scholarly journals An Assessment Framework for PV Parallel MPPT Configuration with a New Utilization for UIPS Loads

2022 ◽  
Vol 17 ◽  
pp. 9-20
Author(s):  
Mostafa El-Sayed ◽  
Ahmed Huzayyin ◽  
Abdelmomen Mahgoub ◽  
Essam Abulzahab
Keyword(s):  
Input Power ◽  
Point Of View ◽  
Assessment Procedure ◽  
Generation System ◽  
Pv System ◽  
Remote Areas ◽  
Pv Systems ◽  
Series Configuration ◽  
Power Generation System ◽  
Efficiency And Reliability

The prevalence rate of photovoltaics (PV)-based generation systems has increased by more than 15 folds in the last decade, putting it on the top compared to any other power generation system from the expandability point of view. A portion of this huge expansion serves to energize standalone remote areas. Seeking improvements from different aspects of PV systems has been the focus of many studies. In the track of these improvements, parallel MPPT configuration for PV standalone systems have been introduced in the literature as an alternative to a series configuration to improve the overall efficiency of standalone PV systems. However, this efficiency improvement of the parallel MPPT configuration over the series one is not valid for any standalone application, therefore an assessment procedure is required to determine the most efficient MPPT configuration for different standalone applications. Therefore, in this study, an assessment procedure of parallel MPPT is conducted to demonstrate the suitability of utilizing such a configuration compared to series one, based on load daytime energy contributions. This assessment will help PV system designers to determine which MPPT configuration should be selected for applications under study. Furthermore, a new utilization of parallel MPPT configuration is introduced for operating universal input power supply (UIPS) loads to eliminate the inverter stage, thereby increasing the overall system efficiency and reliability. Finally, a systematic procedure to size the complete system is introduced and reinforced by a sizing example.

scholarly journals Techno-Economic Analysis of a Residential PV-Storage Model in a Distribution Network

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3062 ◽  
Author(s):  
Xiong ◽  
Nour
Keyword(s):  
Energy Storage ◽  
Distribution Networks ◽  
Point Of View ◽  
Local Data ◽  
Pv System ◽  
Battery System ◽  
Pv Systems ◽  
High Penetration ◽  
Harmonic Components ◽  
Pv Generation

The high penetration level of photovoltaic (PV) generation in distribution networks not only brings benefits like carbon savings, but also induces undesirable outcomes, like more harmonic components and voltage fluctuations. Driven by decreasing costs of energy storage, the focus of this paper is to investigate the feasibility of applying energy storage in the grid-connected PV system to mitigate its intermittency. Firstly, to appreciate the functionality of storage, a generic PV-battery-supercapacitor model was simulated in MATLAB/Simulink, and a flat load profile was obtained to enhance predictability from the network management point of view. However, the usage of supercapacitors at the residential level is limited, due to its high startup costs. Secondly, a detailed residential PV-battery model was implemented in the System Advisor Model (SAM) based on local data in Dubai. The optimal sizing of a battery system was determined by assessing two criteria: The number of excursions, and average target power, which are contradictory in optimization process. Statistical indicators show that a properly sized battery system can alleviate network fluctuations. The proposed sizing method can be also applied to other PV-storage systems. Finally, economic studies of PV-battery system demonstrated its competitiveness against standalone PV systems under appropriate tariff incentives.

scholarly journals Performance Analysis of a Modernized Z-Source Inverter for Robust Boost Control in Photovoltaic Power Conditioning Systems

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 139 ◽  
Author(s):  
Nafis Subhani ◽  
Ramani Kannan ◽  
Md Mahmud ◽  
Mohd Romlie
Keyword(s):  
Power Generation ◽  
Common Ground ◽  
Single Stage ◽  
Solar Irradiation ◽  
Generation System ◽  
Power Conditioning ◽  
Pv System ◽  
Voltage Stress ◽  
Power Generation System ◽  
Pv Power Generation

In this paper, the performance of a new Z-source inverter (ZSI)-based single-stage power conditioning system (PCS) is analyzed for a standalone photovoltaic (PV) power generation system. The proposed ZSI-based PCS includes two main parts: one is the input from PV units and the other is the ZSI. In this work, a new topology, termed the switched inductor-assisted strong boost ZSI (SL-SBZSI), is introduced for improving the performance of the PCS. The proposed topology shows high boosting capability during the voltage sag in PV units due to variations in solar irradiation and temperature. Another key advantage is the reduced capacitor voltage stress and semiconductor switch voltage stress of the inverter bridge, which ultimately minimizes the size and cost of the single-stage PCS. The proposed ZSI topology falls under the doubly grounded category of inverter by sharing the common ground between the input and output. This is an additional feature that can minimize the leakage current of PV units at the ac output end. The operational principles, detailed mathematical modeling, and characteristics of the proposed SL-SBZSI for a standalone photovoltaic (PV) power generation system is presented in this paper for analyzing performance. The simulation results, which are performed in MATLAB/Simulink, demonstrate the improved performance of the proposed SL-SBZSI for the standalone PV system. The performance of the proposed topology is also evaluated through an experimental validation on a laboratory-based PV system.

Performance Evaluation of Photovoltaic Power-Generation System Equipped With a Cooling Device Utilizing Siphonage

2005 ◽  
Vol 128 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Kaoru Furushima ◽  
Yutaka Nawata
Keyword(s):  
Power Generation ◽  
Cooling Water ◽  
Ground Level ◽  
Hot Water ◽  
Generation System ◽  
Cooling Device ◽  
Pv System ◽  
Pv Modules ◽  
Power Generation System ◽  
Hot Water Supply System

In order to construct an efficient photovoltaic (PV) power-generation system, we have developed a new system equipped with a cooling device utilizing siphonage. The major components of the system are an array of PV modules and cooling panels attached to the backside of the PV modules. The PV modules are cooled with cooling water flowing through a narrow gap in each cooling panel, and hot water discharged from the cooling panel can be reused. In order to save energy for introducing cooling water into the panel, siphonage from an upper level of a building to the ground level is utilized. From long-term monitoring tests in summer for the PV system, we confirmed that the cooling of the PV modules increases the electric power and that the reuse of hot water from the cooling panel contributes very much for saving energy consumed in a hot-water-supply system.

scholarly journals Design and performance analysis of PV grid-tied system with energy storage system

2021 ◽  
Vol 11 (2) ◽  
pp. 1077
Author(s):  
Jerry Kumar ◽  
Nanik Ram Parhyar ◽  
Manoj Kumar Panjwani ◽  
Danish Khan
Keyword(s):  
Power Generation ◽  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Generation System ◽  
Pv System ◽  
Power Generation System ◽  
New Challenges ◽  
The Stability ◽  
Pv Grid

With the increasing demand for solar energy as a renewable source has brought up new challenges in the field of energy. However, one of the main advantages of photovoltaic (PV) power generation technology is that it can be directly connected to the grid power generation system and meet the demand of increasing energy consumption. Large-scale PV grid-connected power generation system put forward new challenges on the stability and control of the power grid and the grid-tied photovoltaic system with an energy storage system. To overcome these problems, the PV grid-tied system consisted of 8 kW PV array with energy storage system is designed, and in this system, the battery components can be coupled with the power grid by AC or DC mode. In addition, the feasibility and flexibility of the maximum power point tracking (MPPT) charge controller are verified through the dynamic model built in the residential solar PV system. Through the feasibility verification of the model control mode and the strategy control, the grid-connected PV system combined with reserve battery storage can effectively improve the stability of the system and reduce the cost of power generation. To analyze the performance of the grid-tied system, some real-time simulations are performed with the help of the system advisor model (SAM) that ensures the satisfactory working of the designed PV grid-tied System.

Simulation of a Mechatronic Dual-Axis Tracking System for PV Panels

2016 ◽  
Vol 859 ◽  
pp. 81-87
Author(s):  
Cătălin Alexandru
Keyword(s):  
Dynamic Simulation ◽  
Tracking System ◽  
Virtual Prototyping ◽  
Point Of View ◽  
Energetic Efficiency ◽  
Mechanical Device ◽  
Pv System ◽  
Pv Systems ◽  
Pv Panel ◽  
Main Components

The paper shows the dynamic simulation in virtual environment of a dual-axis sun tracking mechanism with application in photovoltaic (PV) systems, with the aim to increase the energetic efficiency. The idea is to design a tracking mechanism that automatically changes the diurnal and elevation (altitudinal) position of the PV panel, by considering a predefined tracking algorithm, for maximizing the degree of use of the solar energy (i.e. the incident solar radiation). The tracking mechanism is approached in mechatronic concept, by through the implementation of the two main components (mechanical device, and actuating & control system) at the virtual prototype level. The dynamic simulation was performed by using a virtual prototyping platform, which includes the following software solutions: CATIA, ADAMS/View & ADAMS/Controls, and EASY5. The behavior (performance) of the tracking mechanism is evaluated from energetic efficiency point of view, considering the energy gain reported to an equivalent fixed PV system.

Simulation About Suitable Direction of Photovoltaic Array for Residential Solar Power Generation System

Solar Energy ◽  
2003 ◽  
Author(s):  
Koji Sakai ◽  
Osamu Ishihara ◽  
Akio Tanaka ◽  
Hidetoshi Nakagami ◽  
Masaki Manabe
Keyword(s):  
Power Generation ◽  
Tilt Angle ◽  
Generation System ◽  
Pv Systems ◽  
Photovoltaic Array ◽  
Solar Power Generation ◽  
Installation Angle ◽  
Power Generation System ◽  
Pv Power Generation ◽  
Fixed System

In this paper, it is attempted in the present study to estimate the factors to reduce power generating efficiency using the results of measurements and to calculate the optimal tilt angle in Kyushu area. Also, the study was made as to how the annual power generation amount is influenced by the deviation of the optimal tilt angle from actual installation angle. We have obtained the results that modeling was performed on the factors to reduce the efficiency obtained from measurements, and PV power generation amount in Kyushu area was estimated. Also, from the results of calculation of the optimal installation angle of the fixed system at installation site, it was demonstrated that the installation of PV systems on roof surface as generally practiced at present did not lead to a greater loss.

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