Standard verification apparatus of high-voltage three-phase combined transformer

A technology of combining transformers and standard devices, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, can solve problems that affect the fairness and justice of electric energy trade settlement, do not meet product use conditions, and detect errors, so as to improve test stability. and precision, solve the unbalance, and ensure the effect of accuracy
CN101403789AActive Publication Date: 2009-04-08STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
Publication Date
2009-04-08

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Abstract

The invention relates to a standard calibrating device of a high-voltage three-phase combined mutual inductor, which belongs to an electronic calibrating device used for the electric energy measurement and the current measurement. The electronic calibrating device comprises a single chip, an A / D converter, a front end circuit and a 380v three-phase power supply; three current risers and the three-phase power supply adopt the star connection and are connected with a compensation winding Ns of a compensation adjusting coil in parallel, a secondary winding of the compensation adjusting coil is connected with a primary winding of a standard current mutual inductor; three voltage risers and the three-phase power supply adopt the delta connection and are connected with a compensation winding Y of the compensation adjusting coil in parallel, the secondary winding of the compensation adjusting coil is connected with a primary winding of a standard voltage mutual inductor, and the secondary windings of the standard circuit mutual inductor and the standard voltage mutual inductor are all used for connecting the tested three-phase combined mutual inductor. The invention can simulate the actual operation status of the mutual inductor, carry out the calibration test under the actual operation status and correctly reflect the actual error and the relevant performance of the three-phase mutual inductor.
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Description

technical field

[0001] The invention relates to a standard device for measuring and verifying electric energy, in particular to the measuring and verifying device for electric energy measuring and verifying the measurement error performance and temperature rise performance of a high-voltage three-phase combined transformer in simulating its actual operation state. Background technique

[0002] At present, three-phase combined transformers (metering boxes) with a voltage level of 35kV and below have been widely used, and most of this type of equipment is installed in large users and special stations for gateway metering, and its quality and performance are directly related to electric energy. The accuracy of measurement also affects the safe operation and production of the power sector, so it must be verified and tested to ensure its quality and measurement accuracy. The JB / T10432-2004 "Three-phase combined transformer" standard implemented by the relevant state departments o...

Claims

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