Power Quality Measurement after Changes of the German Renewable Energy Feed-In Law (EEG) from the View of an International acting Measurement Institution

摘要

In the new German feed-in law for renewables from 2009 /4/ the system stability is considered substantial. The main focus is that especially the wind turbine generators work more and more like big power stations. The requirements of the German Transmission Code from 2007 for high volt connections /6/ and for the medium voltage connection (BDEW Richtlinie) from 2008 /5/ are legitimated by the law and are precised in some topics by in the extension of the EEG the SDLWindV from summer 2009. If wind turbines fulfill all requirements, the fee will increase. Turbines connected after June of 2010 have to fulfill all requiremenst in any case. But how to ensure the availability of the new requirements? For that the handling of power quality measurement has changed. The technical guideline TR3 /1/ of the power quality measurement of the Fordergesellschaft Windenergie e.V. (FGW, fund association wind energy) is now implementated in the new 21st revision. This TR3 is related mainly to the IEC 61400-21 ed. 2 /2/ but has some significant extensions. Additional two new technical guidelines, the TR4 for modeling and the TR8 for certification, are introduced and are now in the revision 5 and revision 3. Out of the fact that these guidelines are still under development further changes are expected to the end of 2010. Out of the changes of the IEC 61400-21 from edition 1 to edition 2 the MEASNET procedure was adduced as well /3/. MEASNET is a cluster of international measurement institutions in Europe and USA for to harmonizes measurements procedures.