A method for melting ice of distribution lines in non-power-off mode

Abstract

The invention discloses a method for melting ice of a power distribution line in a non-power-off mode. The method includes the following steps: first, start the feeder line ice melting terminal to monitor the environmental data and line icing conditions in real time, and when the icing thickness of the distribution network line reaches the warning value, the measured meteorological data and icing thickness data will be measured through the distribution network wireless communication network Then the master station calculates the ice-melting current-time relationship curve according to the ice-melting thickness and meteorological data, sends the curve to the feeder ice-melting terminal through the distribution network communication network, and switches the feeder ice-melting terminal from the reactive power optimization mode Switch to the ice-melting mode; finally, when the ice-melting curve feedback response time of the master station exceeds the allowable value, the feeder ice-melting terminal will perform ice-melting treatment by itself according to the experience curve issued in advance by the master station. The present invention can realize the pre-melting of ice on the distribution line under the condition of continuous power supply of the load, avoid the risk of icing, and can still ensure the safe and reliable operation of the system under the condition of communication interruption.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method for melting power distribution lines in a non-power-off mode. Background technique [0002] Lishui City is located in a mountainous area and was severely damaged during the ice disaster in 2008. From January 13, 2008, a rare ice disaster raided southern China. According to statistics, the ice disaster caused a 35kV power substation in Liandu District, Lishui City to completely lose power, 17 bases of 35 kV line towers (broken), 283 bases of 10 kV line towers (broken), Low-voltage line poles (broken) fell 256 bases, and power supply lines were broken for a total of more than 200 kilometers. For a time, more than 78,000 people in 205 natural villages, 23,027 households, and 23,027 households in Liandu District suffered from power outages. Some distribution network lines in Jinyun County, Lishui City are located in mountainous areas with higher altitudes...

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Problems solved by technology

It requires personnel to drive directly in and close it, which is not feasible in itself

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