Online Wavelet Transform-Based Control Strategy for UPQC Control System
- 26 December 2006
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 22 (1), 481-491
- https://doi.org/10.1109/tpwrd.2006.883026
Abstract
In this paper, a new algorithm is proposed to estimate amplitude and phase angle (and frequency) of load currents and source voltages in the presence of harmonics and frequency oscillation. Moreover, a comprehensive control strategy is introduced to extract the compensating signals for the control of series and shunt converters of the unified power-quality conditioner (UPQC). The basic approach used in this algorithm is to extract the fundamental component of load current and source voltage by using wavelet-transform decomposition. Then, the amplitude, phase angle, and frequency of fundamental component are calculated using the well-known LS algorithm, which is relatively simple and fast. The voltage and current references of UPQC active power filters are obtained using the positive sequence of three-phase system voltages and load currents. The proposed control strategy can extract the reference currents and voltages of UPQC fast and accurately in the presence of harmonics and/or frequency oscillation. Simulation results have been presented to show improvement of the UPQC performance in the presence of frequency and amplitude variation condition and various forms of current and voltage distortionKeywords
This publication has 21 references indexed in Scilit:
- A novel control strategy for unified power quality conditioner (UPQC)Published by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Online control of current-source-type active rectifier using transfer function approachIEEE Transactions on Industrial Electronics, 2001
- A multilevel converter-based universal power conditionerIEEE Transactions on Industry Applications, 2000
- Power measurement using the wavelet transformIEEE Transactions on Instrumentation and Measurement, 1998
- An universal active power line conditionerIEEE Transactions on Power Delivery, 1998
- Fast adaptive schemes for tracking voltage phasor and local frequency in power transmission and distribution systemsIEEE Transactions on Power Delivery, 1992
- A theory for multiresolution signal decomposition: the wavelet representationIeee Transactions On Pattern Analysis and Machine Intelligence, 1989
- Dead Beat Microprocessor Control of PWM Inverter for Sinusoidal Output Waveform SynthesisIEEE Transactions on Industry Applications, 1987
- A Least Error Squares Technique For Determining Power System FrequencyIEEE Transactions on Power Apparatus and Systems, 1985
- A Quantitative Study of Pitfalls in the FFTIEEE Transactions on Aerospace and Electronic Systems, 1980