scholarly journals Space weather effects on the MAGION-4 and MAGION-5 solar cells

2005 ◽  
Vol 23 (9) ◽  
pp. 3111-3113 ◽  
Author(s):  
P. Tříska ◽  
A. Czapek ◽  
J. Chum ◽  
F. Hruška ◽  
J. Šimůnek ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Activity ◽  
Output Power ◽  
Space Weather ◽  
Radiation Belts ◽  
High Solar Activity ◽  
Solar Array ◽  
Weather Effects ◽  
Array Output ◽  
Array Efficiency

Abstract. Data on solar array efficiency measured on board two Czech MAGION micro-satellites between August 1995 and June 2002, during the period of increasing and high solar activity, were used to study the space weather effects on photo-voltaic solar cells. A stronger degradation of the solar array was observed on MAGION-5 in comparison with MAGION-4. This fact can be explained by the essential difference between the two orbits. The MAGION-5 s/c was in the radiation belts more than 40% of the time, whereas the MAGION-4 was only present about 4% of the time. The experimental data refer to periods of low as well as high solar activity, with an enhanced occurrence of strong solar events. The evaluation of the data set covering a period of more than 6 years has shown that solar proton flares can have an almost immediate effect on the solar array efficiency. However, in the case of MAGION-5, an important role in solar cell degradation is played by the long-term effect of energetic particles in the radiation belts. Periods with a distinctly steeper decrease in the solar array output power were observed and can be explained by an increase of particle flux density in the radiation belts. Periods in slower decline of the solar array output power correspond to periods in low radiation belt indices based on the NOAA POES s/c data.

Space Weather Effects in the Earth’s Radiation Belts

2017 ◽  
pp. 371-430
Author(s):  
D. N. Baker ◽  
P. J. Erickson ◽  
J. F. Fennell ◽  
J. C. Foster ◽  
A. N. Jaynes ◽  
...  
Keyword(s):  
Space Weather ◽  
Radiation Belts ◽  
Weather Effects ◽  
Earth's Radiation Belts

scholarly journals Transmission Lines in Poland and Space Weather Effects

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2359 ◽  
Author(s):  
Agnieszka Gil ◽  
Renata Modzelewska ◽  
Szczepan Moskwa ◽  
Agnieszka Siluszyk ◽  
Marek Siluszyk ◽  
...  
Keyword(s):  
Solar Activity ◽  
Geomagnetic Activity ◽  
Space Weather ◽  
Transmission Lines ◽  
Cumulative Effect ◽  
Activity Cycle ◽  
Activity Level ◽  
Geomagnetic Disturbances ◽  
Time Intervals ◽  
Weather Effects

We analyze the solar influence of space weather events on Polish energy infrastructure via geomagnetic disturbances. We consider two time intervals of very different levels of solar activity (SA) in the course of the solar activity cycle 24: 2010—an early rising phase of SA, near the solar minimum and 2014—solar maximum. From the total number of electrical grid failures, we extract almost five thousand failures in 2010 and more than ten thousand in 2014, which could be related to space weather effects. We analyze data of failures having unidentified causes, failures coupled with the aging of transmission network elements and electronic devices, which appeared during the time intervals of enhanced geomagnetic activity. We show that around the times of increasing geomagnetic activity level, the amount of transmission lines failures in the groups mentioned above grows, but mostly with some delay. It might be connected to some cumulative effect due to the result of transient states and their propagation in the distribution network. Although we do not exclude that the other factors may play a role, the solar-originating disturbances strengthen these effects.

The Analysis of Abnormal Phenomena of GEO Satellites Solar Array

2013 ◽  
Vol 823 ◽  
pp. 559-562
Author(s):  
Jiao Yan Zhang ◽  
Jun Yan Wang ◽  
Wei He ◽  
Hong Lan Bu ◽  
Yan Zhang
Keyword(s):  
Solar Energy ◽  
Output Power ◽  
Electrical Energy ◽  
Solar Array ◽  
Real Output ◽  
The Real ◽  
Geo Satellites ◽  
Working Status ◽  
Normal Trend ◽  
Array Output

Satellites solar array provides sustainable and reliable energy for satellite by changing the solar energy into electrical energy in order to ensure the normal working of the satellite. The working status of solar array is directly related to the satellites normal running in orbit. The thesis summarized the normal trend of the GEO satellites solar array output power, through comparing the real output power of a certain satellites solar array with the normal trend, and detected four abnormal phenomena of solar array output power. Then the thesis analyzed the reasons, and made related suggestions.

scholarly journals Space Weather Effects in the Earth’s Radiation Belts

2017 ◽  
Vol 214 (1) ◽  
Author(s):  
D. N. Baker ◽  
P. J. Erickson ◽  
J. F. Fennell ◽  
J. C. Foster ◽  
A. N. Jaynes ◽  
...  
Keyword(s):  
Space Weather ◽  
Radiation Belts ◽  
Weather Effects ◽  
Earth's Radiation Belts

scholarly journals Concentrating System’s Design and Performance Analysis for Spacial Solar Array

2018 ◽  
Vol 36 (3) ◽  
pp. 471-479
Author(s):  
Limin Shao ◽  
Shuli Yang
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Output Power ◽  
Open Circuit Voltage ◽  
Operating Temperature ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Solar Array ◽  
Maximum Output

A large area of sunlight onto solar cells is gathered by concentrating system for spacial concentrating solar array, which reduces the amount of solar cells by increasing light intensity onto the solar cells of the unit area. Under concentrating conditions, the short-circuit current, open-circuit voltage, fill factor, efficiency, operating temperature and strong thermal-electrical coupling characteristics of concentrating solar cells are different from the conventional solar cells because of the high intensity and high operating temperature. The concentrating module design, solar cell selection, and design of solar cell heat-dissipation have been carried out. The thermal-electric coupling model of special concentrating photovoltaic system has been established. The relationships among concentrated ratio, substrate-thickness, thermal conductivity of substrate-material and solar cell’s temperature, density of short-circuit current, open-circuit voltage, maximum output power have been analyzed, which provide a view to a reasonabl0e match and selection of multi-parameters in engineering design. Results show that the concentrated ratio has an overall effect on the open-circuit voltage, short-circuit current, efficiency and operating temperature of the solar cell. There is a strong coupling relationship among the parameters, and the positive and negative impacts caused by the concentrating characteristics should be weighed in the engineering design. The short-circuit current density of concentrating solar cells is proportional to the concentrated ratio. Under the lower concentrated ratio circumstance, fill factor and efficiency is not substantially affected by the concentrated ratio. The maximum output power and open-circuit voltage increase with the increase of concentrated ratio. Temperature of concentrating solar cells has an adverse effect on the open-circuit voltage, efficiency and output power, which needs high efficient radiator measures to be taken. The operating temperature of solar cells could be decreased significantly by the high thermal conductivity of the substrate-material. The concentrated ratio between 9~15 is recommended for spacial solar array, which not only embodies the advantage of concentrator like improving the cell-efficiency and decreasing the cost, but also doesn’t exact the deploying precision of concentrating system.

scholarly journals Designing an Intelligent Maximum Power Point Tracking (MPPT) for a Rooftop Solar Array

2021 ◽  
Vol 7 (05) ◽  
pp. 133-138
Author(s):  
Afshin Balal & Shahab Balali
Keyword(s):  
Solar Cells ◽  
Output Power ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Operating Point ◽  
Solar Array ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Power Point

By considering the limitation of the size of houses, the permanent inaccessibility of the solar radiation energy, and also the low efficiency of solar cells, a PV system requires the maximum power point tracking(MPPT). The main issue with using solar cells is to reach its maximum power, which is intensified by change in the temperature and radiation. In this paper, among MPPT methods, the Perturb and Observe (P&O) method, has been designed which has high reliability and traceability. However, due to the output power oscillation around the operating point in P&O method, an optimization fuzzy/bee algorithm is used for maximum power point tracking so that without the need for temperature and light sensors, reduction of output power oscillations can be achieved. Simulation results indicate that by using the fuzzy/ bee method, in addition to reducing the fluctuation around the operating point, the speed of reaching to the optimal point is maximized.

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