Kiyoshi Miyaike

Development of 70 MW class superconducting generator with quick-response excitation

The development of a superconducting generator had been carried out for 12 years under the first stage of a Super GM project. The 70 MW class model machine with quick response excitation was manufactured and evaluated in the project. This type of superconducting generator improves power system stability against rapid load fluctuations at the power system faults. This model machine achieved all development targets including high stability during rapid excitation control. It was also connected to the actual 77 kV electrical power grid as a synchronous condenser and proved advantages and high-operation reliability of the superconducting generator.

Recent R&D Status on 70 Mw Class Superconducting Generators in Super-GM Project

Super-GM has developed three types of 70 MW class superconducting generators (called model machines). On-site verification tests of the model machines were completed successfully in June 1999. World’s highest generator output (79 MW), world’s longest continuous operation (1500 hours) and other excellent results are obtained in the tests. Basic performance and reliability and operability of superconducting generators were verified through the comprehensive studies on the model machines. With the results, it is expected that fundamental technologies for a 200 MW class pilot machine are established.