A method of manufacturing a large flywheel enrgy storage device

摘要

A method of manufacturing a large flywheel energy storage device 61 with multi megawatt hours storage capacity is provided. The manufacturing method uses composite winding technology, on site, to overcome the transportation difficulties associated with such flywheels. This is accomplished by manufacturing a spool / mandrel in a factory environment (see Figure 1), which is transportable by road, by special permit, to site and using this as the starting point on site to wind the remainder of the flywheel 61 on a prepared foundation. The winding process can be fibre / resin or cured preformed composite profile / resin. The winding operation is carried out in a controlled environment, necessitating the use of a temporary or permanent building to house the complete flywheel, winding magazine system for fibres or shipping drums for composite profile, resin application system, a temporary rotating system, tension control and curing and cooling system as necessary. The preferred embodiment is one where a variable speed hydraulic or hydrodynamic or magnetic gearbox drive, coupled to the flywheel, is linked to a constant speed synchronous generator giving perfect wave form and satisfying grid codes in terms of Low Voltage Ride Through.