FEATURES OF ELECTRO-THERMAL PROTECTION OF SOLAR MODULES BASED ON BYPASS CRITI-CAL THERMORESISTORS
The results of experimental research on the influence of the features of the electrical circuit parameters of the solar module on the functioning of its passive photocell with a parallel-connected bypass critical thermistor as a method of increasing the solar module reliability of are presented. Gla...
Збережено в:
| Дата: | 2024 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
Institute of Renewable Energy National Academy of Sciences of Ukraine
2024
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| Теми: | |
| Онлайн доступ: | https://ve.org.ua/index.php/journal/article/view/440 |
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| Назва журналу: | Vidnovluvana energetika |
Репозитарії
Vidnovluvana energetika| Резюме: | The results of experimental research on the influence of the features of the electrical circuit parameters of the solar module on the functioning of its passive photocell with a parallel-connected bypass critical thermistor as a method of increasing the solar module reliability of are presented. Glass-ceramic materials based on vanadium dioxide and vanadium-phosphate glass V2O5-P2O5 were used as thermistor, which change the electrical resistance in leaps and bounds by 1.5-2 orders of magnitude in the temperature range of 70 0С. The main attention is paid to the study of the patterns of behavior of the functional electrical and thermal characteristics of such elements depending on the amplitude of overvoltage and load resistance.
It was found that as the amplitude of the overvoltage on the passive (shaded or damaged) photocell increases, the duration of the process of switching the bypass thermistor to the highly conductive state decreases, the voltage drop after switching decreases sharply (to values not exceeding 2 V) and changes weakly. An increase in the load resistance leads to a decrease in the current through the thermistor and an increase in the duration of the transient process. With thermal contact between the passive photocell and the bypass thermistor, switching is observed at lower overvoltages. In the absence of such a contact, the temperature to which the photocell is heated changes insignificantly in a steady state. |
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