Journal ArticleDOI
A Two Degrees of Freedom Resonant Control Scheme for Voltage-Sag Compensation in Dynamic Voltage Restorers
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
ANN based Reference Voltage Generation Scheme for Control of Dynamic Voltage Restorer
TL;DR: In this article , the authors proposed an artificial neural network (ANN) based reference voltage generation (RVG) scheme for the control of 3-phase DVR, where the feed-forward ANN utilizes present and previous samples of supply voltage and peak magnitude of load voltage for RVG, which when impressed across the injection transformer results in sag/swell mitigation.
Journal ArticleDOI
Increasing the damping of oscillatory systems with an arbitrary number of time varying frequencies using fractional-order collocated feedback.
TL;DR: In this paper, the active damping of the oscillations of lightly damped linear systems whose parameters are indeterminate or may change through time is studied and the sensitivity of the gain crossover frequency to such variations is assessed.
Proceedings ArticleDOI
An Examination of The Adaline-Lms And VFP-LMS Control Algorithms' Effects on the Performance of a Single-Phase Digital Voltage Regulator
Garima Goswami,Kapilesh Jadhav +1 more
TL;DR: In this paper , a Unique Voltage Restorer (DVR) is used to control pile terminal voltages during different power quality issues, for example, staying at normal coupling focuses, commotion, and voltage irregularity increment.
References
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