thawing in all circuits, and lowers the investment into the direct current thawing apparatus. The invention has the advantages of ingenious design, favorable performance, low investment, complete protection functions, convenience and high practicality.

Description

technical field [0001] The invention relates to a DC deicing device with a special rectification transformer and a protection method thereof, and belongs to the innovative technology of the DC deicing device with a special rectification transformer and a protection method thereof. Background technique [0002] The power grid is an important infrastructure and public utility that is related to national energy security and the lifeline of the national economy. It undertakes the major responsibility of providing important energy security for economic and social development and the national economy and people's livelihood, and promoting sustainable economic and social development. With the continuous improvement of the level of modernization, the whole society relies more and more on electricity, and higher requirements are placed on the quality of electricity supply. [0003] The icing of transmission lines caused by low temperature, rain, snow and freezing weather is one of th...

AI Technical Summary

Problems solved by technology

[0006] (2) The direct current ice melting device operates in the ice melting condition for very little time each year, and the annual utilization rate is less than 5%.

But so far, it has not been used to melt ice on actual lines

The AREVA company’s solution must be equipped with special sorting transformers, AC filters, smoothing reactors, DC filters and wave traps, and the equipment and wiring are complex; without this solution, the wiring is simple and has little impact on the harmonics of the system, so it does not need to be configured Advantages such as filter banks

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