10kv multifunctional Anti-disaster insulator and preparation method therefor

Abstract

The invention provides a 10kV multifunctional anti-disaster insulator and a preparation method therefor. The insulator comprises an arc-shaped wire duct fitting, an upwards bent rod-shaped discharge electrode, a composite insulator assembly, an insulating umbrella sleeve, a core rod and a steel leg fitting. The composite insulator assembly comprises a lower conductive cushion block, a metallic oxide resistor piece group, a central conductive cushion block, an insulating cushion block and an upper conductive cushion block, wherein the lower conductive cushion block, the metallic oxide resistor piece group, the central conductive cushion block, the insulating cushion block and the upper conductive cushion block are sequentially disposed on the core rod in a sleeving manner and are attached to each other. The arc-shaped wire duct fitting passes through the insulating umbrella sleeve to be connected with the upper conductive cushion block. The central conductive cushion block is connected with the upwards bent rod-shaped discharge electrode which passes through the insulating umbrella sleeve to extend outside the insulating umbrella sleeve. There is an air gap between the upwards bent rod-shaped discharge electrode and the arc-shaped wire duct fitting. The insulator can achieve the anti-thunder and anti-icing-flashover functions of a 10kV line at the same time, gives the consideration to the functions of resisting to rainstorm, birds droppings, dirt and falling branches and leaves, does not need to change a pole tower structure, facilitates the reconstruction of a conventional power transmission line, and can greatly saves the construction investment of a power distribution network.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a 10kV multifunctional disaster-proof insulator and a preparation method thereof. Background technique [0002] The distribution network line is an important part of the system in the five subsystems of power system generation, transmission, transformation, distribution, and use. It undertakes the important task of distributing electric energy to the load. The low insulation level and the simple grid structure make it unable to protect against direct lightning strikes. In addition, the induced lightning voltage generated by lightning on the wire also greatly exceeds the insulation level of the distribution line. According to statistics, in the power grid with a voltage level of 6-35kV, the lightning trip rate remains high, and there are often pole-mounted switches, knife switches, lightning arresters, transformers, bushings and other equipment damaged ...

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Problems solved by technology

[0005] 1) The insulator’s functions of preventing bird damage, falling branches, and heavy rain are not considered. Under such disasters, the overall insulation performance of the insulator decreases, and the stability of power supply is difficult to guarantee;

[0006] 2) The size of the umbrella group and the discharge electrode is not optimally designed, and the structural design of the discharge electrode is defective. During the ice-covered period, there will be bridging between the discharge electrodes, the insulation section will fail, the aging of the arrester valve will increase, and the lightning protection and anti-ice flash effect will decline.

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