Pressure type current transformer

A technology for current transformers and pressure sensors, applied in the direction of inductors, voltage/current isolation, transformers, etc., can solve the problems of complex insulation structure of current transformers, difficulty in meeting development needs, flammable and explosive oil, etc., to achieve improvement The effect of measuring range, light weight and small size

Inactive Publication Date: 2011-04-13
NORTHEAST DIANLI UNIVERSITY +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, the traditional electromagnetic current transformer has exposed a series of serious shortcomings: the insulation structure of the current transformer will be very complicated, and the cost will increase sharply; due to the inherent magnetic saturation and ferromagnetic resonance of

Method used

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Embodiment Construction

[0014] The busbar 1 of the present invention passes through the shielding shell 3 and the insulating layer 4, and is locked by the fixed latch 2. The copper core 5 is connected to the DC power supply 8. There is a pressure sensor A6 on the upper side of the copper core 5, and there is pressure on the lower side of the copper core 5. The sensor B7, the pressure sensor A6 and the pressure sensor B7 are connected to the transmitter 9, and the transmitter 9 is connected to the processor 11 through the shielded signal line 10, and the processor 11 is connected to the 485 bus 12.

[0015] Process flow of the present invention is:

[0016] a. Start the system, and self-test, if the detection error is restarted; mark the detection status on each corresponding data bit. Normal detection is marked as 1 and abnormal is marked as 0. Such as 11111110, marked as one of the last detected functional components are not working properly. If there are components that do not start properly, a ...

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Abstract

The invention discloses a pressure type current transformer, and belongs to the field of power systems. The invention aims to provide the pressure type current transformer for measuring the current of a measured circuit by using the left hand rule principle, namely the stress change of an electrified lead in a magnetic field. A bus passes through a shielding shell and an insulating layer and is clamped through a fixed clamping lock, a copper core is connected with a direct-current power supply, a pressure sensor A is arranged on the upper side of the copper core, a pressure sensor B is arranged on the lower side of the copper core, the pressure sensor A and the pressure sensor B are connected with a transmitter, the transmitter is connected with a processor through a shielding signal wire, and the processor is connected with a 485 bus. Compared with the traditional electromagnetic current transformer, the pressure type current transformer has the advantages of electromagnetic interference resistance, un-saturation, large measurement range, wide frequency band, digital signal transmission, small volume, light weight and the like.

Description

technical field [0001] The invention belongs to the field of power systems. Background technique [0002] Current transformer is an important equipment for electric energy measurement and relay protection in power system. Its accuracy and reliability are closely related to the safe, reliable and economical operation of power system. However, with the development of the power industry, the capacity of the power transmission system continues to increase, and the operating voltage level is getting higher and higher. At present, the highest voltage level of my country's power grid has reached 500 kV, and the next voltage level may be 750 kV or 1000 kV. At this time, the traditional electromagnetic current transformer has exposed a series of serious shortcomings: the insulation structure of the current transformer will be very complicated, and the cost will increase sharply; due to the inherent magnetic saturation and ferromagnetic resonance of the electromagnetic induction curre...

Claims

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Application Information

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IPC IPC(8): H01F38/28H01F38/30G01R15/18G01R19/00
Inventor 党克王冬铂张卫红孟晓敏
Owner NORTHEAST DIANLI UNIVERSITY
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