Title :
The real time measuring of harmonic for three phase network
Author_Institution :
Beijing Electr. Power Sci. Res. Inst., China
Abstract :
An instrument for real-time measurement of harmonic and negative-sequence components for three-phase networks is presented. The instrument has six separate analog measuring channels and microtransformers with electronic compensators and the signal prehandling circuits are used to minimize aliasing effects. The instrument uses a prestraightening sync-sample technique for leakage reduction and uses two monolithic microcomputers, as well as an arithmetic processor to enhance its analysis speed. It measures the magnitude and the phase of all harmonics up to the 60th as well as negative components of the fundamental voltage and current.<>
Keywords :
computerised instrumentation; electric current measurement; electric distortion measurement; harmonic analysis; microcomputer applications; power system measurement; voltage measurement; aliasing effects; analogue measuring channels; electric distortion; electronic compensators; harmonics measurement; leakage reduction; microtransformers; monolithic microcomputers; negative-sequence components; phase; real-time measurement; signal prehandling circuits; sync-sample technique; three phase network; Circuits; Clocks; Current measurement; Harmonic analysis; Instruments; Phase measurement; Pollution measurement; Power measurement; Power system harmonics; Velocity measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109930
