A SIMPLE NON-LINEAR MODEL FOR THE EFFECT OF PARTIAL SHADE ON PV SYSTEMS

被引：13

作者：

Thakkar, Niket ^{[1
]}

Cormode, Daniel ^{[1
]}

Lonij, Vincent P. A. ^{[1
]}

Pulver, Steve ^{[1
]}

Cronin, Alexander D. ^{[1
]}

机构：

[1] Univ Arizona, Tucson, AZ 85721 USA

来源：

35TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE | 2010年

关键词：

COMPUTER-SIMULATION; PHOTOVOLTAIC ARRAYS; FIELD; ROWS;

D O I：

10.1109/PVSC.2010.5614450

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The effect of shade from one PV module on another is incorporated into a model for the power generated by PV systems. The model is calibrated with data from the Tucson Electric Power solar test yard. Shade de-rating factors from the model are compared with data every minute of the day and every day of the year. The model is then used to predict final yields (kWh/kW(DC)) for different PV system deployments with various (non-tracking) module orientations and ground-cover ratios. Several heuristics are put forth to help understand how the observed non-linear response to shade can impact the yield from PV systems. In one example, we find that a PV system deployed in the Tucson Electric Power solar test yard could produce 22% more kWh for the month of December (and 3.8% more annually) if the modules were separated by twice as much distance. In another example, we predict that a system in Tucson with south-facing modules at 12-degrees from horizontal can generate 1.5 times as many kWh/yr per square-meter of land compared to a system with modules at 32-degrees (the latitude angle). These examples emphasize the non-linear impact of partial shade on PV system performance.

引用

页码：2321 / 2326

页数：6

共 21 条

[1] Computer simulation of shading effects in photovoltaic arrays [J].