DEVELOPMENT OF A 1-KWH-CLASS MODULE-TYPE SMES-DESIGN STUDY

We are planning to build a 1kWh/1MW(Maximum stored energy/Maximum powe r capability) module-type SMES (named ESK; Experimental SMES of Kyushu Electric Power) as a first step to aiming at the realization of pract ical SMESs for power line control. Main points of the design are those of module-type coils (each 3 coils and a converter as one unit of 2 m odules) for the development to scale up a capacity of SMES, the choice of low loss stranded cables for reducing of pulse operating loss, the choices of modified D shape coils reduced of stresses in the conducto r which become more serious in the scaling up, and high Tc superconduc tor (HTS) current leads for covering a weak point on thermal loss in a module-type SMES which needs many current leads. Some other points ar e also studied such as; design of cooling system in which a quench of coil does not induce that of other, and harmonics suppression in the c onverter system.