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Indexed by:期刊论文

Date of Publication:2002-01-01

Journal:Journal of Shanghai University

Included Journals:Scopus、ISTIC

Volume:6

Issue:1

Page Number:79-84

ISSN No.:10076417

Abstract:A high-performance current and voltage measurement system has been developed in power system. The system is composed of two parts: one current measurement element and one voltage measurement element. A Rogowski coil and a capacitive voltage divider are used respectively for the line current and voltage measurements. Active electronic components are used to modulate signal, and power supply for these components is drawn from power line via an auxiliary current transformer. Measurement signal is transmitted by optical fibers, which is resistant to electromagnetic induction and noise. With careful design and the use of digital signal processing technology, the whole system can meet 0.5% accuracy for metering and provides large dynamic range coupled with good accuracy for protective relaying use. ? 2002 Shanghai University.