Comprehensive voltage and power factor control strategy for electric spring

Comprehensive voltage and power factor control strategy for electric spring

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Electric spring (ES) along with the smart load (SL) have recently been used as a smart technology for stabilising distribution networks. ESs are embedded on non-critical (NC) loads in order to protect critical loads against voltage fluctuations. Three different generations of ES have been developed in recent years. A comprehensive control scheme is proposed for the third generation of ES, through which the SL power factor and line voltage can be controlled. In order to control the power factor in steady-state condition, the radial-chordal decomposition (RCD) method, which has been previously used for the second generation, is employed in the closed-loop manner. The proposed controller has also the capability to mitigate the voltage fluctuation in over/under voltage condition. Simulation results show the superiority of this method in voltage control over RCD method. In addition, for a bunch of NC loads, the desired power factor will be reached at the point of common coupling.

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