Abstract
Many problems with PV-plants are caused by the inverters and their
different technical methods to deal with environmental conditions.
Unsuitable behaviour can cause dangers for the environment or the
inverters itself. The recent situation is that a lot of environmental
situations which can occur with a relative high probability are not
defined normative. Environmental conditions in the case of different
short-circuits in the grid and induced values in the case of lightning-surge
impacts were examined. Further special test-series at inverters of
different technologies and for different applications (stand-alone
and grid-connected) were performed at the special test-stand in Vienna
with the ability of generator and net-simulation and the high-voltage
and high-current test-laboratory to simulate environmental conditions
with extreme parameters. The aim of the tests was to develop suitable
measurements against disturbances and dangers (risks) and to get
a base for new test-parameters for PV inverters
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