1. (1) D. Iioka, K. Sakakibara, Y. Yokomizu, T. Matsumura, and N. Izuhara: “Distribution Voltage Rise at Dense Photovoltaic Power Generation Area and its suppression by SVC”, IEEJ Trans. PE, Vol. 126, No. 2, pp. 153-158 (2006) (in Japanese)
2. (2) “High Penetration of PV in Local Distribution Grids”, IEA PVPS Task14-2 Report (2014)
3. (3) dena: dena Ancillary Services Study 2030. Security and Reliability of a Power Supply with a High Percentage of Renewable Energy, Final Report (2014)
4. (4) K. Ishikawa, H. Taniguchi, H. Suzuki, Y. Ota, and Y. Mizuno: “Fundamental Voltage Characteristics in Power System with Large Penetration of Photovoltaic Generation”, IEEJ Trans. PE, Vol. 134, No. 1, pp. 2-8 (2014) (in Japanese)
5. (5) K. Ishikawa, H. Taniguchi, H. Suzuki, Y. Ota, and Y. Mizuno: “Fundamental Study on Voltage Stability in Power System with Large Penetration of Photovoltaic Generation Considering Induction Motor Dynamics”, IEEJ Trans. PE, Vol. 134, No. 7, pp. 568-578 (2014) (in Japanese)