用于调相机-飞轮储能系统的磁齿轮调速器设计

The electromagnetic design of magnetic-geared speed regulator （MGSR） in the energy storage system with synchronous condenser and flywheel for new energy station is introduced. Based on the operation principle of coaxial magnetic gear，by changing the frequency of the stator current，the MGSR achieves step-less change of the flywheel speed and the power flow between the flywheel and the synchronous condenser whose speed is constant. Equipped with MGSR，the synchronous condenser is capable of not only regulating reactive power but also providing active power support. The basic structure，the regulation range of speed and frequency and other basic operation conditions of MGSR are determined. The electromagnetic performance of MGSR with different configurations of permanent magnets and different dimensions of modulating ring and stator slots are calculated and compared by using finite element software，and the V-shaped permanent magnets，the width and thickness of modulating pieces and the shape of stator slots are selected for the final design. This design increases the torque density of magnetic-geared speed regulator significantly and achieves fairly high operational efficiency.