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Title:
 
Ground-Voltage-Control (GVC) for Transformerless Inverters in PV Power Plants Prevents TCO Corrosion and Polarisation Effects
 
Author(s):
 
F. Haase, U. Borup
 
Keywords:
 
PV System, System Performance, Inverter, TCO Corrosion, Polarisation Effect
 
Topic:
 
Components for PV Systems
Subtopic: Balance of System Components
Event: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain
Session: 4BV.1.20
 
Pages:
 
4438 - 4441
ISBN: 3-936338-26-4
Paper DOI: 10.4229/25thEUPVSEC2010-4BV.1.20
 
Price:
 
 
0,00 EUR
 
Document(s): paper
 

Abstract/Summary:


For many PV modules special grounding arrangements are required. For example, Thin-Film modules may suffer from TCO corrosion, which can destroy the entire PV plant. PV modules with backside contact cells may see a reduction in efficiency of approx. 30% due to polarisation effects. To prevent these serious issues, module manufacturers specify the grounding of the negative/positive side of the DC string. This can only be done with low efficiency, transformer based inverters and additional “Grounding-Kits”. GVC is a new patented technology for the high efficient transformer-less Danfoss TLX inverter series, allowing the usage for any kind of PV modules.