High-frequency de-icing method for high-voltage transmission line

Abstract

The invention discloses a high-voltage transmission line high-frequency de-icing method; the method is characterized in that: the high-frequency de-icing method comprises the following steps: A. a high-frequency power source is arranged at one end of the transmission line to be deiced; B. series band-pass filters for eliminating the effect on an electric power system by the high-frequency power source are respectively arranged at the two ends of the high-voltage transmission line to be deiced; C. one end of the high-frequency power source is grounded and the other end thereof is connected at one end of the high-voltage transmission line to be deiced by a parallel high-pass filter, a high-voltage adjustable condenser, a breaker with a voltage retaining coil and an isolating switch, and theother end of the high-voltage transmission line to be deiced is connected with the isolating switch, the breaker with the voltage retaining coil and the high-voltage adjustable condenser in series bythe parallel high-pass filter, and then is grounded, thus forming a high-frequency de-icing current heating loop. By utilizing heat effect and skin effect of high-frequency current, the method carries out de-icing on the ice coating lines without reforming the original transmission lines; in addition, the electric power system does not need to be powered off during de-icing.

Description

High frequency deicing method for high voltage transmission line technical field The invention relates to the technical field of power system safety, in particular to a high-frequency deicing method for high-voltage transmission lines. Background technique During the Spring Festival in 2008, the ice and snow weather in southern my country caused some or all of the main power grids of Hunan, Jiangxi, Guizhou, Hubei, Guangxi, Zhejiang, Anhui and other provinces to be interrupted. The large power outage caused by the ice and snow weather has brought huge losses to the national economy. The main reason is that the main high-voltage transmission lines in various provinces and cities cannot bear the icing thickness exceeding the design standard, so that the weight of the transmission lines increases greatly, and eventually the high-voltage transmission lines are pulled down. Power transmission poles and towers cause power outages. At the same time, most of the high-voltage tran...

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Problems solved by technology

The technical problem to be solved by the present invention is how to provide a high-voltage transmission line high-frequency deicing method, which can overcome the defects of existing methods and solve the problem of uninterruptible power line deicing, so as to meet the needs of current uninterrupted power lines. There is an urgent need for deicing power transmission lines under the circumstances, and the implementation of this technology does not require any modification of the original lines

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