350 MW火电机组磨煤机永磁同步电机节能改造性能分析  

Performance Analysis of Permanent Magnet Synchronous Motor for Coal Mill in One 350 MW Thermal Power Plant Energy Saving Retrofit Project

作　　者：王晓楠 吕艳会 WANG Xiao-nan;LV Yan-hui(Guodian Science and Technology Research Institute Limited Shenyang Branch,Shenyang 110000,China;BMW Brilliance Automotive Ltd.,Shenyang 110000,China)

机构地区：[1]国电科学技术研究院有限公司沈阳分公司,辽宁沈阳110000 [2]华晨宝马汽车有限公司,辽宁沈阳110000

出　　处：《通信电源技术》2020年第3期223-225,共3页Telecom Power Technology

摘　　要：目前,异步电动机在火力发电厂中应用广泛,但其不足之处也较为明显,主要表现在功率因数低、经济运行范围较窄、启动转矩倍数低及工作效率低等。永磁同步电动机与异步电动机相比,无需电网提供额外的励磁电流,运行中定子电流低,其效率和功率因数都大幅提高,具有明显的节能效果。本文介绍了永磁同步电机应用现状,并通过某350 MW火电机组磨煤机节能改造实例,在不同运行工况下对比分析了异步电机与永磁同步电机的运行情况。试验结果表明,永磁同步电机的节能效果显著,具有明显的经济效益。At present,asynchronous motors are widely used in thermal power plants,but their shortcomings are also more obvious,mainly in terms of low power factor,narrow economic operation range,low starting torque and low work efficiency.Compared with asynchronous motors,permanent magnet synchronous motors(PMSM)do not need additional excitation current from the grid.The stator current is lower during operation,and their efficiency and power factor are greatly improved,which has obvious energy saving effects.This paper introduces the current application status of permanent magnet synchronous motors,and analyzes the operation between asynchronous motors and permanent magnet synchronous motors under different operating conditionsthrough one energy saving retrofit of coal mill for 350 MW thermal power plant.The test results show that the energy saving effect of the permanent magnet synchronous motor is significant and it has obvious economic benefits.

关 键 词：火力发电厂 永磁同步电机 异步电机 磨煤机 节能改造 

分 类 号：TM621[电气工程—电力系统及自动化] TM341