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

Abstract

The invention discloses a periodic non-sinusoidal wave reference of an electronic voltage transformer with a voltage booster, comprising an iron core for the fundamental wave, an iron core for the harmonic wave, a fundamental wave power supplying coil, a harmonic wave power supplying coil, a primary coil, a secondary coil, a short-circuit current-limiting resistor and an error compensation circuit. By adopting the invention, the primary test voltage of the periodic non-sinusoidal wave for verifying the accuracy of the electronic current transformer can be generated, and the secondary reference voltage in linear proportional relation with the primary test voltage of the periodic non-sinusoidal wave can be output, thereby the invention overcomes the limitations of the accuracy error verification for the fundamental wave and the harmonic wave of the traditional electronic voltage transformer under the condition of the single frequency; when the accuracies of the fundamental wave and the harmonic wave of the electronic type voltage transformer are verified at the same time under the condition of the periodic non-sinusoidal wave, the requirements of the primary test voltage and the reference are satisfied, so that the non-linear phenomenon of the electronic voltage 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 voltage transformer with a booster. Background technique [0002] Electronic voltage transformer is a kind of voltage sensor, which is an updated product of traditional electromagnetic voltage transformer. It is mainly used for electric energy measurement and safety protection of power grid. The traditional electromagnetic voltage transformer has a narrow measurement frequency band. It uses an iron core coil to sense the primary voltage, and its secondary terminal rated output is 100V or standard voltage value. The electronic voltage transformer has the characteristics of measuring frequency bandwidth and low power consumption. It mainly uses optical devices, resistor dividers and capacitive dividers to sense the primary voltage, and is equipp...

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Problems solved by technology

Since the output terminal of the distorted wave booster is directly connected to the primary end of the reference, that is, the output voltage of the booster is the same as the primary test voltage of the reference, it can be considered to combine the distorted wave booster and the reference into one, but the current There are no patents or literature reports for the equipment

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