scholarly journals Characteristic Analysis of Photovoltaic On-Grid System In Tropical Region For Weather-Corrected Performance Ratio Calculation Method Implementation

2018 ◽  
Vol 67 ◽  
pp. 01025
Author(s):  
Erfan Syahputra ◽  
Rio Agustian Fajarin ◽  
Eko Adhi Setiawan
Keyword(s):  
Temperature Coefficient ◽  
Calculation Method ◽  
Tropical Climate ◽  
Photovoltaic System ◽  
Performance Ratio ◽  
Ratio Method ◽  
Photovoltaic Systems ◽  
Subtropical Climate ◽  
Operating Condition ◽  
Real Operating Condition

Indonesia has different weather factors than the subtropical climate that influences the performance indicators of photovoltaic systems. One of them is performance ratio that is affected by temperature factors. NREL proposes calculation method of Weather-Corrected Performance Ratio for correcting factors (temperature) in calculation performance ratio of photovoltaic systems. However, the implementation of this method in real operating condition of photovoltaic system especially in the tropics, has not received special attention. In addition, temperature coefficient of power photovoltaic (δ) in Standard Test Condition, is used in the calculation method may be different in real operating condition. This study was conducted to determine the effects of weather-corrected performance ratio method and to know characteristic of temperature coefficient of power photovoltaic (δ) as factors in of weather-corrected performance ratio method, in real operating condition especially in tropics. Through analysis photovoltaic system data from the data logger it is found that the range values of weather-corrected performance ratio are greater than conventional methods, with a maximum increase of 2.43%. Moreover it is found that because average temperature of tropical climate is higher than subtropical climate, it makes the percentage of power decrease to rise in temperature (δ) in tropical climate is higher than subtropical climate.

scholarly journals A SIMPLIFIED CALCULATION METHOD OF ELECTRIC LINEAR ACTUATORS FOR SINGLE-AXIS SUN TRACKER

2018 ◽  
Vol 127 (1D) ◽  
pp. 47
Author(s):  
Ngo Xuan Cuong ◽  
Vo Quang Nha ◽  
Nguyen Thi Hong
Keyword(s):  
Calculation Method ◽  
Selection Method ◽  
Photovoltaic System ◽  
Size Analysis ◽  
Linear Actuator ◽  
Photovoltaic Systems ◽  
Linear Actuators ◽  
Power And Energy ◽  
Simplified Calculation ◽  
Simplified Calculation Method

<p>At present, the use of small roof-mounted photovoltaic systems is developing strongly, so development of a sun tracker to increase the efficiency of the photovoltaic system is essential. In this paper we have given the size analysis of linear actuator and also its selection method for single-axis tracker. In addition, the paper also given analysis of the power and energy of the linear actuator and its controller on a typical sunny day.</p>

The Effect of Concentrated Light Intensity on Temperature Coefficient of the InGaP/InGaAs/Ge Triple-Junction Solar Cell

2015 ◽  
Vol 8 (1) ◽  
pp. 106-111 ◽  
Author(s):  
Zilong Wang ◽  
Hua Zhang ◽  
Wei Zhao ◽  
Zhigang Zhou ◽  
Mengxun Chen
Keyword(s):  
Solar Cell ◽  
Light Intensity ◽  
Temperature Dependence ◽  
Temperature Coefficient ◽  
Triple Junction ◽  
Concentration Ratio ◽  
Crystalline Silicon ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Junction Solar Cell

Research on automatic tracking solar concentrator photovoltaic systems has gained increasing attention in developing the solar PV technology. A paraboloidal concentrator with secondary optic is developed for a three-junction GaInP/GalnAs/Ge solar cell. The concentration ratio of this system is 200 and the photovoltaic cell is cooled by the heat pipe. A detailed analysis on the temperature coefficient influence factors of triple-junction solar cell under different high concentrations (75X, 100X, 125X, 150X, 175X and 200X) has been conducted based on the dish-style concentration photovoltaic system. The results show that under high concentrated light intensity, the temperature coefficient of Voc of triple-junction solar cell is increasing as the concentration ratio increases, from -10.84 mV/°C @ 75X growth to -4.73mV/°C @ 200X. At low concentration, the temperature coefficient of Voc increases rapidly, and then increases slowly as the concentration ratio increases. The temperature dependence of η increased from -0.346%/°C @ 75X growth to - 0.103%/°C @ 200X and the temperature dependence of Pmm and FF increased from -0.125 W/°C, -0.35%/°C @ 75X growth to -0.048W/°C, -0.076%/°C @ 200X respectively. It indicated that the temperature coefficient of three-junction GaInP/GalnAs/Ge solar cell is better than that of crystalline silicon cell array under concentrating light intensity.

scholarly journals Energy Saving Strategies and On-Site Power Generation in a University Building from a Tropical Climate

2021 ◽  
Vol 11 (2) ◽  
pp. 542
Author(s):  
Jaqueline Litardo ◽  
Massimo Palme ◽  
Rubén Hidalgo-León ◽  
Fernando Amoroso ◽  
Guillermo Soriano
Keyword(s):  
Power Generation ◽  
Energy Consumption ◽  
Energy Saving ◽  
Building Energy ◽  
Tropical Climate ◽  
Power Converter ◽  
Photovoltaic System ◽  
Base Line ◽  
Building Energy Consumption ◽  
Cooling Loads

This paper compares the potential for building energy saving of various passive and active strategies and on-site power generation through a grid-connected solar photovoltaic system (SPVS). The case study is a student welfare unit from a university campus located in the tropical climate (Aw) of Guayaquil, Ecuador. The proposed approach aims to identify the most effective energy saving strategy for building retrofit in this climate. For this purpose, we modeled the base line of the building and proposed energy saving scenarios that were evaluated independently. All building simulations were done in OpenStudio-EnergyPlus, while the on-site power generation was carried out using the Homer PRO software. Results indicated that the incorporation of daylighting controls accounted for the highest energy savings of around 20% and 14% in total building energy consumption, and cooling loads, respectively. Also, this strategy provided a reduction of about 35% and 43% in total building energy consumption, and cooling loads, respectively, when combined with triple low-e coating glazing and active measures. On the other hand, the total annual electric energy delivered by the SPVS (output power converter) was 66,590 kWh, from where 48,497 kWh was supplied to the building while the remaining electricity was injected into the grid.

Modeling and characterization of a grid-connected photovoltaic system under tropical climate conditions

2018 ◽  
Vol 82 ◽  
pp. 2094-2105 ◽  
Author(s):  
Ali M. Humada ◽  
Ashty M. Aaref ◽  
Hussein M. Hamada ◽  
Mohd Herwan Sulaiman ◽  
Nowshad Amin ◽  
...  
Keyword(s):  
Tropical Climate ◽  
Photovoltaic System ◽  
Climate Conditions

Normalised efficiency of photovoltaic systems: Going beyond the performance ratio

Solar Energy ◽  
2017 ◽  
Vol 157 ◽  
pp. 408-418 ◽  
Author(s):  
Bert Herteleer ◽  
Bart Huyck ◽  
Francky Catthoor ◽  
Johan Driesen ◽  
Jan Cappelle
Keyword(s):  
Performance Ratio ◽  
Photovoltaic Systems

The Research of a Derivation Calculation Method for the Maximum Power Point in Grid-Connect Photovoltaic System

2012 ◽  
Vol 588-589 ◽  
pp. 583-586
Author(s):  
Yu Xin Wang ◽  
Feng Ge Zhang ◽  
Xiao Ju Yin ◽  
Shi Lu Zhu
Keyword(s):  
Calculation Method ◽  
Maximum Power Point Tracking ◽  
Direct Calculation ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Duty Ratio ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

A derivation calculation methods for the maximum power point tracking is proposed in this paper. This method is the direct calculation method for the maximum power point tracking, through the calculation of the derivative value of the power to voltage, adjust the change values of occupies emptiescompared, which is used to deduce the voltage and current value, judge whether the derivative of the power to the voltage is zero, if it is ture, the maximum power point is got. Hardware is used the method to regulate the duty ratio of PWM in DC/DC boost circuit ,though once sampling, it can calculate the value of voltage and the duty ratio at maximum power point. The prototype experiments using DSP2812 chip verify that the inverter can better realize the most power tracing, high accuracy, and the system has the high stability.

scholarly journals RESEARCH AND DESIGN OF GRID-CONNECTED INVERTER IN PHOTOVOLTAIC SYSTEM WITH SVPWM TECHNIQUE

2020 ◽  
Vol 6 (11) ◽  
pp. 18-31
Author(s):  
Nguyen Duc Minh ◽  
Bui Van Huy ◽  
Ngo Thi Quan ◽  
Nguyen Quang Ninh ◽  
Trinh Trong Chuong
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Experimental Results ◽  
Photovoltaic System ◽  
Photovoltaic Systems ◽  
Space Vector ◽  
Electrical Grid ◽  
Three Phase ◽  
Grid Connected Inverter ◽  
Research And Design

This paper presents the design and simulation of three phase grid-connected inverter for photovoltaic systems with power ratings up to 5 kW. In this research, the application of Space Vector Pulse Width Modulation (SVPWM) technique for inverter is explored. With the use of SVPWM inverter, synchronization between the inverter and electrical grid follows the Phaselocked Loop (PLL) algorithm. The proposed design is simulated and validated by experimental results.

scholarly journals FOTODIM—Software for Sizing of Photovoltaic Systems

2019 ◽  
Vol 11 (3) ◽  
pp. 137
Author(s):  
Daisy Regina dos Santos ◽  
Carlos Eduardo Camargo Nogueira ◽  
Felix Augusto Pazuch ◽  
Francielle Pareja Schneider ◽  
Jair Antonio Cruz Siqueira ◽  
...  
Keyword(s):  
Theoretical Basis ◽  
Net Present Value ◽  
Photovoltaic System ◽  
Photovoltaic Systems ◽  
Internal Rate Of Return ◽  
Computational Tool ◽  
Present Value ◽  
Grid Systems ◽  
Digital Book ◽  
Isolated Systems

This study addresses the development of a computational tool for the sizing of photovoltaic systems interconnected to the grid (grid-tied) and isolated (off-grid) systems. The calculations for the sizing were obtained from the CRESESB Engineering Manual for Photovoltaic Systems, the GREENPO Photovoltaic Systems Technology, Design and Installation Manual, and the BLUESOL Solar System Introduction Digital Book. With knowledge of the latitude, longitude and altitude data of the site, the tool calculates the angle of the modules for better absorption of the photovoltaic radiation. For systems connected to the grid, it is also necessary to provide information on the consumption of the building to be serviced by the photovoltaic system. For isolated systems, in addition to information on the site, it is necessary to know the demand and consumption of the building. Decision-making criteria are based on economic analysis, according to indexes such as Net Present Value (NPV), Internal Rate of Return (IRR), and Discounted Payback. The screens developed for the sizing tool and examples of sizing of both photovoltaic systems are presented as results, through tables and graphs. The developed software is reliable, and all calculations have theoretical basis.

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