The Voltage Control Strategy of a DC-Link Bus Integrated Photovoltaic Charging Module in a Unified Power Quality Conditioner

Ni, Fuyin; Li, Zhengming; Wang, Qi

doi:10.3390/en12101842

Cited by 4 publications

(3 citation statements)

References 28 publications

(22 reference statements)

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“…The series and shunt voltage source inverters of a UPQC are connected back-to-back via a common DC link and are responsible for regulating reactive power within the power system and aiding in the compensation performance of both series and shunt compensators [29]. Typically, at a steady state, the DC link voltage is maintained at a pre-set value.…”

Section: Operation Of the DC Linkmentioning

confidence: 99%

Unified Power Quality Conditioners Based Different Structural Arrangements: A Comprehensive Review

et al. 2023

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Mitigating power quality issues in distribution systems is of utmost importance to both electricity consumers and suppliers as it improves the distribution system's efficiency, reduces electricity costs, maintains continuous supply, and diminishes the requirement for frequent maintenance. Custom power devices were introduced to eliminate power quality issues like voltage sags, swells, transients, imbalances, and current harmonics arising in distribution systems. Unified power quality conditioner (UPQC) is one such frequently used custom power device that enhances the power quality of distribution systems. Various structural arrangements of UPQCs with improved performance capability were introduced within the last few decades. The main aim of this paper is to review the most frequently explored UPQC models in literature and to observe the impact of these UPQC structural configurations on their performance as well as that of the overall distribution system. Also, this study investigates the properties, applications, and control techniques used by these structural configurations of UPQCs to mitigate power quality issues.

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Section: Operation Of the DC Linkmentioning

confidence: 99%

Unified Power Quality Conditioners Based Different Structural Arrangements: A Comprehensive Review

et al. 2023

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“…[13]. As a solution, power electronic-based devices like the dynamic voltage restorer (DVR) [14], shunt and series active filter [15], static compensator [16], and unified power quality controller (UPQC) [17] are widely selected to resolve the PQ related problems. Still, due to the requirement of excess power electronic switches and fixed compensation, shunt active filter (SAF)-based voltage source inverters (VSIs) are selected for simple design, economy, and better performance [18].…”

Section: Evolutions Of Filters and Associated Problemsmentioning

confidence: 99%

Effective Harmonic Cancellation Technique for a Three-Phase Four-Wire System

Sahoo¹,

Alhaider

Rout

2022

Energies

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An excess non-linear and unbalanced load application increases the power quality (PQ) problem by injecting harmonic current. The avoidance of neutral current control creates additional PQ problems due to excess circulating current in modern 3φ4W applications. Therefore, this manuscript suggests improved αβ transform-based voltage and current control approaches for both 3φ3W and 3φ4W shunt active filter (SAF) applications. In the proposed approach, a novel combined voltage and current (NCVC) control approach is presented for modern 3φ3W systems by using voltage and closed-loop current controllers. However, due to the absence of a neutral current, the NCVC is not sufficient for 3φ4W system application. Therefore, by considering the current reference parameter generated from the NCVC, a novel harmonic compensation technique (NHCT) is proposed with proper mathematical expressions for the 3φ4W application. To show the importance of NHCT over traditional P-Q-R control, the developed MATLAB/Simulink model is tested by using different 1φ and 3φ nonlinear/unbalanced load conditions. The comparative results indicate that, by using NHCT, the 3φ4W system contains a lesser total harmonic distortion (THD) and harmonic mitigation ratio (HMR), less ripple frequency, an improved power factor, a lesser neutral current, and a balanced active/reactive power condition. From the above comparative analysis results, it is found that the overall improvement percentage is 66.78%. The above findings justify the significance of the NCVC and NHCT approach during both unbalanced and non-linear load-based 3φ4W applications.

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“…Unified power quality conditioner (UPQC) (Khadkikar 2012) uses a series active power filter (SAPF) and a parallel active power filter (PAPF), and it has the advantages of SAPF and PAPF for dealing with power quality problems. Therefore, it has gained considerable research interest in the power quality treatment field in recent years (Jiang et al 2014;Lee 2014, 2015;Pan and Zhu 2014;Ni et al 2019;Lü et al 2015).…”

Section: Introductionmentioning

confidence: 99%

A Harmonic Detection Method of UPQC Based on LSL Algorithm in Photovoltaic Microgrids

2020

J Control Autom Electr Syst

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Photovoltaic microgrids have discontinuity and intermittency issues that affect the load current amplitude and frequency, and this leads to disturbances. The unified power quality conditioner (UPQC) combines a series active power filter (SAPF) and a parallel active power filter (PAPF), and therefore, it has the advantages of SAPF and PAPF to treat power quality problems. Considering detection precision and response speed, and to meet the fast speed and accuracy of PAPF harmonic detection, the algorithm principle of adaptation and least-squares lattice (LSL) is analyzed. A new harmonic detection method of three-phase circuit based on LSL adaptive algorithm is proposed. The two other harmonic detection methods between least mean square and instantaneous power theory based are compared using the Simulink simulation platform. The compensation effect of LSL is more stable and better than the two other methods. The experimental results also indicate that the new method based on LSL can accurately detect and compensate the harmonic component in photovoltaic microgrids in real time. Therefore, this harmonic detection method based on LSL can be used in the practical engineering applications, and it provides a new method for harmonic detection of UPQC PAPF.

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The Voltage Control Strategy of a DC-Link Bus Integrated Photovoltaic Charging Module in a Unified Power Quality Conditioner

Cited by 4 publications

References 28 publications

Unified Power Quality Conditioners Based Different Structural Arrangements: A Comprehensive Review

Unified Power Quality Conditioners Based Different Structural Arrangements: A Comprehensive Review

Effective Harmonic Cancellation Technique for a Three-Phase Four-Wire System

A Harmonic Detection Method of UPQC Based on LSL Algorithm in Photovoltaic Microgrids

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