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Second order filter mechanism of rural power grid de-icing device

A second-order filtering and ice-melting technology, which is applied to the output power conversion device, overhead installation, cable installation, etc., can solve the problems of harmonic pollution of the power grid, harmonic distortion at the input side of the ice-melting device, etc., and achieve the suppression of current harmonics. Wave distortion, improve the effect of adjusting the width

Inactive Publication Date: 2013-09-11
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

However, the device utilizes the high-frequency on and off of the IGBT to realize continuous output of DC voltage, which may easily cause large current harmonic distortion on the input side of the ice melting device, causing serious harmonic pollution to the power grid.

Method used

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  • Second order filter mechanism of rural power grid de-icing device

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Embodiment Construction

[0017] see figure 1 Shown is a specific embodiment of the second-order filter mechanism of the rural network ice-melting device of the present invention, the second-order inductance filter 1 of this embodiment adopts the LSL-600mh type adjustable inductor produced by Lushan Electronics Co., Ltd., Changsha City, Hunan Province, China; The second-order capacitor filter 2 adopts the HCC-600mf adjustable capacitor produced by Xi'an Huachao Capacitor Co., Ltd. in Shaanxi Province, China; the harmonic measuring instrument 3 adopts the HCKJ-XB1 harmonic developed by Hunan Huicui Power Technology Co., Ltd. Wave measuring instrument; the inductance regulator 4 adopts the HCDG-TJ1 inductance regulator developed by China Hunan Huicui Power Technology Co., Ltd.; the capacitance regulator 5 adopts the HCDR-TJ1 developed by China Hunan Huicui Power Technology Co., Ltd. capacitor regulator. Described second-order inductance filter 1, second-order capacitor filter 2, harmonic measuring instr...

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Abstract

The invention discloses a second order filter mechanism of a rural power grid de-icing device. The second order filter mechanism consists of a second order inductance filter (1), a second order capacitive filter (2), a harmonic measurement instrument (3), an inductance adjuster (4) and a capacitance adjuster (5), wherein the output end of the second order inductance filter (1) is connected with the input end of the second order capacitive filter (2). The output end of the second order capacitive filter (2) is connected with the input end of the harmonic measurement instrument (3). The output end of the harmonic measurement instrument (3) is connected with the inductance adjuster (4) and the input end of the capacitance adjuster (5) in parallel. The current harmonic distortion on the input side of the rural power grid de-icing device can be effectively suppressed, adjustment of an inductance value and a capacitance value can be automatically implemented, the good smoothing effect is played on current fluctuation on the output side, and adjustment amplitude of the chopped wave frequency of an insulated gate bipolar transistor (IGBT) can be effectively improved in a harmonic permissible range.

Description

technical field [0001] The patent of the invention belongs to the technical field of electrical engineering, and relates to a second-order filter mechanism of a DC ice-melting device for rural power grids based on the chopping principle of IGBT (English full name is the abbreviation of Insulated Gate Bipolar Transistor, and the Chinese translation is Insulated Gate Bipolar Transistor). . Background technique [0002] Ice and snow disasters occur frequently in southern my country, which can easily cause serious damage to the transmission lines of the power grid. However, the transmission lines of the rural power grid are widely distributed and large in number, which is more likely to cause ice damage. If direct current is used to melt ice, the reactance component on the transmission line will not work, and with the same size of ice melting current, the voltage applied by direct current ice melting is much smaller than that of alternating current ice melting, which greatly imp...

Claims

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Application Information

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IPC IPC(8): H02G7/16H02M1/14
Inventor 陆佳政朱思国李波方针张红先赵纯
Owner STATE GRID CORP OF CHINA
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