A high dynamic magnetooptic current transformer with advanced signal processing

Author

Mohr, Stephan ; Bosselmann, Thomas

Author_Institution

Corporate Technol., Siemens AG, Erlangen, Germany

Volume

3

Issue

1

fYear

2003

Firstpage

87

Lastpage

94

Abstract

In the power industry, current has to be measured for metering and protection purposes. Conventional sensor setups need two transformers to realize the high dynamic range. By the described mixed analog/digital signal processing algorithm, the inherent low photonic noise of the input signals was maintained up to the full sensor output. The system design is based on a rigorous investigation and optimization of the error sources in the signal processing chain. The results are proved by a demonstrator, achieving a dynamic range from 0.05 to 100 times the rated current and a ratio root mean square error of less than 0.5%.

Keywords

Faraday effect; analogue-digital conversion; circuit noise; current transformers; electric current measurement; error analysis; magneto-optical sensors; metering; power system protection; signal processing equipment; ADC; Faraday effect; analog-to-digital interface; current sensor accuracy; current transformer output signal processing; error analysis; low input signal photonic noise; magnetooptic high dynamic range current transformers; mixed analog/digital signal processing; noise analysis; power industry current measurement; power metering; power system protection; ratio root mean square errors; signal processing error source optimization; transformer rated current; Current measurement; Current transformers; Dynamic range; Magnetic sensors; Optoelectronic and photonic sensors; Power industry; Power measurement; Power system protection; Signal processing; Signal processing algorithms;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2003.810104

Filename

1194399