Two methods for improved measurements of reactive power and reactive energy insensitive to frequency variations

Author

Djokic, Branislav V. ; Bosnjakovic, Petar

Author_Institution

Nat. Mes. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada

Volume

47

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

215

Lastpage

218

Abstract

The paper describes the implementation of successive frequency-to-voltage and voltage-to-frequency conversion used to achieve a wideband frequency multiplication allowing reactive power and reactive energy measurements in the range of 40 Hz to 70 Hz of the input signal frequency. It also describes a phase shifting method which provides independence of the shifted signal of the capacitor value used in the phase shifter. This feature ensures long term stability and wide temperature operating range of the meter while retaining high accuracy

Keywords

energy measurement; frequency multipliers; phase shifters; power measurement; power meters; reactive power; voltage-frequency convertors; watthour meters; 40 to 70 Hz; capacitor value; double conversion; frequency variations; frequency-to-voltage conversion; high accuracy; improved measurement methods; long term stability; phase shifting method; reactive energy measurement; reactive energy meters; reactive power measurement; shifted signal independence; time division convertor; voltage-to-frequency conversion; watthour meter; wide temperature operating range; wideband frequency multiplication; Capacitors; Energy measurement; Frequency conversion; Phase shifters; Power measurement; Reactive power; Stability; Temperature distribution; Voltage; Wideband;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.728821

Filename

728821