Abstract
The micro grids and the utility grid expose to their inner disturbance such as harmonics, unbalances and other power quality noises. To better isolate the device from their respective noises power quality conditioner is recommended between each micro grid and the utility grid. The cooperative control for enhance voltage harmonics and unbalances in micro grids is mentioned. The power quality enhancement of grid-interactive micro grids is discussed and explained. Power quality problem is reduced by means of using Unified Power Quality Conditioner (UPQC) in grid-connected micro grids is introduced in order to reduce harmonics in transmission and improve the power quality in distribution. Power quality problem includes voltage unbalances and harmonics. Interline Power Quality Conditioner (IPQC) is proposed to improve the power quality in multiline by reducing the harmonics and also unbalances of power in feeders by the process of synchronization. Finally, the coordinated control of harmonics and unbalances in micro grids is simulated by using MATLAB and the satisfactory results are obtained.
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