Direct current thawing apparatus with special rectiformer and protection method thereof

A rectifier transformer, DC ice melting technology, applied in the direction of automatic disconnection emergency protection device, circuit device, cable installation, etc., can solve the problems of less than 5% annual utilization rate, less time, complicated equipment and wiring, etc. Achieve the effect of low cost, excellent performance and clever design

Active Publication Date: 2010-11-03
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 so

Method used

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  • Direct current thawing apparatus with special rectiformer and protection method thereof
  • Direct current thawing apparatus with special rectiformer and protection method thereof
  • Direct current thawing apparatus with special rectiformer and protection method thereof

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Embodiment Construction

[0028] The present invention proposes the arrangement of measurement points of the DC deicing device with a special rectifier transformer as follows: figure 1 As shown, it includes AC side power supply circuit breaker QF, isolating knife switch K, rectifier transformer, valve side current transformer Ivya, Ivyb, Ivyc, Ivda, Ivdb and Ivdc, converter, DC side voltage transformer Udp and Udn, DC side current transformers Idp, Idn and Idgnd, DC side switches S1, S2, S3 and S4, wherein one end of the valve side current transformers Ivya, Ivyb, Ivyc, Ivda, Ivdb and Ivdc passes through the isolation switch K and the AC side The power supply circuit breaker QF is connected to the power supply, the other end of the valve side current transformers Ivya, Ivyb, Ivyc, Ivda, Ivdb and Ivdc is connected to the converter, and one side of the converter is connected to the DC side voltage transformer Udp and through the DC The side current transformer Idp is connected to one end of the DC side s...

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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...

Claims

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Application Information

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IPC IPC(8): H02G7/16H02H3/26H02H3/04
Inventor 傅闯黎小林饶宏许树楷赵杰李立浧吴怡敏
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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