CN202548194U

CN202548194U - Device for measuring high-voltage voltage by adopting transformer bushing

Info

Publication number: CN202548194U
Application number: CN 201220202166
Authority: CN
Inventors: 刘东海; 刘洪波; 葛宝金; 杨前书
Original assignee: Shandong Power Equipment Co Ltd
Current assignee: Shandong Power Equipment Co Ltd
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-11-21
Anticipated expiration: 2022-05-08

Abstract

The utility model relates to a transformer bushing for measuring high-voltage voltage, which comprises a transformer bushing, wherein a medium type capacitor is connected in series to the tail screen end of the transformer bushing; one end of the capacitor is connected with the tail screen and is connected with the voltage measuring head end of a power analyzer; and the other end of the capacitor is grounded and is connected with the voltage measuring tail end of the power analyzer. The capacitor is arranged in series to the tail screen end of the transformer bushing for measuring the high-voltage voltage, so that the high-voltage voltage can be accurately measured, and the partial discharge amount of a mutual inductor in the process of measuring the high voltage through the mutual inductor is eliminated; and therefore, the accuracy of the partial discharge is guaranteed, the production cost is reduced, and the efficiency is improved.

Description

A kind of device of using bushing shell for transformer measurement high tension voltage

Technical field

The utility model relates to transformer and reactor manufacturing, is specifically related to a kind of device that bushing shell for transformer is measured high tension voltage of using.

Background technology

Along with the development of transformer industry towards voltage levels; Doing the reactor test of voltage levels; Need measure its voltage exactly, at present generally use mutual inductor to measure high voltage, but since the generation of mutual inductor office own high-volume; The accuracy of can not assurance office putting, and cost is high, efficient is low.

Summary of the invention

To the problems referred to above, the utility model provides a kind of device that bushing shell for transformer is measured high tension voltage of using, use it to measure high tension voltage, can address the above problem, and cost is low, efficient is high.

The utility model adopts following technical scheme: a kind of device of using bushing shell for transformer measurement high tension voltage; Comprise bushing shell for transformer; The screen end series connection one medium type capacitor at the end of bushing shell for transformer, capacitor one end is connected with the end screen and connects power analyzer voltage measurement head end simultaneously; Capacitor other end ground connection and take back power analyzer voltage measurement tail end.

End screen self capacity is C1, and the electric capacity of medium type capacitor is C2,

Uc is a power analyzer measured voltage value,

k=(C1+C2)/C1

Ux=kUc。

The beneficial effect of the utility model is: the utility model is through the screen end series capacitance measurement high tension voltage at the bushing shell for transformer end; Can measure high tension voltage exactly; Eliminated mutual inductor itself when measuring high voltage with mutual inductor innings high-volume, thereby the accuracy that assurance office puts; And reduce production costs, raise the efficiency.

Description of drawings

Fig. 1 is the electrical block diagram of the utility model.

Embodiment

As shown in the figure; When doing 400kV reactor measurement of partial discharge, apply 1.5Um/

=476.3 kV voltages.Apply voltage measurement and use 750kV transformer high-voltage sleeve pipe partition piezoelectricity to hold the composition voltage divider, the electric capacity of medium type capacitor is selected 1.3 μ f, and the electric capacity C1 of bushing shell for transformer end screen selects 640.8pf.

Select the 600v dielectric capacitor for use, according to k=(C1+C2)/C1, the pressure ratio that counts the score k=2029, proofreading and correct the back intrinsic standoff ratio is k=2039.Comparison is marked to hold and is measured, and measures consistent with the mark appearance basically.

Utilize the utility model, we have obtained our needed voltage on the one hand, and we have also measured the voltage of its generation accurately on the other hand, and itself can generation office not put.

Claims

1. use the device that bushing shell for transformer is measured high tension voltage for one kind, comprise bushing shell for transformer, it is characterized in that: the screen end series connection one medium type capacitor at the end of bushing shell for transformer, capacitor one end is connected with the end screen and connects power analyzer voltage measurement head end simultaneously; Capacitor other end ground connection and connect power analyzer voltage measurement tail end.