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In most of the situations, power electronics converters are mainly used as an interfacing device between distributed generation (DG) system and utility grid in order to meet the following objectives: 1) grid synchronization 2) active and reactive power control through voltage and frequency control 3) improvement of power quality (i.e. harmonic elimination) etc. But due to wide variation of the reactive...
Inverters are a universal interface to inject the power produced by distributed power generation in stand-alone loads, micro-grid or the main electrical grid. The control system of a universal inverter should be designed in order to manage the different connections. This paper is an attempt to provide an overview with attention paid to current/voltage control of the converter and direct/inverse droop...
According to power quality problems generated in micro-grid operation, micro-source grid-connected inverter control method based on an advanced f - Q, V - Q droop characteristic control method is put forward in the paper. By voltage frequency and amplitude restoration link, both of external voltage loop and internal current loop adopt feed-forward approximate decoupling control strategy. It not only...
This paper presents a review of some techniques for islanding detection, especially by using inverter based DG applications and it also focuses on several islanding detection methods for a single-phase current-control voltage inverter working with a PV system connected into the grid. It is deliberated a single-phase inverter with maximum power of 5 kW. Islanding detection methods are investigated,...
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