A Robust and Flexible Controller Based on Minimum Active Power Injection to Precise Tracking of Load Variation to Compensate Voltage Sag

Majlesi Journal of Electrical Engineering

مقاله 8، دوره 11، شماره 1، خرداد 2017   

نوع مقاله: Review Article

نویسندگان

Ali Darvish Falehi^{* 1}؛ Mansour Rafiee²

¹Department of Electrical Engineering, Shahid Beheshti University, Tehran, IRAN

²Department of Electrical Engineering, Shahid Beheshti University, Tehran, Iran

چکیده

From the viewpoint of technology-driven custom apparatus, the dynamic voltage restorer (DVR) has been identified to be the most prominent device which can be engaged to compensate the voltage sag. On the other hand, this device has been customarily used in power distribution system to protect sensitive loads from sudden voltage sag. Owing to the restriction of energy storage in DVR's capacitors, it is essential that the active power injection by DVR to be reduced. As a consequence, this energy-saving strategy leads to the injecting the larger voltage magnitude and reactive power, shifting the phase, and cluttering the voltage wave shape. In the interim, this strategy is highly sensitive respect to variation in load’s power factor so that the compensating operation will not be properly done. In this regard, this paper suggests a robust controller based on minimum active power strategy in order to perfectly correct the voltage sag notwithstanding variation in load’s power factor. Likewise, the under-study DVR has been structured according to the cascaded H-bridge multilevel inverter topology.

کلیدواژه‌ها

en

مراجع

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