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The nonlinear loads in distribution grid may generate harmful low-order harmonics, polluting the grid and deteriorating the voltage quality particularly when the grid is weak. The grid interfacing converters in the distribution system, such as the distributed generation (DG) interfacing converters or hybrid ac/dc grid interlinking converters, can participate in distribution grid harmonic control....
Embedding voltage harmonic compensation function in Distributed Generation (DG) systems is a promising solution for the increasing concern about power quality in distribution grid. This paper focuses on adding harmonic compensation function to these low switching frequency DG systems and applies a current feed forward method to overcome the bandwidth limit in their feedback control loop. The complex...
The increase of grid-tied distributed generators (DGs) and nonlinear loads may generate harmful low order harmonics, polluting the grid and deteriorating the operation of other power electronics based loads and DGs. In order to improve the output current of the voltage source inverter (VSI) in grid-tied DG system, two methods are proposed in this paper to compensate the output harmonic under distorted...
The rapid development of photovoltaic (PV) generation systems has made the low voltage ride-through (LVRT) techniques, which is stepping forward fast, more and more important. This paper presents a review of LVRT techniques for PV generation systems, which mainly focuses on the critical techniques of fault detection and grid synchronization, current control and dc-link voltage control under various...
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