Single-Phase to Three-Phase Unified Power Quality Conditioner Applied in Single-Wire Earth Return Electric Power Distribution Grids

Silva, Sérgio Augusto Oliveira da; Negrão, Fernando

doi:10.1109/tpel.2017.2723573

Cited by 39 publications

(21 citation statements)

References 21 publications

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“…Non‐sinusoidal currents and voltages references have been used to control the most UPQC applications . Therefore, it is indicated to employ any method for extraction the reference quantities …”

Section: Proposed Upqc Topology Descriptionmentioning

confidence: 99%

“…To overcome the most problems related to PQ, single‐phase and three‐phase series‐parallel active power‐line conditioners, known as unified power quality conditioners (UPQC), have been employed in there‐phase three‐ and four‐wire systems (3P3W and 3P4W) by means of different configurations and control strategies.…”

Section: Introductionmentioning

confidence: 99%

“…For control purposes, conventional strategies of power‐line compensating usually use non‐sinusoidal voltage/current references to control both voltages and currents of the series and the parallel converters . In this paper, the dual/inverted compensating strategy is adopted to control the parallel converter for acting as a sinusoidal voltage source and the series converter for working as a sinusoidal current source .…”

Section: Introductionmentioning

confidence: 99%

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Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Modesto

Silva

Oliveira

2020

Int Trans Electr Energ Syst

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Summary This work proposes a 3‐phase 4‐wire unified power quality conditioner (UPQC) structure, which has ability to operate with per‐phase independent grid current control, reduced dc‐bus voltage and inverted/dual compensation strategy. Since the grid currents are controlled by the series converter, two distinct strategies, namely, independent current compensation strategy (ICCS) and load unbalance compensation strategy (LUnCS) can be employed. Using the ICCS, the controls of the grid currents are performed independently per‐phase, such that the UPQC can operate even when grid voltage outage occurs in one or two phases of the power source. Furthermore, to guarantee the proper parallel converter operation, the dc‐bus voltage amplitude must be higher than the grid voltage peak amplitude. Thus, since the parallel converter operation is assured, the functioning of the series converter is also guaranteed because it needs lower dc‐bus amplitude to operate. However, depending on the converter topology adopted in the parallel converter, the series converter could be subjected to operate with dc‐bus voltage higher than necessary. Thus, to minimize this aspect, this paper proposes a UPQC scheme composed of 3‐Leg split‐capacitor (3‐Leg‐SC) and 4‐Leg topologies, operating as series and parallel converters, respectively. Thus, besides the use of the ICCS, lower dc‐bus voltage is allowed when compared to the UPQC composed of two 3‐Leg‐SC converters, as well as reduced power switches number is achieved when the propose scheme is compared to UPQC composed of two 4‐Leg converters. Extended experimental results based on digital signal controller are presented to evaluate the effectiveness and performance of the proposed UPQC.

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Section: Proposed Upqc Topology Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Modesto

Silva

Oliveira

2020

Int Trans Electr Energ Syst

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“…Fig. 4 shows the structure of the MAF consisting of the integration block, the delay block, the subtraction block and the division block [25]. The integration of the voltage signal is obtained by using the integration block.…”

Section: Moving Average Filter Mafmentioning

confidence: 99%

Low Total Harmonic Distortion and High Power Factor in Parallel Active Power Filter

Onal¹,

Ucgun²

2019

JSTR

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In a modern power system with the increasing use of power electronics components, nonlinear loads connected to the grid cause power quality problems. To overcome the power quality problems, the parallel active power filter PAPF is used in power systems. In this study, the synchronous reference frame based a new control algorithm is proposed for the three-phase PAPF system. In the proposed control algorithm, synchronous reference frame SRF method and moving average filter MAF filter and space vector pulse width modulation SV-PWM technique are used to obtain low total harmonic distortion and high power factor. SRF method and MAF filter are used to calculate the reference current signal. SV-PWM technique is used to obtain the switching signals of active switches used in power filters. In the proposed algorithm, the number of measurements is reduced and performance is increased by using source ab currents and ab voltages without filter abc currents and abc voltages and load abc currents. Simulation studies of the proposed control algorithm have been tested using PSIM software. According to the simulation results, it is seen that the proposed control algorithm is more successful in eliminating the harmonics in the source current and compensating the reactive power than the other control method used in the literature.

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“…The moving average filter (MAF) is used by [21] and [22] in the literature. In the study, the load currents and voltages are measured in the series-APF (S-APF) and parallel-APF (P-APF).…”

Section: Introductionmentioning

confidence: 99%

A New Controller for Photovoltaic Panel Fed Unified Power Quality Conditioner to Power Quality Improvement

Onal

2021

Mugla Journal of Science and Technology

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In this study, a new controller based on the synchronous reference frame (SRF) in a photovoltraic (PV) panel supported three-phase unified power quality conditioner (PV-UPQC) is proposed to solve power quality problems in power systems. The serial and parallel active power filters fed with energy by PV panels are used together in the PV-UPQC system. In the proposed controller, measurement values are taken from four different points of the power system. The obtained values and DC voltage generated by PV panels are used to calculate the reference current and voltage values. PWM signals of switches used in active filters are produced using moving average filter and space vector-PWM. The algorithm used in both filters consists of two parts. The first is the mppt algorithm, in which the maximum voltage is obtained from the PV panels, and the second is the SRF-based proposed algorithm, where the reference current or voltage is obtained. Simulation and experimental studies of the proposed controller are applied. When the results obtained are examined, the proposed controller for three-phase PV-UPQC gives better results than the traditional SRF based controller in attenuation of harmonics in current and voltage.

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Single-Phase to Three-Phase Unified Power Quality Conditioner Applied in Single-Wire Earth Return Electric Power Distribution Grids

Cited by 39 publications

References 21 publications

Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Three‐phase four‐wire unified power quality conditioner structure with independent grid current control and reduced dc‐bus voltage operating with inverted/dual compensating strategy

Low Total Harmonic Distortion and High Power Factor in Parallel Active Power Filter

A New Controller for Photovoltaic Panel Fed Unified Power Quality Conditioner to Power Quality Improvement

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