Periodic non-sinusoidal wave reference of electronic current transformer with current booster

Abstract

The invention discloses a periodic non-sinusoidal wave reference of an electronic current transformer with a current booster, comprising a main iron core of the current booster, an auxiliary iron core of the current booster, a reference main iron core, a reference auxiliary iron core, a fundamental wave power supply supplying coil, a harmonic wave power supplying coil, a primary coil, a secondary coil, a detection coil of the current booster, a compensation coil of the current booster, a reference detection coil, a reference compensation coil, a compensation mechanism, a pure resistive built-in precise resistor, an operational amplifier and a secondary coil shielding layer. By adopting the invention, the primary test current of the periodic non-sinusoidal wave for verifying the accuracy of the electronic current transformer can be generated, and the secondary standard reference voltage in linear proportional relation with the primary test current of the periodic non-sinusoidal wave can be output, the limitations of verification accuracy for the fundamental wave and the harmonic wave of the traditional electronic current transformer under the condition of the single frequency is overcome, and the non-linear phenomenon of the electronic current transformer is verified.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic measurement, in particular to a benchmark for transformer calibration, in particular to a periodic non-sinusoidal wave benchmark for an electronic current transformer with a current booster. Background technique [0002] Electronic current transformer is a kind of current sensor, which is an updated product of traditional electromagnetic current transformer. It is mainly used for power grid power metering, power quality analysis and safety protection. The traditional electromagnetic current transformer has a narrow measurement frequency band. It uses an iron core coil to sense the primary current, and its secondary terminal rated output is a current standard value of 5A or 1A. The electronic current transformer has the characteristics of wide frequency measurement and low power consumption. It mainly uses optical devices with electronic devices, air-core coils with or without built-in inte...

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Problems solved by technology

Since the output current of the distorted wave current booster is the same as the primary test current of the reference, it can be considered to combine the distorted wave current booster and the reference into one, but there is no patent or literature report for such a device at present

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