In this special edition the results of a national project on the development of superconducting generators (SCGs) are reported. Before these reports, the history of developing conventional generators, (that is, a larger generator needs higher technology for cooling) motivation for developing SCGs (which is on way of better cooling technologies for larger generator), key technologies of SCGs except superconducting technology, features of SCGs, (that is, larger capacity, small size, high efficiency, good characteristics for power system operation and so on, ) present situation of the development and some comments of real application are described.
