Power grid layout structure and system based on ice-melting function

Abstract

The invention provides a power grid layout structure and system based on an ice-melting function. The power grid layout structure and system comprises a transformer non-melting side three-phase line providing an ice melting power source and a transformer melting side three-phase line; and two phase lines of the transformer melting side three-phase line are connected in parallel by a rotation conversion mode, and the two phases in parallel and the non-parallel phase form an operating loop, thereby reducing the impedance of the loop, and achieving the effects of extending the melting distance and increasing the melting speed. The power grid layout structure and system effectively solve the problem of ice melting in extreme weather such as ice disaster by means of parallel operation and phaseloss operation; compared with three-phase direct short-circuit ice melting, the power grid layout structure and system not only significantly prolong the melting distance, but also increases the three-phase ice melting speed more efficiently; and the power grid layout structure and system guarantee the ice melting effect of transmission and distribution lines of different voltage levels, are simple and easy in operation, low in safety risk and wide in the scope of application, greatly save the asset investment of power grid enterprises, and have high practicability.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a power grid layout structure and system based on the ice-melting function. Background technique [0002] The impact of extreme weather such as rain, snow, and freezing on the power industry cannot be underestimated. If the icing problem of the line cannot be dealt with in time after the snow, it will have a huge impact on the operation of the power grid and the reliability of power supply for users. [0003] In recent years, there have been several demonstrations of step-down and short-circuit AC ice melting of power grid transformers and AC ice melting of generators. Although it is theoretically feasible to use this method for ice melting, the existing technology of distribution transformer step-down The short-circuit AC ice melting method still has the following disadvantages: [0004] (1) The ice-melting voltage is only 400V. According to the calculation of LG...

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Problems solved by technology

[0004] (1) The ice-melting voltage is only 400V. According to the calculation of LGJ70--95 wire in the common ice-walking area, it can only melt ice for about 1.3 kilometers, but the most common ice-walking area is about 2-5 kilometers, and the ice-melting distance is too large. Short, to be carried out step by step, time-consuming and slow;

[0005] (2) The labor intensity of the workers is high, the work efficiency is low, and there is ice on the site, the working environment is poor, and the risk of working safety is great

[0006] To sum up, the existing technology lacks an efficient means of melting ice to meet the emergency demand for power supply in extreme weather such as ice disasters

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