Improved MPPT algorithm with reduced influence of partial shading on photovoltaic system
A technology of partial shading, photovoltaic system, applied in photovoltaic power generation, control/regulation systems, instruments, etc., can solve the problems of many state variables, expensive application, control disturbance of post-stage converters, etc., to achieve low environmental impact and work effect. Good, small effect of mistracking
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[0039] 1 Output characteristics of single string array under partial shadow
[0040] 1.1 Mathematical model of single string array under partial shadow
[0041] In order to analyze the output characteristics of the single-string array, it is first necessary to establish a mathematical model of the single-string array accurately. In practical applications, photovoltaic cell manufacturers will provide users with the open circuit voltage V of the product under standard test conditions oc , short-circuit current I sc , maximum power point voltage V m and maximum power point current I m . Considering the convenience of analysis and calculation, the connection between standard parameters and output characteristics can be established, so this paper chooses the solar cell engineering mathematical model:
[0042] I=I sc -C 1 I sc [exp(V / C 2 V oc )-1] (1)
[0043] I: photovoltaic cell output current;
[0044] I sc : PV cell short-circuit current;
[0045] C 1 : Parametric...
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