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Overview of Control and Grid Synchronization for Distributed Power Generation Systems

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TLDR
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.
Abstract
Renewable energy sources like wind, sun, and hydro are seen as a reliable alternative to the traditional energy sources such as oil, natural gas, or coal. Distributed power generation systems (DPGSs) based on renewable energy sources experience a large development worldwide, with Germany, Denmark, Japan, and USA as leaders in the development in this field. Due to the increasing number of DPGSs connected to the utility network, new and stricter standards in respect to power quality, safe running, and islanding protection are issued. As a consequence, the control of distributed generation systems should be improved to meet the requirements for grid interconnection. This paper gives an overview of the structures for the DPGS based on fuel cell, photovoltaic, and wind turbines. In addition, control structures of the grid-side converter are presented, and the possibility of compensation for low-order harmonics is also discussed. Moreover, control strategies when running on grid faults are treated. This paper ends up with an overview of synchronization methods and a discussion about their importance in the control

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Citations
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References
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Proceedings ArticleDOI

Transient operation of grid-connected voltage source converter under unbalanced voltage conditions

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TL;DR: In this article, a complete analysis of a synchronous front-end PWM rectifier-inverter system under unbalanced input voltage conditions is presented, including the harmonic assessment of input/output current and voltage waveforms.
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Stationary frame harmonic reference generation for active filter systems

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A simple, novel method for variable-hysteresis-band current control of a three phase inverter with constant switching frequency

TL;DR: In this paper, a variable hysteresis band current controller is described, which achieves constant switching frequency without requiring a precise knowledge of the motor parameters and can be readily implemented in hardware.
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A novel control method for input output harmonic elimination of the PWM boost type rectifier under unbalanced operating conditions

TL;DR: In this article, a new control strategy to improve the performance of the PWM boost type rectifier when operating under an unbalanced supply is presented, resulting in a smooth (constant) power flow from AC to DC side in spite of the unbalanced voltage condition.
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