Digital realization of frequency insensitive phase shifter for reactive Var-Hour meters

Author

Saranovac, Lazar V.

Author_Institution

Fac. of Electr. Eng., Belgrade, Yugoslavia

Volume

49

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

802

Lastpage

808

Abstract

The paper describes a digital realization of a circuit for an additional phase shift of π/2 between two input signals, with a constant amplification nondependent on frequency. The circuit is intended for measuring the reactive power and energy of electric networks. The solution is based on a coupled digital integrator and differentiator and the microcontroller application. The results of simulation and experiments show that the solution is applicable in standard (classes 2 and 3) and precise reactive meters (class 0.2)

Keywords

differentiating circuits; digital filters; integrating circuits; microcontrollers; phase shifters; power meters; reactive power; signal sampling; synchronisation; transfer functions; two-term control; PI regulator; additional phase shift; constant amplification; coupled digital integrator-differentiator; digital filters; digital realization; frequency insensitive phase shifter; microcontroller application; precise reactive meters; reactive Var-Hour meters; reactive energy meters; standard reactive meters; transfer functions; Circuit simulation; Coupling circuits; Electric variables measurement; Energy measurement; Frequency; Integrated circuit measurements; Microcontrollers; Phase shifters; Power measurement; Reactive power;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.863928

Filename

863928