AUTOR DO BLOG ENG.ARMANDO CAVERO MIRANDA SÃO PAULO BRASIL

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS DO MAL"

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS  DO MAL"

“SE SEUS PROJETOS FOREM PARA UM ANO,SEMEIE O GRÂO.SE FOREM PARA DEZ ANOS,PLANTE UMA ÁRVORE.SE FOREM PARA CEM ANOS,EDUQUE O POVO.”

“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance. Will Durant”

https://picasion.com/
https://picasion.com/

sábado, 11 de julho de 2020

Robust Renewable Energy System with Proper PCS Based on Bidirectional DAB Converter Topology and Uninterruptible Energy Storage System by Muhammad Adil Khan -Department of Electrical and Computer Engineering The Graduate School Pusan National University


Robust Renewable Energy System with Proper PCS Based on Bidirectional DAB Converter Topology and Uninterruptible Energy Storage System 
by Muhammad Adil Khan Dissertation for the degree of Doctor of Philosophy August 2018 
Department of Electrical and Computer Engineering 
The Graduate School Pusan National University

 ABSTRACT In the modern era, there is an increasing demand to utilize renewable energy resources (RES) due to the depletion of conventional energy resources. This research endeavor reports selection of an optimal RES system with the proper power conditioning system. Despite recent advances in RES systems, these systems are still more costly than conventional energy resources. Among them the use of solar photovoltaic (PV) electric systems is growing rapidly in the sustainable renewable energy market and is expected to play an important role in the future sustainable energy mix. Reducing the price of solar PV systems has been a constant challenge. For the first time, this study examines the effectiveness of three different structures/materials: (i) silvered glass plane mirror; (ii) convex spherical mirrors; and (iii) aluminum (Al) foil as reflector. Comparative analysis of four different cooling techniques, i.e., water sprinkling system, passive heat sink method, active air fan method, and closed loop method, for enhancement of output power was performed. A novel Bi reflector solar PV system (BRPVS) was suggested to control the working of the reflectors. The Al foil enhanced the power output compared to the others. In addition, the effect of using a reflector on the temperature of a solar PV system was studied. High operating temperatures resulted in a decrease in the maximum output power under the same solar radiation conditions. The combined enhancement of the output power by both Al foil BRPVS system and cooling system was almost 22.75– 38.55%. The dual active bridge isolated bidirectional DC-DC converter (DAB-IBDC) is one of the prime converters used in dual active bridge renewable energy storage system (RESS) applications, particularly where a high-power density is required. A 2 kW, 50 kHz digital control dual active bridge isolated bi-directional dc-dc converter (DAB-IBDC) was developed for interfacing the supercapacitor bank in standalone solar power system. A blended SPS-ESPS digital control algorithm was used for DAB-IBDC converter instead of using a traditional single-phase shift (SPS) control algorithm, which is commonly used for large input to output voltage varying applications. The proposed blended SPS-ESPS control algorithm achieved high power conversion efficiency during a large input to output voltage variation, over a traditional phase shift control algorithm by reducing the back-power flow and current stress in a circuit. A novel uninterruptible and environmental friendly solar-wind hybrid energy system (HES) for remote area having closed loop cooled-solar system (CLC-SS). The results validate that the optimized system’s energy cost (COE) is 0.26 $/kWh and the net present cost (NPC) of the system is $7110.53. Moreover, reducing the charging time of an electric wheelchair using a hybrid electric system (HES) composed of a supercapacitor (SC) bank and a lithium-ion battery with a fuzzy logic controller (FLC)-based fast charging system for Li-ion batteries and a fuzzy logic-based intelligent energy management system (FLIEMS) for controlling the power flow within the HES is detailed analyzed. The fast charging FLC was designed to drive the voltage difference (Vd) among the different cells of a multi-cell battery and the cell voltage (Vc) of an individual cell. These parameters (voltage difference and cell voltage) were used as input voltages to reduce the charge time and activate a bypass equalization (BPE) scheme. BPE was introduced in this research so that the battery operates within the safe voltage range. The charging time was reduced by 13.13 %, 12.26%, 13.60%, and 19.23% for IC, 1.5C, and 2.0C, respectively, using FLC charger discussed in this research compared with conventional CC-CV charging.

Nenhum comentário:

Postar um comentário