3Venkataramanan G, Johnson B K, Sundaram A. An AC--AC power converter for custom power applications[J]. IEEE Trans on Power Delivery, 1996, 11(3):1666-1671.
4Brooks J L. Solid state transformer concept development[R]. Naval material command, civil engineering laboratory, naval construction battalion ctr. Port Hueneme,CA, 1980.
5EPRI Report. Proof of the principle of the solid-state transformer the AC/AC switch mode regulator [R]EPRI TR-105067, Research Project 8001-13, Final Report,August 1995.
6Harada K, Anan F, Yamasaki K, et al. Intelligent transformer[C]. Conf Rec of IEEE PESC. [s. 1. ],1996, 1337-1341.
7Kang M, Enjeti P N, Pitel I J. Analysis and design of electronic transformers for electric power distribution system[J]. IEEE Trans on Power Electronics, 1999, 14(6):1133-1141.
8Manjrekar M D, Kieferndorf R, Venkataramanan G,Power electronic transformers for utility applications[C]. Conference record of the 2000 IEEE-IAS Annual Meeting. [s.1. ], 2000, 4:2496-2502.
9Ronan ER, Sudhoff S D, Glover S F, et al. A power electronic-based distribution transformer[ J ]. IEEE Trans on Power Delivery. 2002, 17(2):537-543.
10Marehesoni M, Novaro R, Savio S. AC locomotive conversion systems without heavy transformers, is it a practicable solution? [C]. Proeeedings of the 2002 IEEE International Symposium on Industrial Electronics. [s.1.], 2002, 4:1172-1177.
