Development of a 100 MVA high temperature superconducting generator

Abstract

General Electric, in conjunction with the US Department of Energy, has undertaken the design, manufacture and testing of a 100 MVA class high temperature superconducting (HTS) generator. The HTS rotor will be suitable for use in new generators as well as a retrofit product for existing generators. This paper discusses key areas of design and testing of the generator as first steps in the development of HTS synchronous generators.

Superconducting wind turbine generators

“…Demonstrations: An HTS SM with warm rotor In 2003, a 1.5 MVA HTS generator has been designed, built and successfully tested by General Electric as an engineering prototype for a 100 MVA turbo generator (55). The HTS coils in the 1.5 20…”

“…MVA demonstrators, wound with BSCCO HTS were designed to operate at 20K-40K (55,56). A closed cycle helium refrigeration system was employed using GM cryocoolers (56,57).…”

High-Temperature Superconducting Wind Turbine Generators

“…The fact that HTS could transport electricity with virtually no resistance at relatively high temperatures holds vast potentials and opens many doors for applications. These include electrical machines (Bumby, 1983;Superczynski & Waltman, 1997;Ship et al, 2002;Sykulski et al, 2002;Fee et al, 2003;Fogarty, 2004;Hull & Murakami, 2004;Kalsi et al, 2004;Massonet al, 2007;Choi et al, 2008;Liu et al, 2010), power transmission lines (Wang & Lancaster, 2006;Sasaki et al, 2007;Johnson et al, 2009), energy storages (de Andrade et al, 2005;Hirabayashi et al, 2008;Dai et al, 2010) and so forth. It becomes clear that the superconducting apparatus have to be sufficiently large to justify the costs of superconductors and the associated cooling system.…”

Development and Test of a Prototype 100MVA Superconducting Generator

“…The design may be optimized to reduce strain without [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] regard to the conductive penalty. A high degree of accuracy was expected in modeling the conductive heat load to the Demonstrator.…”

“…Stability margins would be even less at leading power factor operation. It appears that the transient [8][9] stability advantage of lower initial rotor angle for the superconducting generator is largely offset by its higher transient reactance and lower inertia, compared to the conventional generator. Generator field current is also shown in the figures and tables.…”