Three phase mutual inductor check meter

A calibrator and processor technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of inability to measure three-phase errors at the same time, repeated wiring, low efficiency, etc., to achieve easy inspection, save manpower and material resources, Ensure fair and equitable results

Inactive Publication Date: 2015-09-09
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing three-phase calibrator that can only perform error calibration on a single phase, such as repeated wiring, low efficiency, and inability to measure three-phase errors at the same time, the invention discloses a three-phase sensor calibrator

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  • Three phase mutual inductor check meter

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Embodiment Construction

[0019] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] The three-phase sensor calibrator of the present invention includes a display, and also includes a digital signal processor and three single-phase operation processing units, and the single-phase operation processing unit includes a current detection branch, a voltage detection branch and Error detection branch;

[0021] The current detection branch is composed of a current sampling input terminal, a current transformer, a signal amplifier and an AD converter connected in sequence; the voltage detection branch is composed of a voltage sampling input terminal, a voltage transformer, a signal amplifier and an AD converter connected in sequence Composition; the error detection branch is composed of an error input terminal, a signal amplifier and an AD converter connected in sequence;

[0022] The AD converter output terminals o...

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Abstract

The invention discloses a three phase mutual inductor check meter, comprising a display, a digital signal processor and three single phase operation processing units, wherein each single phase operation processing unit comprises a current detection branch, a voltage detection branch and an error detection branch; the current detection branch is composed of a current sampling input terminal, a current transformer, a signal amplifier and an ADC which are successively in connection; the voltage detection branch is composed of a voltage sampling input terminal, a voltage transformer, a signal amplifier and an ADC which are successively in connection; the error detection branch is composed of an error input terminal, a signal amplifier and an ADC which are successively in connection. The ADC output terminal of each detection branch of each single phase operation processing unit is in connection with the digital signal processor which is in signal connection with the display. The three phase mutual inductor check meter changes a current traditional single phase examination method, and accurately reflects characteristics of a three phase mutual inductor in a work state.

Description

technical field [0001] The invention belongs to the field of power electronics, and relates to a detection device for power grid equipment, which is mainly used for error testing of high-voltage three-phase combined transformers in distribution networks and electromagnetic field interference effects tests between phases of three-phase combined transformers, specifically a three-phase combined transformer. calibrator. Background technique [0002] On-site three-phase combined transformers and three-phase voltage transformers are widely used in 35kV and below voltage systems, such as the three-phase combined transformers (metering boxes) currently installed on the distribution network in China, and there are millions Sets. At present, the verification of the three mutual inductors is carried out using the single-phase method. The state of the transformer during the single-phase method is inconsistent with its actual operating state (the three-phase transformer is under high v...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
Inventor 刘刚刘鹍何培东江波何娜
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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