Ice melting method for agricultural distribution network

Abstract

The invention discloses a novel ice-melting method for an agricultural distribution network. The method comprises the following steps: executing the ice-melting modification to the current agricultural distribution network; determining the section to be ice-melted; stopping the power supply of a distribution circuit and breaking an isolation breaker; selecting a distribution transformer, wherein the output end thereof is parallelly connected to a route of an ice-melting circuit until the head end of the section to be ice-melted, and the tail end of the section to be ice-melted is directly short-connected; closing a line-breaker and executing the ice-melting to the section to be ice-melted; after the ice-melting, breaking the line-breaker, detaching the ice-melting circuit and the short circuit, and closing the isolation breaker; repeatedly executing the above-mentioned steps, until the ice-melting work of all sections is completed; and closing the line-breaker, and recovering the power supply of the distribution circuit. The method is simple and convenient, the ice-melting range is wide, the modification is convenient, the investment is small, the ice-melting work can be executed in sections, the ice-melting power is saved, and the ice-melting process is flexible and convenient. The alternating voltage is used in the ice-melting process, so partial distribution transformers along the circuit cannot be broken, the workload is small, the ice-melting operation time is greatly shortened, the ice-melting wiring is convenient, and the ice-melting efficiency is high.

Description

technical field [0001] The invention specifically relates to an ice-melting method for an agricultural distribution network. Background technique [0002] With the development of national economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. [0003] However, the transmission lines of the power system are often arranged outdoors and are subjected to the influence of severe weather. In recent years, rain, snow and freezing disasters have occurred frequently in the southern region, which has seriously affected the operation of the power grid. Since the lines of the agricultural distribution network have many points and a wide area, and are mostly distributed in mountainous areas with obvious micro-topography and micro-climate, the icing situation is particularly serious in winter, which poses a se...

AI Technical Summary

Problems solved by technology

The existing agricultural distribution network lines, due to the many branches of the line, and the ice-covered areas are mostly mountainous areas with inconvenient transportation, the existing ice melting methods cannot be directly used to melt ice on the agricultural distribution network lines

Some scientific research institutes have developed ice-melting methods such as using vehicle-mounted power supply for mobile DC ice-melting, and using in-station AC power supply for step-down ice-melting ice. Power grid transformers have a lot of preparation work in the early stage of ice melting, and the efficiency of ice melting is low, and the ice melting distance is limited by the capacity of the vehicle power supply when melting ice; Ice-dedicated transformers can generally only melt ice for the main line, and the investment cost is relatively high, so there is not much promotion at present

In the current situation where the main network is strong and the distribution network is weak, the agricultural distribution network system still lacks economical and effective means of melting ice

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