Journal ArticleDOI
A New Control Philosophy for a Unified Power Quality Conditioner (UPQC) to Coordinate Load-Reactive Power Demand Between Shunt and Series Inverters
Vinod Khadkikar,Ambrish Chandra +1 more
TLDR
In this paper, the authors proposed a new functionality of UPQC in which both the shunt and series APFs supply the load-reactive power demand, which not only helps to share the load reactive power demand but also helps to reduce the SHunt APF rating.Abstract:
This paper presents a novel philosophy to compensate the load-reactive power demand through a three-phase unified power quality conditioner (UPQC). Most of the UPQC-based applications show the dependency on shunt inverter for load-reactive power compensation, whereas the series inverter is always looked as controlled voltage source to handle all voltage-related problems. This paper proposes a new functionality of UPQC in which both the shunt and series APFs supply the load-reactive power demand. This feature not only helps to share the load-reactive power demand, but also helps to reduce the shunt APF rating, and hence, the overall cost of UPQC. This results in better utilization of the existing series inverter. The theory and complete mathematical analysis termed as ldquopower angle control (PAC)rdquo is presented. The simulation results based on MATLAB/Simulink are discussed in detail to support the concept developed in the paper. The proposed approach is also validated through experimental study.read more
Citations
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Journal ArticleDOI
Enhanced PLL based SRF control method for UPQC with fault protection under unbalanced load conditions
TL;DR: In this article, a three-phase four-wire unified power quality conditioner (UPQC) is realized by the integration of series and parallel active power filter (SAPF and PAPF) sharing a common dc bus capacitor.
Journal ArticleDOI
An On-Line Operational Optimization Approach for Open Unified Power Quality Conditioner for Energy Loss Minimization of Distribution Networks
Shubh Lakshmi,Sanjib Ganguly +1 more
TL;DR: An on-line operational optimization approach to determine the optimal reactive power/volt-ampere reactive (VAr) set points for open unified power quality conditioner (UPQC-O) under varying load demand of a distribution network is presented.
Journal ArticleDOI
Fixed and variable power angle control methods for unified power quality conditioner: operation, control and impact assessment on shunt and series inverter kVA loadings
TL;DR: In this article, the power angle, a resultant angle between actual source voltage and resultant load voltage, is used as a control variable, which can affect the overall kVA loadings of shunt and series inverters.
Journal ArticleDOI
Unified power quality conditioner allocation for reactive power compensation of radial distribution networks
TL;DR: In this article, a unified power quality conditioner (UPQC) allocation for reactive power compensation of radial distribution networks based on phase angle control has been proposed, where the series inverter injects a voltage with controllable phase angle in such a way that the voltage magnitude at load end remains unchanged.
Journal ArticleDOI
An improved control method for unified power quality conditioner with unbalanced load
TL;DR: An improved control method for Unified Power Quality Conditioner with unbalanced load is proposed, which avoids circulation of reactive power and unnecessary VA burden on UPQC and employs a ‘mean block’ (moving average) at output of PI controller, which ensures balanced and harmonic free source currents.
References
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Book
Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems
TL;DR: The Flexible AC Transmission System (FACTS)—a new technology based on power electronics—offers an opportunity to enhance controllability, stability, and power transfer capability of ac transmission systems.
Journal ArticleDOI
A review of active filters for power quality improvement
TL;DR: This paper presents a comprehensive review of active filter configurations, control strategies, selection of components, other related economic and technical considerations, and their selection for specific applications.
Journal ArticleDOI
New trends in active filters for power conditioning
TL;DR: In this article, the authors present the present status of active filters based on state-of-the-art power electronics technology, and their future prospects and directions toward the 21st Century, including the personal views and expectations of the author.
Journal ArticleDOI
The unified power quality conditioner: the integration of series- and shunt-active filters
Hideaki Fujita,Hirofumi Akagi +1 more
TL;DR: In this paper, a unified power quality conditioner (UPQC) is proposed to compensate for voltage flicker/imbalance, reactive power, negative-sequence current and harmonics.
Journal ArticleDOI
Unified power-flow control concept for flexible AC transmission systems
TL;DR: In this article, the authors outline the technical and economic factors which characterise the uniform, all solid-state power-flow controller approach for real-time controlled, flexible AC transmission systems.
Related Papers (5)
The unified power quality conditioner: the integration of series- and shunt-active filters
Hideaki Fujita,Hirofumi Akagi +1 more
UPQC-S: A Novel Concept of Simultaneous Voltage Sag/Swell and Load Reactive Power Compensations Utilizing Series Inverter of UPQC
Vinod Khadkikar,Ambrish Chandra +1 more