Abstract
Many tracking PV systems avoid row-to-row shading by backtracking in morning and afternoon. Because the common single-axis backtracking implementation assumes the array is in a horizontal plane, it does not fully prevent row-to-row shading in arrays installed on cross-axis slopes. This paper simulates the effect of reduced self-shading on annual production with two modified backtracking strategies. Depending on the array geometry and the steepness of the cross-axis grade, using a modified backtracking strategy improved annual yield by 3-10%.
Original language | American English |
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Number of pages | 9 |
State | Published - 2020 |
Event | 47th IEEE Photovoltaic Specialists Conference (PVSC 47) - Duration: 15 Jun 2020 → 21 Aug 2020 |
Conference
Conference | 47th IEEE Photovoltaic Specialists Conference (PVSC 47) |
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Period | 15/06/20 → 21/08/20 |
Bibliographical note
See NREL/CP-5K00-79278 for paper as published in proceedingsNREL Publication Number
- NREL/CP-5K00-76023
Keywords
- backtracking
- grade
- photovoltaic
- shading
- single-axis tracking
- slope
- yield