A 28-Pulse AC-DC Converter Based SMPS for Telecom Power Supply

2010 ◽  
Vol 11 (4) ◽  
Author(s):  
R. Kalpana ◽  
G. Bhuvaneswari ◽  
Bhim Singh ◽  
Shikha Singh ◽  
Sanjay Gairola
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Power Supply ◽  
Simulated Performance ◽  
Harmonic Currents ◽  
Point Of Common Coupling ◽  
Common Coupling ◽  
Switched Mode Power Supply ◽  
Laboratory Prototype ◽  
Wide Operating

This paper presents a new 28-pulse ac-dc converter for enhancing the power quality at the point of common coupling, while feeding a medium capacity switched mode power supply (SMPS). It consists of two series connected 14-pulse ac-dc uncontrolled converters fed by seven phase-shifted ac voltages. The proposed converter is found capable of suppressing up to 27 harmonic currents in the ac mains. The power factor is also improved to near unity over a wide operating range of the SMPS. The design and analysis of the proposed ac-dc converter is carried-out in detail. A laboratory prototype of the autoconnected transformer based 28-pulse ac-dc converter is developed, and various tests have been conducted on it to validate the simulated performance of the proposed converter. Several experimental results are also included to show the effectiveness and robustness of the proposed converter.

Power Factor Corrected Zeta Converter Based Improved Power Quality Switched Mode Power Supply

2015 ◽  
Vol 62 (9) ◽  
pp. 5422-5433 ◽  
Author(s):  
Shikha Singh ◽  
Bhim Singh ◽  
G. Bhuvaneswari ◽  
Vashist Bist
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Power Supply ◽  
Switched Mode Power Supply

scholarly journals Improved Power Quality Switched Mode Power Supply Using Buck-Boost Converter

2021 ◽  
pp. 824-831
Author(s):  
Hariharan P ◽  
Dr. Ranjithkumar K
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Power Supply ◽  
Fuzzy Logic Controller ◽  
Power Factor Correction ◽  
Boost Converter ◽  
Boost Converters ◽  
Current Harmonics ◽  
Front End ◽  
Switched Mode Power Supply

In this work, The devices generally used in industrial, commercial and residential applications need to undergo rectification for their proper functioning and operation. The operation of the buck– boost converter in discontinuous conduction mode ensures inherent PFC operation and reduces complexity in control. Hence there is a need to reduce the line current harmonics so as to improve the power factor of the system. This has led to designing of Power Factor Correction circuits. This concept presents a power factor corrected (PFC) Buck–Boost converter-fed SMPS. This project deals with the design, analysis, simulation, and development of a power-factor-correction (PFC) multiple output switched-mode power supply (SMPS) using a Buck–Boost converter at the front end. Single-phase ac supply is fed to a pair of back-to-back connected buck–boost converters to eliminate the diode bridge rectifier, which results in reduction of conduction losses and power quality improvement at the front end. To observe the performance of this converter, a model based on the Buck Boost topology has been designed and developed software and implemented with Proportional-Integral (PI) and Fuzzy logic controller. The simulations are demonstrated in order to validate the effectiveness of the controllers in power factor improvement. By using MATLAB.

Assessment of power quality parameters and indicators at the point of common coupling in a low voltage power grid with photovoltaic generation emulated

2022 ◽  
Vol 203 ◽  
pp. 107679
Author(s):  
Oscar Pinzón-Quintero ◽  
Daniel Gaviria-Ospina ◽  
Alejandro Parrado-Duque ◽  
Rusber Rodríguez-Velásquez ◽  
German Osma-Pinto
Keyword(s):  
Power Quality ◽  
Low Voltage ◽  
Power Grid ◽  
Quality Parameters ◽  
Photovoltaic Generation ◽  
Point Of Common Coupling ◽  
Common Coupling

Power Quality Assessment and Enhancement in a Grid Connected Renewable Energy System Using Dynamic Voltage Restorer

2014 ◽  
Vol 573 ◽  
pp. 716-721
Author(s):  
S. Rajeshbabu ◽  
B.V. Manikandan
Keyword(s):  
Neural Network ◽  
Renewable Energy ◽  
Power Quality ◽  
Energy System ◽  
Dynamic Voltage Restorer ◽  
Renewable Energy System ◽  
Voltage Restorer ◽  
Point Of Common Coupling ◽  
Dynamic Voltage ◽  
Common Coupling

Renewable energy sources provide the additional/satisfy the power to the consumer through power electronics interfaces and integrated with the grid. In grid integration power quality is one of the important parameter that need to be paying more attention. This proposed work focuses on power quality issues in a grid connected renewable energy system. Power quality issues will arises due to many factors here with the by introducing a fault condition in a grid connected renewable energy system the measurements were made at the point of common coupling and the mitigation is done with the help of a dynamic voltage restorer. The dynamic voltage restorer is a device which offers series compensation activated by neural network based controller. The sag improvement and the total harmonic assessment were made at the point of common coupling. Keywords: Neural network, Point of common coupling, Renewable energy source, Power quality, Dynamic voltage restorer ,electric grid.

scholarly journals Problems of the Estimation of the Consumer’s Contribution to the Power Quality Distortion in the Point of Common Coupling

2017 ◽  
pp. 12-19 ◽  
Author(s):  
Dmitrii V. DVORKIN ◽  
◽  
Maxim A. SILAYEV ◽  
Vladimir N. TUL’SKII ◽  
Stefan PALIS ◽  
...  
Keyword(s):  
Power Quality ◽  
Point Of Common Coupling ◽  
Common Coupling

Determining Harmonic Contributions Based on Reweighted Complex Least Squares Method

2013 ◽  
Vol 448-453 ◽  
pp. 2660-2666
Author(s):  
Hui Chun Hua ◽  
Xiu Fang Jia ◽  
Hai Qing An ◽  
Shao Guang Zhang
Keyword(s):  
Quality Management ◽  
Least Squares ◽  
Power Quality ◽  
Least Squares Method ◽  
Test System ◽  
Important Task ◽  
Reasonable Result ◽  
Point Of Common Coupling ◽  
Common Coupling

Determining harmonic contribution quantitatively at the point of common coupling is an important task for power quality management. Outliers and influential points could have strong influences on regressors. This paper puts forward a method named reweighted complex least squares to eliminate or reduce the influences to ensure the robustness of the regression. The method can improve precision of the equivalent harmonic impedance and it can get a more reasonable result in harmonic contribution determination than previous methods. A case study based on the IEEE 14-bus test system was conducted, which shows the validity of the proposed method.

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