STEP-DOWN MAXIMUM POWER POINT TRACKER FOR PHOTOVOLTAIC SYSTEMS

被引:70
作者
SALAMEH, ZM
DAGHER, F
LYNCH, WA
机构
[1] Department of Electrical Engineering, University of Lowell, Lowell
关键词
D O I
10.1016/0038-092X(91)90095-E
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
A design of a simple, inexpensive, and efficient maximum power point tracker (MPPT) is presented. This design calls for a fixed voltage and a pilot cell to track the maximum power point voltage (V(mp)). The tracking is done by changing the duty cycle of a step-down chopper, which is controlled by a direct feedback analog circuit. The control voltage of the tracker is the open circuit voltage (V(oc)) of the pilot cell multiplied by a constant. This constant is preadjusted so that it tracks the V(mp) of the array in response to any changes due to temperature or insolation. This MPPT can also function as a voltage regulator for battery charging.
引用
收藏
页码:279 / 282
页数:4
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