A new wind generation system cooperatively controlled with hydrogen electrolyzer

This paper presents a cooperative control method of the wind generation system composed of multiple wind generators and hydrogen generator. In this system, some part of the output power from the wind generators is consumed by hydrogen generator, and the other part, which is smoothed by the cooperative control between the wind generators and the hydrogen generator, is supplied to the grid. In this system, Doubly-Fed Induction Generator (DFIG) is adopted as a wind generator, which can be operated at adjustable speed. Each electrolyzer in the hydrogen generator is operated only at the rated power consumption mode (“ON condition”) or at zero power consumption mode (“OFF condition”), because fractional power operation can have a bad influence on the service life of electrolyzers. Therefore, since the hydrogen generator cannot smooth the fluctuating power from the wind generators completely, the smoothing control is performed by controlling the kinetic energy of DFSGs in this system. As a result, in the proposed system, smoothed power can be supplied to the grid system without using any energy storage device as well as hydrogen can be produced.