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Design protection circuit for transformerless photovoltaic inverters in harsh climatic conditions

conference contribution
posted on 2013-01-01, 00:00 authored by M Alzoubi, Aman Maung Than OoAman Maung Than Oo, S Azad
Transformerless inverters technology in photovoltaic systems offers many advantages, but there are some safety issues due to the solar panel parasitic capacitance. The parasitic capacitance value depends on many factors such as PV panels and frame structure, surface of the cells, distance between the cells, module frame, weather conditions (e.g., humidity) and the amount of dust covering the PV panel. Harsh climate like the one in the Central Queensland region is characterized by high temperature, high relative humidity. Due to the region’s high dew point, high humidity and heavy rain during the wet season, the water condensed over the PV array surface will affect the stray capacitance significantly and consequently, the system leakage current. Human safety in PV system is a key issue, which must be addressed when this technology is applied. Protection against electrical shock is essential while deploying such systems to avoid injury or loss of life. Furthermore, PV insulation varies with meteorological conditions such as, temperatures, humidity. Therefore, the protective circuit should have the capability to adapt to any changes in metrological variables. This paper explorers the effect of meteorological changes on the insulation parameters and leakage capacitance and design a tools for protection.

History

Event

Power and Energy Systems. International Conference (6th : 2013 : Phuket, Thailand)

Pagination

42 - 48

Publisher

ACTA Press

Location

Phuket, Thailand

Place of publication

Calgary, Canada

Start date

2013-04-10

End date

2013-04-12

ISBN-13

9780889869592

ISBN-10

0889869596

Language

eng

Publication classification

E1.1 Full written paper - refereed

Editor/Contributor(s)

S Kaitwanidvilai

Title of proceedings

Asia PES 2013 : Proceedings of the IASTED Power and Energy Systems 2013 international conference

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