DC Power Optimizer for PV Modules Using SEPIC Converter

0 downloads 0 Views 270KB Size Report
The chopper duty cycle is continuously adjusted such that the PV module is forced to operate near the maximum power point that is determined from the online ...
2017 the 5th IEEE International Conference on Smart Energy Grid Engineering

DC Power Optimizer for PV Modules Using SEPIC Converter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

Abstract²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¶WH[FHHGWKHUHIHUHQFHYDOXHGHWHUPLQHG E\WKHZHDWKHUEDVHGPRGHO7KHDSSOLFDWLRQDUHDRIWKHSURSRVHG VFKHPH ZRXOG EH H[WHQGHG IURP D GF SRZHU RSWLPL]HU IRU DQ LQGLYLGXDO 39 WR LQFOXGH PLFURJULG DSSOLFDWLRQV ZKHUH FRPPHUFLDOO\ DYDLODEOH WHPSHUDWXUH DQG VRODU LUUDGLDQFH WUDQVGXFHUVFDQEHHPEHGGHGZLWKWKHGLVWULEXWHGFRQWUROXQLWRI WKH6(3,&FRQYHUWHUZLWKRXWGUDPDWLFLQFUHDVHWRWKHLQLWLDOFRVW RIWKHRYHUDOOV\VWHP  Keywords—photovoltaic; mppt; direct power control; energy yield model; sepic converter; dc power optimizer; mlpe.

,, 3932:(5)25(&$67,1*02'(/ 7KH LQVWDQWDQHRXV PD[LPXP '& SRZHU JHQHUDWHG IURP DQ LQGLYLGXDO39PRGXOHLVFRPSXWHGXVLQJHTXDWLRQV      ܲ ൌ ‫ܩ‬Ǥ ‫ܣ‬௉௏ Ǥ K௉௏ ሾͳ െ ߚሺܶ௉௏ െ ܶோாி ሻሿ ܶ௉௏ ൌ ܶ஺ ൅ ߙ‫ܩ‬

, ,1752'8&7,21





  

:KHUH  ,QVWDQWDQHRXVGFPD[LPXPSRZHURIWKH39PRGXOH : 

6RODULUUDGLDQFHLQFLGHQWRQWKH39VXUIDFH :P   6XUIDFHDUHDRIWKH39PRGXOH P  η2YHUDOOHIILFLHQF\RIWKH39PRGXOH ߚ7KHUPDOSRZHUFRHIILFLHQWRIWKH39PRGXOH /R&  6XUIDFHWHPSHUDWXUHRIWKH39PRGXOH R&   5HIHUHQFHWHPSHUDWXUHDW67& R&  ܶ஺ $PELHQW7HPSHUDWXUH R&  ߙ,UUDGLDQFHGHSHQGHQWFRHIILFLHQW R&P/: 

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

978-1-5386-1776-2/17/$31.00 ©2017 IEEE



  











$FFRUGLQJ WR (TQ   WKH PD[LPXP '& SRZHU RI WKH 39 PRGXOHLVFRPSXWHGEDVHGRQERWKPHWHRURORJLFDOLQIRUPDWLRQ WHPSHUDWXUH DQG LUUDGLDQFH  DQG LQIRUPDWLRQ DYDLODEOH IURP GDWDVKHHW PRGXOH HIILFLHQF\ VXUIDFH DUHD DQG WKHUPDO SRZHU