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Islanding Protection of Microconverters for Photovoltaics
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| Author(s) |
Woyte A., Belmans R., Nijs J.* |
| Abstract |
A major safety issue about grid-connected photovoltaics is to avoid non-intentional operation in islanding mode with the stiff distribution grid being tripped. This paper presents detailed measurements on the islanding behaviour of four module inverters with maximum 200 W rated power. Although applying active anti-islanding measures, each inverter could be forced into islanding operation. It could be observed experimentally what recently has been shown analytically, that the so-called active frequency drift method against islanding fails if inverters are loaded with considerable parallel capacitance. As most distribution grids contain a considerable capacitance, improved methods are to be developed. One of the tested inverters failed totally what illustrates the need for standardised type approvals. In general, the outcomes contribute to identify several drawbacks in state-of-the-art technology to be discussed with the manufacturers. |
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| Filename: | EPE-PEMC2000 - 122 - Woyte.pdf |
| Filesize: | 318.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-28 by System |
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