Direct current deicing device for 10KV rural power grid distribution line

A DC ice melting and distribution line technology, applied in cable installation, electrical components, overhead installation, etc., can solve problems such as backward deicing technology, achieve high ice melting efficiency, high system reliability, and short ice melting time Effect

Active Publication Date: 2014-11-12
CHENZHOU DONGTANG ELECTRIC EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the backwardness of the existing deicing technology and design and manufacture a DC deicing device for 10KV rural power distribution lines

Method used

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  • Direct current deicing device for 10KV rural power grid distribution line

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Embodiment Construction

[0024] In order to describe the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings.

[0025]A 10KV rural power distribution line DC ice-melting device, which is composed of multiple mobile 380V AC power supplies and DC constant-current heating power supplies; the DC output end of the DC constant-current heating power supply is connected to the transmission line to be ice-melted On the two phase line endpoints; the DC constant current heating power supply includes multiple identical AC rectification units 1, filter units 2, field effect tube high-frequency inverter units 3, high-frequency transformer step-down units 4, Xiao The main loop and a control unit formed by the sequential connection of the tertiary diode rectification and filtering unit 5 and the DC output unit 6; the control unit is controlled by the PWM control circuit PWM of the computer management system PC, the detection and protection...

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Abstract

The invention discloses a direct current deicing device for a 10KV rural power grid distribution line. The direct current deicing device consists of two parts, namely a plurality of movable 380V alternating current power supplies and a direct current constant current heating power supply. The direct current output end of the direct current constant current heating power supply is connected to endpoints of two phase lines of a transmission line to be deiced through a cable. 380V alternating current power is rectified and filtered to obtain high-voltage direct current, the high-voltage direct current is transmitted to inverter circuits consisting of field effect transistors after being rectified and filtered, and is converted into high-frequency alternating current with an adjustable pulse width through main circuit units, and the high-frequency alternating current is stepped down through high-frequency transformers taking amorphous soft magnetic materials as cores, and then is rectified and converted into direct current heating power required by deicing in Schottky diodes. A control signal output by a control unit can quickly respond to the output of the main circuit units, and make a quick protection response to a failure. Ice and snow on a conducting wire are thawed by utilizing heat produced by the direct current resistance of the conducting wire when heavy current flows through the conducting wire, so that the direct current deicing of an iced 10KV rural power grid distribution line is realized.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and relates to a 10KV rural power distribution line DC deicing device, which is suitable for performing DC deicing treatment on the 10KV rural power distribution line after ice coating, so as to prevent the rural power distribution line and industrial and mining Accidents such as falling towers, falling poles, broken lines, short circuits and other accidents occurred when the distribution lines for self-use of enterprises were covered with ice. Background technique [0002] The icing of transmission lines caused by low temperature, rain, snow and freezing weather is one of the serious threats faced by power systems in many countries. Severe icing will cause power grid disconnection, collapse of towers, and large-scale power outages. The 1998 North American Ice Storm severely impacted the U.S. and Canadian power grids, causing widespread power outages. In 2008, the freezing wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16
Inventor 李佐汉刘运平谭珍忠戴艳平黄万益吴灵丽
Owner CHENZHOU DONGTANG ELECTRIC EQUIP
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