High-power low-harmonic direct-current deicing device

A DC ice-melting, low-harmonic technology, applied in overhead installation, cable installation, electrical components, etc., can solve the problems of large area, large rectifier harmonics, large volume, etc. Cost, simplified structure, and the effect of eliminating filter devices

Pending Publication Date: 2021-06-11
湖南防灾科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Controlled rectification is usually a thyristor rectification, and the output voltage is continuously adjustable, but the rectification harmonics are large, and a special filter needs to be configured, which is bulky, occupies a large area, and is expensive

Method used

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  • High-power low-harmonic direct-current deicing device

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Embodiment Construction

[0031] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

[0033] figure 1 A structural block diagram of a high-power low-harmonic DC deicing device provided by an embodiment of the present disclosure. see figure 1 , the high-power low-harmonic DC deicing device includes an input circuit breaker 1 , a rectification system 2 and an output circuit break...

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Abstract

The invention relates to a high-power low-harmonic direct-current deicing device, which comprises an input circuit breaker, a rectification system and an output circuit breaker, wherein the rectification system comprises a resonance elimination component and at least two uncontrolled rectification components, the input end of the input circuit breaker is used for accessing alternating current, the input end of the resonance elimination component is electrically connected with the output end of the input circuit breaker, the output end of the resonance elimination component is electrically connected with the input ends of the uncontrolled rectification components, the output ends of the uncontrolled rectification components are electrically connected with the input end of the output circuit breaker, and the output end of the output circuit breaker is electrically connected with a power transmission line to be de-iced. According to the invention, the high-power low-harmonic direct-current deicing device can meet the requirements of harmonic wave, protection and current sharing during line ice-melting high-voltage large-current operation, does not need to be provided with a special filtering device and a special protection device, and can realize current-sharing operation between parallel rectifier bridges.

Description

technical field [0001] The present disclosure relates to the technical field of electrical engineering, in particular to a high-power low-harmonic DC ice-melting device. Background technique [0002] Ice and snow disasters occur frequently in southern regions such as Guizhou, Hunan, and Hubei in China. Due to abnormal climate changes in recent years and even northern regions such as Beijing and Liaoning, ice and snow disasters also occur from time to time. After the transmission line is covered with ice, it is easy to cause tower collapse and disconnection, which seriously threatens the power grid. Safe and stable operation and power supply reliability. [0003] DC ice melting is a technology that converts AC power into DC power through a power electronic rectifier, and uses DC power to heat a certain length of ice-covered lines to achieve the purpose of melting ice. Etc. At present, the ice-melting rectifier mainly adopts controllable rectification. The controllable rect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/16
CPCH02G7/16
Inventor 陆佳政朱思国熊蔚立李波谭艳军周秀冬黄清军朱远毛新果
Owner 湖南防灾科技有限公司
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