Title :
A nonlinear adaptive filter for online signal analysis in power systems: applications
Author :
Karimi-Ghartemani, Masoud ; Iravani, M. Reza
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
4/1/2002 12:00:00 AM
Abstract :
This paper presents various applications of a nonlinear adaptive notch filter which operates based on the concept of an enhanced phase-locked loop (PLL). Applications of the filter for online signal analysis for power systems protection, control and power quality enhancement are presented. The proposed scheme can be applied for signal analysis both under stationary and nonstationary conditions. Based on digital time-domain simulations, applications of the filter for (a) sinusoidal waveform peak detection, (b) harmonic identification/detection, (c) detection/extraction of individual components of a signal, (d) instantaneous reactive current extraction, (e) disturbance detection, (f) noise reduction in zero-crossings detection, and (g) amplitude (phase) demodulation for flicker estimation, are presented
Keywords :
adaptive filters; nonlinear filters; notch filters; phase locked loops; power supply quality; power system control; power system protection; signal processing; time-domain analysis; PLL; amplitude demodulation; digital time-domain simulations; disturbance detection; enhanced phase-locked loop; flicker; harmonic identification/detection; instantaneous reactive current extraction; noise reduction; nonlinear adaptive filter; nonlinear adaptive notch filter; nonstationary conditions; online signal analysis; phase demodulation; power quality enhancement; power systems; power systems control; power systems protection; signal components detection/extraction; sinusoidal waveform peak detection; stationary conditions; zero-crossings detection; Adaptive filters; Control systems; Phase detection; Phase locked loops; Power harmonic filters; Power quality; Power system control; Power system protection; Signal analysis; Time domain analysis;
Journal_Title :
Power Delivery, IEEE Transactions on
