Journal ArticleDOI
A Two Degrees of Freedom Resonant Control Scheme for Voltage-Sag Compensation in Dynamic Voltage Restorers
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TLDR
In this paper, a two-degree-of-freedom (2DOF) control scheme for voltage compensation in a dynamic voltage restorer (DVR) power circuit is presented.Abstract:
This paper presents a two degrees of freedom (2DOF) control scheme for voltage compensation in a dynamic voltage restorer (DVR). It commences with the model of the DVR power circuit, which is the starting point for the control design procedure. The control scheme is based on a 2DOF structure implemented in a stationary reference frame ( $\alpha \text{--}\beta$ ), with two nested controllers used to obtain a passband behavior of the closed-loop transfer function, and is capable of achieving both a balanced and an unbalanced voltage-sag compensation. The 2DOF control has certain advantages with regard to traditional control methods, such as the possibility of ensuring that all the poles of the closed-loop transfer function are chosen without the need for observers and reducing the number of variables to be measured. The use of the well-known double control-loop schemes that employ feedback current controllers to reduce the resonance of the plant is, therefore, unnecessary. A simple control methodology permits the dynamic behavior of the system to be controlled and completely defines the location of the poles. Furthermore, extensive simulations and experimental results obtained using a 5-kW DVR laboratory prototype show the good performance of the proposed control strategy.read more
Citations
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Journal ArticleDOI
Dynamic voltage restore based on switched-capacitor multilevel inverter with ability to compensate for voltage drop, harmonics, and unbalancing simultaneously
TL;DR: In this paper , a new compensator is introduced, which can simultaneously operate as a series active power filter (SAPF) and a dynamic voltage restore (DVR) to mitigate the voltage drop, harmonics, and unbalance.
Journal ArticleDOI
A novel intrinsic space vector transformation based solar fed dynamic voltage restorer for power quality improvement in distribution system
TL;DR: An Intrinsic Space Vector Transformation (ISVT) based solar fed Dynamic Voltage Restorer (DVR) is connected in series with the power grid to compensate for the reactive power and is compared with other existing methods.
Journal ArticleDOI
Power Quality Improvement in Distribution System Based on Dynamic Voltage Restorer Using Rational Energy Transformative Optimization Algorithm
L. Nagarajan,M. Senthilkumar +1 more
TL;DR: The proposed work aims to reduce the previous effects and improve power quality along with Dynamic Voltage Restorer (DVR), which is implemented in this work to eliminate voltage sags, swells, and harmonics.
Journal ArticleDOI
Hybrid Reference Current Generation Theory for Solar Fed UPFC System
TL;DR: The problems of load voltage, source current, and power factors are mitigated by utilizing the unified power flow controller (UPFC), in which a combination of series and shunt converters are combined through a DC-link capacitor.
Journal ArticleDOI
Fully Adaptive Recurrent Neuro-Fuzzy Control for Power System Stability Enhancement in Multi Machine System
TL;DR: In this article , an adaptive neurofuzzy based recurrent wavelet control (ANRWC) scheme was proposed to enhance the power system stability, which utilizes recurrent Gaussian as antecedent part's membership function and recurrent Wavelet function in consequent parts.
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