Journal ArticleDOI
Stationary frame harmonic reference generation for active filter systems
TLDR
Simulation and experimental results showing the equivalency of the stationary and synchronous frame reference generation process are presented using both shift and delta-operator-based infinite-impulse response digital filters.Abstract:
Harmonic reference generators for active filter systems are commonly implemented in the synchronous reference frame, so that simple low- or high-pass filter functions can be used depending on the requirements of a particular application. High-pass filters in particular are used when the reference generator is required to produce an "everything but the fundamental" target waveform. This paper presents a stationary frame notch filter equivalent to a high-pass synchronous frame harmonic reference generator for such systems. The use of the stationary frame allows for quicker calculation of the reference generation in a discrete digital implementation, and also allows classical control techniques to be used to analyze the active filter system without requiring synchronous frame transformations of the outside system model. Both simulation (continuous and discrete) and experimental results showing the equivalency of the stationary and synchronous frame reference generation process are presented using both shift and delta-operator-based infinite-impulse response digital filters.read more
Citations
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Journal ArticleDOI
Overview of Control and Grid Synchronization for Distributed Power Generation Systems
TL;DR: An overview of the structures for the DPGS based on fuel cell, photovoltaic, and wind turbines is given and the possibility of compensation for low-order harmonics is discussed.
Journal ArticleDOI
Proportional-resonant controllers and filters for grid-connected voltage-source converters
TL;DR: The proportional-resonant (PR) controllers and filters, and their suitability for current/voltage control of grid-connected converters, are described in this article.
Journal ArticleDOI
Multiple harmonics control for three-phase grid converter systems with the use of PI-RES current controller in a rotating frame
TL;DR: In this article, a hybrid system consisting of a proportional integral (PI) controller plus a generic hth harmonic resonant controller implemented in a frame rotating at the n th harmonic frequency is discussed in detail.
Journal ArticleDOI
Detection is key - Harmonic detection methods for active power filter applications
TL;DR: In this article, a survey of the commonly used methods for harmonic detection in active power filters (APFs) is presented, and a simulation setup that decouples the harmonic detection method from the active filter model and its controllers is proposed.
Journal ArticleDOI
Shunt Active-Power-Filter Topology Based on Parallel Interleaved Inverters
TL;DR: This paper analyzes the design of the passive components and gives a practical and low-cost solution for the minimization of the circulation currents between the inverters, by using common-mode coils.
References
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Journal ArticleDOI
The unified power quality conditioner: the integration of series- and shunt-active filters
Hideaki Fujita,Hirofumi Akagi +1 more
TL;DR: In this paper, a unified power quality conditioner (UPQC) is proposed to compensate for voltage flicker/imbalance, reactive power, negative-sequence current and harmonics.
Proceedings ArticleDOI
Stationary frame current regulation of PWM inverters with zero steady state error
D.N. Zmood,Donald Grahame Holmes +1 more
TL;DR: In this paper, a new type of stationary frame controller is proposed, which achieves the same steady state performance as a synchronous frame controller, and is applicable to both single phase and three phase inverters.
Proceedings ArticleDOI
Stationary-frame generalized integrators for current control of active power filters with zero steady-state error for current harmonics of concern under unbalanced and distorted operating conditions
TL;DR: In this paper, the authors proposed several concepts of integrators for sinusoidal signals, including parallel and series associations of the basic PI units using the stationary frame generalized integrators, for current control of active power filters.
Journal ArticleDOI
Frequency domain analysis of three phase linear current regulators
TL;DR: In this article, a technique for interpreting the stationary/rotating frame transformations as modulation processes in the Laplace domain is presented, which moves the control function from one part of the frequency spectrum to another.
Journal ArticleDOI
A closed-loop selective harmonic compensation for active filters
TL;DR: In this paper, a control algorithm for parallel active power filters, based on current-controlled pulsewidth-modulated converters, which allows precise compensation of selected harmonic currents produced by distorting loads is proposed.