Design procedure for the LPF of a three-phase SPWM VSC operating with a wide range of output power, voltage and frequency with low harmonic distortion

2018 ◽  
Author(s):  
Karin R. Feistel ◽  
Luiz A. C. Lopes
Keyword(s):  
Output Power ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Three Phase ◽  
Wide Range

Reduced Rating 30-pulse AC-DC Converter for Power Quality Improvement

2017 ◽  
Vol 6 (3) ◽  
pp. 199 ◽  
Author(s):  
Rohollah Abdollahi
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Quality Criteria ◽  
Motor Drives ◽  
Unity Power Factor ◽  
Wide Range ◽  
Bridge Rectifier ◽  
Power Quality Improvement ◽  
Point Of Common Coupling

This paper presents the design and analysis of a novel polygon connected autotransformer based 30-phase ac-dc converter which supplies Direct Torque Controlled Induction Motor Drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The proposed converter output voltage is accomplished via three paralleled 10- pulse ac-dc converters each of them consisting of 5-phase diode bridge rectifier. An autotransformer is designed to supply the rectifiers. The proposed converter requires only three inter-phase transformers in the dc link that leads to the reduced kilovolt ampere rating, size, weight, and cost of the proposed rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The aforementioned structure improves power quality criteria at ac mains and makes them consistent with the IEEE-519 standard requirements for varying loads. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current Total Harmonic Distortion (THD) is less than 3% for the proposed topology at variable loads.

scholarly journals Design and construction of a polygon-connected autotransformer-based 36-pulse AC-DC converter for power quality improvement in retrofit applications

2015 ◽  
Vol 63 (2) ◽  
pp. 353-362 ◽  
Author(s):  
R. Abdollahi
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Quality Criteria ◽  
Simulation Models ◽  
Unity Power Factor ◽  
Wide Range ◽  
Bridge Rectifier ◽  
Power Quality Improvement ◽  
Point Of Common Coupling

Abstract This paper presents the design and analysis of a polygon connected autotransformer based 36-phase AC-DC converter which supplies direct torque controlled induction motor drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The proposed converter output voltage is accomplished via two paralleled eighteen-pulse AC-DC converters each of them consisting of nine-phase diode bridge rectifier. An autotransformer is designed to supply the rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure improves power quality criteria at ac mains and makes them consistent with the IEEE-519 standard requirements for varying loads. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 4% for the proposed topology at variable loads. A laboratory prototype of the proposed Polygon-Connected autotransformer-based 36-pulse AC-DC converter is developed and test results are presented to validate the developed design procedure and the simulation models of this AC-DC converter under varying loads

scholarly journals Discrete Fundamental AC Voltage Controller for Three-Phase Standalone Converters

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 650
Author(s):  
Alejandro García-Fernández ◽  
Jesús Doval-Gandoy ◽  
Diego Pérez-Estévez
Keyword(s):  
State Space ◽  
Closed Loop ◽  
Design Procedure ◽  
Pole Placement ◽  
Discrete State ◽  
Voltage Controller ◽  
Three Phase ◽  
Wide Range ◽  
Lc Filter ◽  
Output Filter

Voltage control of standalone converters with LC filter is usually based on proportional-resonant or proportional-integral controllers, which often require further active damping methods to achieve stability. These solutions place design constraints in the selection of the closed-loop pole locations which limit the achievable bandwidth and increase the design complexity. In contrast, in state-space based controllers, the closed-loop poles can be placed freely through state feedback, which makes them particularly suitable for high order plants and/or low sampling frequencies. Among the modern control methods, direct pole placement is a simple technique that enables the establishment of a straightforward relationship between outcome and design, as opposed to more advanced approaches. This paper presents a discrete state-space voltage controller for standalone converters with LC output filter. The proposed method combines the direct pole placement technique with a virtual disturbance observer in order to compensate the effects produced by the load and model mismatches. The design process takes into account both the filter parameters and the sampling frequency, rendering the performance of the obtained controller independent of both. The result is a streamlined design procedure that leads to consistent outcomes for a wide range of plant parameter variations, requiring only one input: the desired closed-loop bandwidth.

scholarly journals Two-level inverter and three-level neutral point diode clamped inverter for traction applications: a comparative analysis study

2021 ◽  
Vol 12 (3) ◽  
pp. 1609
Author(s):  
Asmaa A. Abdelsalam ◽  
Mohamed Adel Esmaeel ◽  
Salama Abo Zaid
Keyword(s):  
Induction Motor ◽  
Electric Vehicle ◽  
Full Range ◽  
Harmonic Distortion ◽  
Neutral Point ◽  
Angle Distribution ◽  
Simulink Model ◽  
Steady State Operation ◽  
Three Phase ◽  
Wide Range

<span>This paper presents an analytical comparison between two-level inverter and three-level neutral point diode clamped inverters for electric vehicle traction purposes. The main objective of the research is to declare the main differences in the performance of the two inverter schemes in terms of the switching and conduction losses over an entire domain of the modulation index and the phase angle distribution, steady-state operation, transient operation at a wide range of speed variation, and the total harmonic distortion THD% of the line voltage output waveform. It also declares the analysis of the three-level neutral point diode clamped inverter (NPCI) obstacle and the unbalance of the DC-link capacitor voltages. The introduced scheme presents an Induction Motor (IM) drive for electric vehicle (EV) applications. Considering the dynamic operation of the EV, the speed of the three-phase induction motor is controlled using a scalar V/Hz control for the full range of the IM power factor (PF). A comprehensive MATLAB/Simulink model for the proposed scheme is established.</span>

Design and Experimental Verification of 20-Pulse AC–DC Converter for Retrofit Applications and Harmonic Mitigation

2017 ◽  
Vol 26 (10) ◽  
pp. 1750147 ◽  
Author(s):  
Rohollah Abdollahi
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Quality Criteria ◽  
Simulation Models ◽  
Motor Drives ◽  
Unity Power Factor ◽  
Wide Range ◽  
Bridge Rectifier ◽  
Point Of Common Coupling

This paper presents the design and analysis of a polygon-connected autotransformer based 20-pulse AC–DC converter which supplies direct torque-controlled induction motor drives (DTCIMDs) in order to have better power quality conditions at the point of common coupling. The proposed converter output voltage is accomplished via two paralleled 10-pulse AC–DC converters each of them consisting of five-phase diode bridge rectifier. An autotransformer is designed to supply the rectifiers. The design procedure of magnetics is in such a way that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure improves power quality criteria at AC mains and makes them consistent with the IEEE-519 Standard requirements for [Formula: see text]. Furthermore, near-unity power factor is obtained for a wide range of DTCIMD operations. A comparison is made between six-pulse and proposed converters from the viewpoint of power quality indices. Results show that input current total harmonic distortion (THD) is less than 8% for the proposed topology at variable loads. A laboratory prototype of the proposed polygon-connected autotransformer-based 20-pulse AC–DC converter is developed and test results are presented to validate the developed design procedure and the simulation models of this AC–DC converter under varying loads.

scholarly journals Wide Frequency Band Single-Phase Amplitude and Phase Angle Detection Based on Integral and Derivative Actions

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1578
Author(s):  
Luccas M. Kunzler ◽  
Luiz A. C. Lopes
Keyword(s):  
Phase Angle ◽  
Single Phase ◽  
Design Procedure ◽  
Active Power Filters ◽  
Power Filters ◽  
Frequency Detection ◽  
Three Phase ◽  
Wide Range ◽  
Phase Amplitude ◽  
Frequency Detector

Numerous applications, such as the synchronization of distributed energy resources to an existing AC grid, the operation of active power filters or the amplification of signals for Power-Hardware-In-The-Loop (PHIL) systems require a few tasks in common. Amplitude, phase angle and frequency detection are crucial for all these applications and many more. Various techniques are presented for three-phase and single-phase applications but only a few of them are able to identify the signals’ attributes for a wide range of frequencies and amplitudes. Single-phase systems are typically burdensome, considering the challenge to create an internal signal, orthogonal with the input, in order to perform the phase angle detection. This matter is even more critical when the amplitude and frequency of the input signal varies in a wide range. This paper presents an Orthogonal Signal Generator (OSG) based on integral and derivative actions. It includes a detailed design procedure and a design example. The performance of a single-phase wide range amplitude and frequency detector based on the discussed OSG is experimentally validated under steady state and dynamic conditions.

Study of delta/polygon-connected transformer-based 36-pulse ac-dc converter for power quality improvement

2012 ◽  
Vol 61 (2) ◽  
pp. 277-292 ◽  
Author(s):  
Rohollah Abdollahi
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Quality Indices ◽  
Unity Power Factor ◽  
Wide Range ◽  
Bridge Rectifier ◽  
Power Quality Improvement ◽  
Point Of Common Coupling

Study of delta/polygon-connected transformer-based 36-pulse ac-dc converter for power quality improvementDesign of a delta/polygon-connected autotransformer based 36-pulse ac-dc converter is presented in this paper. The 36-pulse topology is obtained via two paralleled eighteen-pulse ac-dc converters each of them consisting of a nine-phase (nine-leg) diode bridge rectifier. For independent operation of paralleled diode-bridge rectifiers, two interphase transformers (IPT) is designed and implemented. A transformer is designed to supply the rectifier. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. The proposed structure has been implemented and simulated using Matlab/Simulink software under different load conditions. Simulation results confirmed the significant improvement of the power quality indices (consistent with the IEEE-519 standard requirements) at the point of common coupling. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 4% for the proposed topology at variable loads.

scholarly journals Pulse doubling in zigzag–connected autotransformer–based 12–pulse ac–dc converter for power quality improvement

2012 ◽  
Vol 63 (6) ◽  
pp. 357-364 ◽  
Author(s):  
Rohollah Abdollahi
Keyword(s):  
Power Quality ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Design Procedure ◽  
Quality Criteria ◽  
Wide Range ◽  
Bridge Rectifier ◽  
Power Quality Improvement ◽  
Point Of Common Coupling ◽  
Zero Sequence

This paper presents a pulse doubling technique in a 12-pulse ac-dc converter which supplies direct torque controlled motor drives (DTCIMDs) in order to have better power quality conditions at the point of common coupling. The proposed technique increases the number of rectification pulses without significant changes in the installations and yields in harmonic reduction in both ac and dc sides. The 12-pulse rectified output voltage is accomplished via two paralleled six-pulse acdc converters each of them consisting of three-phase diode bridge rectifiers. An autotransformer is designed to supply the rectifiers. The design procedure of magnetics is in a way such that makes it suitable for retrofit applications where a six-pulse diode bridge rectifier is being utilized. Independent operation of paralleled diode-bridge rectifiers, i.e. dc-ripple re-injection methodology, requires a Zero Sequence Blocking Transformer (ZSBT). Finally, a tapped interphase reactor is connected at the output of ZSBT to double the pulse numbers of output voltage up to 24 pulses. The aforementioned structure improves power quality criteria at ac mains and makes them consistent with the IEEE-519 standard requirements for varying loads. Furthermore, near unity power factor is obtained for a wide range of DTCIMD operation. A comparison is made between 6-pulse, 12-pulse, and proposed converters from view point of power quality indices. Results show that input current total harmonic distortion (THD) is less than 5% for the proposed topology at various loads.

scholarly journals Quadrature Voltage Compensation in the Isolated Multi-Modular Converter

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 529
Author(s):  
Cristian Verdugo ◽  
Jose Ignacio Candela ◽  
Pedro Rodriguez
Keyword(s):  
Control Strategy ◽  
Phase Voltage ◽  
Multilevel Converters ◽  
Photovoltaic Panels ◽  
Circulating Current ◽  
Three Phase ◽  
Voltage Compensation ◽  
Wide Range ◽  
Modular Converter ◽  
The Impact

Series connections of modules in cascaded multilevel converters are prone to power imbalances due to voltage differences on their DC side. When modules are connected to direct current (DC) sources, such as photovoltaic panels, the capability of withstanding power imbalances is crucial for generating the maximum power. In order to provide a possible solution for this requirement, this paper proposes a control strategy called Quadrature Voltage Compensation, which allows a wide range of power imbalances. The proposed control strategy regulates the power by introducing a circulating current between the arms and a phase angle in the output voltage. The impact of the circulating current and its effect on the phase voltage are studied. To highlight the features of the proposed strategy, an analytical model based on vector superposition is also described, demonstrating the strong capability of tolerating power differences. Finally, to validate the effectiveness of the Quadrature Voltage Compensation, simulation and experimental results are presented for a three-phase isolated multi-modular converter.

scholarly journals Hybrid Three-Phase Rectifiers with Active Power Factor Correction: A Systematic Review

Electronics ◽  
2021 ◽  
Vol 10 (13) ◽  
pp. 1520
Author(s):  
José Teixeira Gonçalves ◽  
Stanimir Valtchev ◽  
Rui Melicio ◽  
Alcides Gonçalves ◽  
Frede Blaabjerg
Keyword(s):  
Power Factor ◽  
Power Distribution ◽  
Harmonic Distortion ◽  
International Standards ◽  
Pwm Converter ◽  
High Power Factor ◽  
Three Phase ◽  
Sinusoidal Input ◽  
Converter Topologies ◽  
Future Direction

The hybrid three-phase rectifiers (HTR) consist of parallel associations of two rectifiers (rectifier 1 and rectifier 2), each one of them with a distinct operation, while the sum of their input currents forms a sinusoidal or multilevel waveform. In general, rectifier 1 is a GRAETZ (full bridge) (can be combined with a BOOST converter) and rectifier 2 is combined with a DC-DC converter. In this HTR contest, this paper is intended to answer some important questions about those hybrid rectifiers. To obtain the correct answers, the study is conducted as an analysis of a systematic literature review. Thus, a search was carried out in the databases, mostly IEEE and IET, and 34 papers were selected as the best corresponding to the HTR theme. It is observed that the preferred form of power distribution in unidirectional hybrid three-phase rectifiers (UHTR) is 55%Po (rectifier 1) and 45%Po (rectifier 2). For the bidirectional hybrid three-phase rectifiers (BHTR), rectifier 1 preferably takes 90% of Po and 10% of Po is processed by rectifier 2. It is also observed that the UHTR that employ the single-ended primary-inductor converter (SEPIC) or VIENNA converter topologies in rectifier 2 can present sinusoidal input currents with low total harmonic distortion (THD) and high Power Factor (PF), even successfully complying with the international standards. The same can be said about the rectifier that employs a pulse-width (PWM) converter of BOOST topology in rectifier 2. In short, the HTR are interesting because they allow using the GRAETZ full bridge topology in rectifier 1, thus taking advantage of its characteristics, being simple, robust, and reliable. At the same time, the advantages of rectifier 2, i.e., high PF and low THD, are well used. In addition, this article also points out the future direction of research that is still unexplored in the literature, thus giving opportunities for future innovation.

Sign in / Sign up

Export Citation Format

Share Document