On-line digital measurement for the quality analysis of power systems under nonsinusoidal conditions

This paper presents a digital instrument for the power quality analysis in systems where voltage or current waveforms are nonsinusoidal, It is based o n a C40 DSP and on a special high-speed data acquisition system. The analys is is performed by a recursive algorithm which allows the mutable system pr oprieties to be tracked on-line. The paper also goes on to discuss the perf ormance of an instrument prototype, both in terms of accuracy and speed of measurement.