Combined high-tension current potential transformer

Abstract

The invention discloses a combination type high voltage current voltage transformer, comprising a current main body and a voltage main body as an integer, wherein the current main body is the current transformer provided with a primary current input end and a primary current output end. The main insulation of the current transformer is the capacitance type structure. The voltage main body includes a middle transformer, the primary voltage of which is educed from the middle capacitance tap of the current transformer to make the voltage main body constitute the capacitance type voltage transformer. The secondary current of the current transformer and the secondary voltage of the voltage transformer are respectively educed. The invention realizes that one device completes the two functions of the current transformer and the voltage transformer, meanwhile saves the capacitance voltage divider and the couple capacitor of the capacitance type voltage transformer, which reduces the manufacture cost. The invention has small occupation area, convenient installation and use, low cost, which is used in the high voltage system with marked advantage and the cost is reduced to 50%.

Description

technical field [0001] The invention relates to a transformer used in a power system, in particular to a combined high voltage current voltage transformer. Background technique [0002] The high-voltage transformers used on the power grid, especially the transformers of 110KV and higher voltage levels, are all independent structures, that is, the current transformers and voltage transformers are independent individuals, and sufficient installation is required between each transformer on the power station. The insulation space and distance increase the area occupied by the power station many times. At the same time, independent current transformers and voltage transformers also greatly waste manufacturing materials, resulting in increased manufacturing costs, thereby increasing use and maintenance costs. In the prior art, some combined current and voltage transformers are disclosed on the market and in patent documents, but they are all used when the system voltage is not ve...

AI Technical Summary

Problems solved by technology

[0002] The high-voltage transformers used on the power grid, especially the transformers with 110KV and higher voltage levels, are all independent structures, that is, the current transformers and voltage transformers are independent individuals, and sufficient installation is required between each transformer on the power station. The insulation space and distance increase the area of ​​the power station many times

At the same time, independent current transformers and voltage transformers also greatly waste manufacturing materials, resulting in increased manufacturing costs, thereby increasing use and maintenance costs

In the prior art, some combined current and voltage transformers are disclosed on the market and in patent documents, but they are all used when the system voltage is not very high, and all are independent current transformers and independent voltage transformers Simple combination and patchwork, not suitable for high pressure and ultra high pressure occasions

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