Hydrogen energy storage technology is considered as an effective and promising solution to abandoning power due to intermittency and uncontrollability of renewable energy resources. In this paper, a theoretical model of direct coupling system of photovoltaic and proton exchange membrane (PEM) water electrolyzer (WE) was established to optimize the operating conditions. Results showed that the changeable weather can cause the deviation between system operating points and the PV maximum power points which decreased the solar energy utilization efficiency. Based on the model, two optimization methods were proposed, “roughly adjust” can be done by matching the combination of PV modules and number of water electrolyzer cells, and then “precise adjust” by changing the operating temperature of water electrolyzer to obtain minimum energy loss. This work can be used as operation strategy for PV-PEM water electrolyzer direct coupling systems.
GUO Chang-qing
,
YI Li-qi
,
YAN Chang-feng
,
SHI Yan
,
WANG Zhi-da
. Optimization of Photovoltaic-PEM Electrolyzer Direct Coupling Systems[J]. Advances in New and Renewable Energy, 2019
, 7(3)
: 287
-294
.
DOI: 10.3969/j.issn.2095-560X.2019.03.012
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