Experimental verification of suppressing power fluctuation in photovoltaic generation system using water electrolyzer

Abstract

This paper develops an emulator simulating the power smoothing control for the photovoltaic generation system with an energy storage system using a water electrolyzer and realizes experimental verification. In this system, the fluctuating components of the photovoltaic generation power are converted to hydrogen and stored. The availability of this system is evaluated by means of the suppression effect of the power fluctuating components in the load frequency control region and the amount of produced hydrogen for a day. In the emulator with the rated power of 200 W for the photovoltaic generation system, the amount of produced hydrogen was 2.11 mol. This result corresponds to 8.22×103 mol for the photovoltaic system whose rated power is 800 kW. Furthermore, the fluctuating components in the load frequency control region were reduced by 47.3%.