1. (1) T. Masuta, Y. Gunjikake, A. Yokoyama, and Y. Tada : “Statistical Modeling of Controllable Heat Pump Water Heaters Considering Customers’ Convinience and Uncertainty and its Application to Frequency Control in Power System with a Large Penetration of Renewable Energy Sources”, IEEJ Trans., Vol. 131, No. 1, pp. 9-19 (2011-1) (in Japanese)
2. (2) Y. Gunjikake, T. Masuta, A. Yokoyama, and Y. Tada : “An Effective Operation Method of Controllable Heat Pump Water Heaters for Frequency Control in a Power System with a Large Penetration of Renewable Energy Sources”, Proc. of 2010 Annual Conference of Power & Energy Society, IEE Japan, pp. 02-35-41 (2010-9) (in Japanese)
3. (3) M. Asari and H. Kobayashi : “Development of Control Method for Reverse Power Flow of Photovoltaic Generation System - Annual Simulation and Demonstration Test”, Proc. of 2010 Annual Conference of Power & Energy Society, IEE Japan, pp. 09-7-8 (2010-9) (in Japanese)