Pillar type capacitor voltage transformer

Abstract

The invention discloses a pillar type capacitor voltage transformer, comprising a capacitive voltage divider and an electromagnetic unit. The pillar type capacitor voltage transformer is characterized in that the upper part of the capacitive voltage divider is connected with a grading ring through a line terminal, the bottom of the capacitive voltage divider is fixedly connected with a support base which is connected with the electromagnetic unit, the capacitive voltage divider is formed by capacitor units with a tower structure, the capacitor units are connected with one another in series and overlapped, and a porcelain sleeve with a tower structure is arranged outside the capacitor units and shares one shell with a support pillar. The pillar type capacitor voltage transformer has the advantages of high mechanical strength (namely high bending resistance), earthquake resistance, small floor area, low cost and convenience in installation and wiring.

Description

technical field [0001] The invention relates to a capacitive voltage transformer, in particular to a pillar type capacitive voltage transformer. Background technique [0002] Conventional 1000kV voltage-level capacitive voltage transformers are used for metering and measurement in 1000kV UHV power systems. [0003] The 1000kV voltage level capacitive voltage transformer (hereinafter referred to as the transformer) is connected to the system through a metal tube busbar (abbreviated as the tube busbar) or a split wire; due to the high voltage level, factors such as reducing line loss, noise and preventing corona are considered , tube female or split wires are generally very thick, so the weight is also very heavy. [0004] Since the conventional 1000kV voltage level capacitive voltage transformer cannot be used as a pillar, in order to avoid the excessive force of the tube mother on the transformer and damage the transformer, it is usually supported by another column or two p...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the combined use of this kind of transformer and post insulator are: 1. It occupies a large area

2. Higher cost

After the post insulator is added, the installation base and wiring fittings need to be increased accordingly, so the cost is higher

3. Poor earthquake resistance and wind resistance

The post insulator and the transformer are not a whole, but they are connected by pipe mother. When the wind or earthquake acts, the post insulator and the transformer will be damaged due to mutual pulling

4. Inconvenient installation and wiring

There are many parts in the transformer, and there are many parts in the post insulator. In addition, the distance between the two is relatively short, so it is not convenient to hoist and install. In addition, the height of the post insulator must be adjusted on site according to the height of the transformer. Increased difficulty of installation

The high-voltage terminal wiring is a high-altitude operation. One is to ensure personal safety, and the other is to pay attention to the direction and angle when wiring, so it is difficult

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