摘要
为研究飞轮储能系统(FESS)的性能,设计并制作了一套基于机械轴承的、采用无刷直流电机驱动的飞轮储能系统,对驱动电机及整套系统在转速小于10 000 r/min时的损耗分别进行了测量.分析了电损、风损和轴承损耗3种主要损耗,采用最小二乘法,对电损与转速的关系进行指数函数拟合,对风损、轴承损耗与转速的关系进行了多项式拟合,从而分离了3种损耗.对处于不同待机转速的飞轮储能系统的恒功率放电时间和经历了不同待机时间的能量利用系数进行了计算分析.结果表明:要提高FESS的效率必须采用磁悬浮轴承并将系统置于真空环境中;FESS恒功率放电时间与待机转速成1.8次方关系;待机转速和待机时间是能量利用系数的重要影响因素.研究结果为新能源发电系统对FESS的选择提供了理论依据.
In order to study the performance of flywheel energy storage system （FESS）, an FESS with mechanical bearings driven by a brushless DC motor （BLDCM） was designed and manufactured and the loss of BLDCM and the system under 10 000 r/min were tested, respectively. The three main losses including electrical loss, wind loss and bearing loss were analyzed. The least square method was adopted to fit the relationship between the electrical loss and the rotation speed by exponential function and the relationship between the wind loss and bearing loss and the rotation speed by polynomial function, thus separating the three main losses. The discharging time by constant power under different stand-by speeds and the energy utilization ratio through different stand-by time were calculated and analyzed. The result reveals that the magnetic bearings and vacuum environment are extremely important to improve the efficiency of the FESS. Besides, the constant-power discharging time is proportional to the 1.8th power of the stand-by speed, and the energy utilization ratio is significantly affected by both stand-by speed and stand-by time. The research results provide a theoretical basis for the decision of FESS in renewable generation system.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期71-75,共5页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51077012)
教育部博士点基金资助项目(20090092110033)
江苏省产学研前瞻性研究资助项目(BY2011151)
江苏省"六大人才高峰"资助项目(2011-ZBZZ-016)
关键词
飞轮储能系统
损耗
无刷直流电机
能量利用系数
flywheel energy storage system
loss
brushless DC motor
energy utilization ratio
