engleski

An investigation into the effect of photovoltaic module electric properties on maximum power point trajectory with the aim of its alignment with electrolyzer U-I characteristic

In or der to com bine a pho to vol taic mod ule and an electrolyzer to pro duce hy dro gen from wa ter, an in ter me di ate DC/DC con verter can be used to adapt out put power fea tures of the mod ule to in put power fea tures of the electrolyzer. This can also be done with out us ing elec tron ics, which re sults in sav ing as much as 700 USD/kW, as pre vi ous in ves ti ga tion has shown. A more so phis ti cated in ves ti ga tion should be car ried out with the aim of im prov ing high sys tem ef fi ciency, re sult ing in match ing the pho to vol taic mod ule max i mum power point tra jec tory (the max i mum power point path in the U- I plane as a re sult of so lar irradiance change) to the op er at ing char ac ter is tic of the electrolyzer. This pa per pres ents an anal y sis of the in flu ences of pho to vol taic mod ule elec tric prop er ties, such as se ries and par al lel re sis tance and non-ideality fac tor, on the max i mum power point tra jec tory at dif fer ent lev els of so lar irradiance. The pos si bil ity of var i ous in cli na tions (right – ver ti cal – left) in re la tion to an ar bi trary cho sen op er at ing char ac ter is tic of the electrolyzer is also dem on strated. Sim u lated re sults are ob tained by us ing Matlab/Simulink sim u la - tions of the well known one-di ode model. Sim u la tions have been con firmed with ex - per i ments on a real pho to vol taic mod ule where so lar irradiance, so lar cell tem per - a ture, elec tric cur rent, and volt age in the cir cuit with vari able ohmic re sis tance have been mea sured.

photovoltaic module; series resistance; parallel resistance; operating (U-I) characteristic; maximum power point; electrolyzer

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