1. (1) T. Shindo and T. Hayashi: “Current Status and Preventing Methods of Voltage Sag”, IEEJ Trans. PE, Vol. 123, No. 6, pp. 679-682 (2003-6) (in Japanese)
2. (2) Electric Technology Research Association: “Voltage sag mitigation methods”, Electric Technology Research, Vol. 46, No. 3 (1990) (in Japanese)
3. (3) Y. Sekine, T. Yamamoto, S. Mori, N. Saito, and H. Kurokawa: “Present state of momentary voltage dip interferences and the countermeasures in Japan”, CIGRE 1992, paper 36-206 (1992)
4. (4) T. Iwasaki and K. Sano: “Recent Voltage Dip’sProblem and its Countertmeasures”, Nissin Electric Rev., Vol. 41, No. 3, pp. 35-43(1996) (in Japanese)
5. (5) A. Arora, K. Chan, T. Jauch, A. Kara, and E. Wirth: “Innovative system solutions for power quality enhancement”, ABB Rev., 3/98, pp. 4-12 (1998)