1. (1) IEA: Medium-Term Renewable Energy Market Report 2016 International Energy Agency (2016)
2. (2) T. Dominguez, et al.: “Renewable energy supervision and real time production control in Spain”, Int. Conf. on Renewable Energies and Power Quality, OCREPQ'08, pp. 1-6 (2008)
3. (3) K. Tada, A. Umemura, R. Takahashi, J. Tamura, Y. Matsumura, D. Yamaguchi, H. Kudo, M. Niiyama, and Y. Taki: “Frequency Control of Power System with Renewable Power Sources by HVDC Interconnection Line Considering Energy Balancing”, IEEJ Trans. PE, Vol. 139, No. 3, pp. 163-169 (2019) (in Japanese)
4. (4) J. Tamura, S. Niino, A. Umemura, R. Takahashi, Y. Matsumura, T. Taguchi, and A. Yamada: “A Consideration on Virtual Synchronous Generator Control of Power System”, IEEJ Trans. PE, Vol. 139, No. 6, pp. 455-456 (2019) (in Japanese)
5. (5) J. Tamura and I. Takeda: “A Consideration on the Sustained Oscillation Theory for Analysis of Hunting of Synchronous Machines”, T. IEE Japan, Vol. 110-D, No. 12, pp. 1294-1295 (1990) (in Japanese)