Abstract
Power loss due to partial shade was compared for two types of commercial photovoltaic modules. We also tested both types of modules with bypass diodes removed to simulate diode failure. Modules with uniformly low reverse bias voltage (VBR) cells (of -4V) lost significantly less power compared to modules with high VBR cells (of -15V) when subjected to partial shade. Differences in power loss were even larger when bypass diodes were removed. Associated with higher power loss, we observed several types of degradation on modules with high-VBR cells. A model to simulate power loss in an array due to partial shading that uses VBR as the main parameter was found to be in good agreement with measured power losses in the field.
Original language | English (US) |
---|---|
Title of host publication | 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Print) | 9781479979448 |
DOIs | |
State | Published - Dec 14 2015 |
Event | 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: Jun 14 2015 → Jun 19 2015 |
Other
Other | 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 |
---|---|
Country | United States |
City | New Orleans |
Period | 6/14/15 → 6/19/15 |
Keywords
- bypass diodes
- crystalline materials
- current-voltage characteristics
- degradation
- photovoltaic systems
- power system protection
- reverse bias voltage
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials