Utility-scale PV systems : grid connection requirements , test procedures and European harmonisation

Introduction Fa c i n g t h e e n o r m o u s g r o w t h o f decentralised generation connected to the distribution systems, the year 2009 brings fundamental changes for new PV systems in a number of European countries. While in the past, generators connected to the distribution system were commonly not permitted to take over an active role and had to “disconnect at the first sign of trouble”, the new guidelines now require the units to actively support the grid during normal as well as disturbed conditions. This step is being regarded more and more as absolutely necessary to guarantee reliability and quality of supply in the midto long-term.