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A new EMC DC line impedance stabilization network

: Kirchhof, J.; Zhang, Y.

Fulltext urn:nbn:de:0011-n-4107248 (267 KByte PDF)
MD5 Fingerprint: 0276c69270cf8ddcbea36c1bd8b5ded5
Created on: 1.9.2016

European Commission:
26th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC. Proceedings : 5th to 9th September 2011 at the CCH - Congress Centre and International Fair Hamburg in Germany
München: WIP-Renewable Energies, 2011
ISBN: 3-936338-27-2
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <26, 2011, Hamburg>
Conference Paper, Electronic Publication
Fraunhofer IWES ()

EMC emission measurements on photovoltaic inverters are carried out according to the generic standard IEC61000-6-3. Since edition 2.0 published in 2006, changes have been made in the test setup for conducted radiofrequency measurements. The DC-side of the inverter shall be connected with a CISPR AC-Line Impedance Stabilization Network (LISN). In the first edition, a 150 Ohm LISN according to IEC50022 has been prescribed. Many AC-LISN available on the EMC market include large earth capacities between the lines and PE. For many transformerless inverters, these large capacities in the range of several microfarads will lead to malfunctions or saturation effects in the EMC filters which will never occur if the inverter is connected to a photovoltaic generator whose earth capacity is orders of magnitude lower. Because of these facts, an EMC test according to the actual edition of EN 61000-6-3 on transformerless photovoltaic Inverters is not possible anymore. This disadvantage of the standardization has been discovered in 2007 by Fraunhofer IWES. The investigation results have been discussed with members of national and international standardization organizations. As an overcoming of this disadvantage, a new test setup and a special PV-LISN will be included in the next edition of CISPR11/IEC55011.