Masatoshi Sugimasa

Output Power Smoothing and Hydrogen Production by Using Variable Speed Wind Generators

This paper presents a combination system of wind energy conversion and hydrogen production. Hydrogen is expected as an alternative energy source in the future, and this is the best way to produce it from renewable energy like wind energy. On the other hand, the output of a wind generator, in general, fluctuates greatly due to wind speed variations, and thus the output fluctuations can have a serious influence on the power system operation. In the proposed system, a variable speed wind generator is adopted, and an electrolyzer is installed in parallel with it for hydrogen production. Output power from the wind generator is smoothed and supplied to the power system as well as to the electrolyzer based on the cooperative control method. The performance of the proposed system is evaluated by simulation analyses, in which simulations are performed by using PSCAD/EMTDC.

A cooperative control method for output power smoothing and hydrogen production by using variable speed wind generator

This paper presents a combination system of wind energy conversion and hydrogen production. Hydrogen is expected as alternative energy sources in the future, and it is the best way to produce it from renewable energy like wind energy. On the other hand, the output of a wind generator, in general, fluctuates greatly due to wind speed variations, and thus the output fluctuations can have a..serious influence on the power system. In the proposed system, a variable speed wind generator is adopted, and an electrolyzer is installed in parallel with it for hydrogen production. Output power from the wind generator is smoothed and supplied to the power system as well as to the electrolyzer based on the cooperative control method. The performance of the proposed system is evaluated by simulation analyses, in which simulations are performed by using PSCAD/EMTDC.

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 genera1tors 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.