scholarly journals A Single-Stage Three Phase CT-Type MLI for Grid Integration and for Supplying Critical Loads

2021 ◽  
Vol 54 (5) ◽  
pp. 713-720
Author(s):  
Sumit Raj ◽  
Rajib Kumar Mandal ◽  
Mala De
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Power Supply ◽  
Critical Loads ◽  
Peak Load ◽  
Harmonic Distortion ◽  
Single Stage ◽  
Grid Integration ◽  
Solar Pv ◽  
Uninterrupted Power Supply

Power system reliability and resiliency involves availability of uninterrupted power supply to loads. With ever-increasing natural and man-made disturbances in power grid, the need of alternate renewable based source of supply is gaining more attention. This paper presents an efficient renewable energy-based single stage configuration for standalone application to provide uninterrupted power supply to critical loads in case of grid power interruption. This configuration can also be used for grid integration during peak load demand of power. The advancement in research of Multilevel Inverter (MLI) relating to high voltage with high power energy control enabled increased use of MLI in renewable energy, especially PV and fuel cell-based systems. The renewable energy-based configuration proposed in this paper uses Cross T-Type (CT-Type) MLI which provides quality output power from solar PV, fuel cell etc. Moreover, the absence of any DC-DC converter reduces complexity and makes the system more economical for grid integration. The overall system performance improves compared to existing methods in terms of total harmonic distortion (THD), total standing voltage (TSV), number of levels, number of components requirement and efficiency.

scholarly journals A Simple Power Management Scheme with Enhanced Stability for a Solar PV/Wind/Fuel Cell/Grid Fed Hybrid Power Supply Designed for Industrial Loads

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
S. Saravanan ◽  
S. Thangavel
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Power Management ◽  
Power Supply ◽  
Power Flow ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Solar Pv ◽  
Operating Characteristics ◽  
Pv Panel

This paper proposes a new power conditioner topology with an intelligent power management controller that integrates multiple renewable energy sources such as solar energy, wind energy, and fuel cell energy with battery and AC grid supply as backup to make the best use of their operating characteristics with better reliability than that could be obtained by single renewable energy source based power supply. The proposed embedded controller is programmed to perform MPPT for solar PV panel and WTG, SOC estimation and battery, maintaining a constant voltage at PCC and power flow control by regulating the reference currents of the controller in an instantaneous basis. The instantaneous variation in reference currents of the controller enhances the controller response as it accommodates the effect of continuously varying solar insolation and wind speed in the power management. It also prioritizes the sources for consumption to achieve maximum usage of green energy than grid energy. The simulation results of the proposed power management system with real-time solar radiation and wind velocity data collected from solar centre, KEC, and experimental results for a sporadically varying load demand are presented in this paper and the results are encouraging from reliability and stability perspectives.

A Hybrid Photovoltaic-Fuel Cell-Based Single-Stage Grid Integration With Lyapunov Control Scheme

2020 ◽  
Vol 14 (3) ◽  
pp. 3334-3342 ◽  
Author(s):  
Neeraj Priyadarshi ◽  
Sanjeevikumar Padmanaban ◽  
Mahajan Sagar Bhaskar ◽  
Frede Blaabjerg ◽  
Jens Bo Holm-Nielsen ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Single Stage ◽  
Grid Integration ◽  
Control Scheme ◽  
Lyapunov Control

SINGLE-STAGE SINGLE-SWITCHED RECTIFIER/REGULATOR WITH MAGNETIC COUPLED NONDISSIPATIVE SNUBBER

2004 ◽  
Vol 13 (03) ◽  
pp. 557-576
Author(s):  
CHUNG-WOOK ROH ◽  
GUN-WOO MOON ◽  
MYUNG-JOONG YOUN
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Factor Correction ◽  
Power Level ◽  
Harmonic Distortion ◽  
Voltage Regulation ◽  
Single Stage ◽  
Unity Power Factor ◽  
Forward Converter ◽  
Current Harmonic

This paper presents a new single-stage single-switched forward converter with magnetic coupled nondissipative snubber, which gives good power factor correction (PFC), low current harmonic distortion, and tight output voltage regulation. The proposed converter features low switch current and voltage stresses, essential for the design of a single-stage power factor correction converter. The prototype shows that the IEC1000-3-2 requirements are met satisfactorily with nearly unity power factor. This proposed converter with magnetic coupled nondissipative snubber is particularly suited for power supply applications with low power level.

Uninterrupted Power Supply to Micro-Grid During Islanding

2019 ◽  
pp. 96-126 ◽  
Author(s):  
Ruchi Chandrakar ◽  
Ruchita Nale ◽  
Monalisa Biswal
Keyword(s):  
Power Supply ◽  
Critical Loads ◽  
Communication Systems ◽  
Power Fluctuation ◽  
Major Purpose ◽  
Constant Frequency ◽  
Hybrid Energy ◽  
Uninterrupted Power Supply ◽  
Micro Grid ◽  
Uninterruptible Power

The major purpose of uninterruptible power supply (UPS) systems is to supply regulated sinusoidal voltage at constant frequency and amplitude. UPS systems are gaining much popularity as a means of providing clean and continuous electricity to critical loads during any disturbances in main grid. Modern equipment is sensitive to power fluctuation and requires back up power supply for optimal performance. This chapter introduces a set of possible solutions so that uninterrupted power supply can be provided to emergency feeders and critical loads such as hospitals and communication systems. Different network configurations can be applied to micro-grid system for obtaining an uninterrupted power supply. Various hybrid energy and modern UPS systems for micro-grid along with their control techniques have been elucidated. A comparative assessment of all UPS technologies on the basis of cost, performance, and efficiency of the system has been presented.

Single Stage Single Switch Power Supply (S4PS)Design for Low Power HB-LED Lighting

2013 ◽  
Vol 14 (1) ◽  
pp. 33-40
Author(s):  
Ashish Shrivastava ◽  
Bhim Singh
Keyword(s):  
Low Power ◽  
Power Quality ◽  
Power Supply ◽  
Light Emitting Diode ◽  
Harmonic Distortion ◽  
Input Power ◽  
Single Stage ◽  
Led Driver ◽  
Converter Topology ◽  
Conduction Mode

Abstract This paper presents an improved power quality converter (IPQC)-based power supply design for high brightness light emitting diode (HB-LED) low power lighting. The IPQC circuit uses a Cuk buck-boost converter to operate it in a discontinuous conduction mode (DCM) using the voltage follower technique for the mitigation of harmonic contents present in the AC mains current. Subsequently, reduction in harmonic contents results in improving the power quality indices at the AC mains. Single-stage single switch converter topology is used, which has less component count, size and cost as compared to the two-stage converter topology. DCM operation has an advantage that only output voltage control loop is required as compared to three control loops required in the continuous conduction mode operation. An 18-W LED driver is designed, modeled and simulated using MATLAB/Simulink software for 220 V, 50 Hz AC mains. The performance of the proposed LED driver is observed in terms of total harmonic distortion of the input current (THDi), input power factor (PF) and crest factor (CF) taking into account the strict international standard of IEC 61000-3-2 for class C equipments.

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