用于调相机-飞轮储能系统的磁齿轮调速器设计

Design of magnetic-geared speed regulator in energy storage system with synchronous condenser and flywheel

介绍一种用于新能源场站调相机-飞轮储能的磁齿轮调速器的电磁设计。基于同心式永磁齿轮的运行机理,该调速器通过改变定子绕组电流的频率,在调相机的固定转速条件下,实现飞轮的无级变速及其与调相机之间的功率交换,使调相机在传统的无功调节功能基础上,增加有功支撑的能力。确定了磁齿轮调速器的基本结构和调速、供电频率范围等基本运行条件,采用有限元软件计算和对比具有不同的永磁体布置与充磁方向、调制环和定子槽基本结构尺寸的磁齿轮调速器的电磁性能,并选定内置V形永磁体和一定的调制块厚度、宽度及定子槽形,作为最终设计方案。该设计方案显著提高了磁齿轮调速器的转矩密度,并具有较高的运行效率。

The electromagnetic design of magnetic-geared speed regulator(MGSR)in the energy storage sys⁃tem 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 perfor⁃mance 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 perma⁃nent 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.