大型同步电机交交变频调速系统对电网的谐波影响分析  

Harmonic Analysis of Power Supply Net Side with Large Synchronous Frequency Speed Drive System

作　　者：王继忠[1,2] 李江昀[1,2] 

机构地区：[1]北京科技大学自动化学院,北京100083 [2]钢铁流程先进控制教育部重点实验室,北京100083

出　　处：《电子学报》2014年第5期1035-1040,共6页Acta Electronica Sinica

基　　金：北京市重点学科共建项目(No.XK100080537);新世纪优秀人才支持计划(No.NCET-11-0578);中央高校基本科研业务费专项资金(No.FRF-TP-12-005B)

摘　　要：针对热连轧机组中同步电动机主传动的交-交变频调速系统,定量分析了同步电机负载经由交交变频器对变压器供电网侧产生的谐波影响.分别对不同的负载参数、变压器原副边电感量和变流装置的进线电抗器参数的情况进行了仿真分析.同时,对大型多组交交变频器移相组合式供电进行了数据移位方式仿真.并且对交-交变频器和交-直-交变频器所产生的谐波干扰进行了对比分析.仿真结果表明调节变压器原副边电感量再结合移相组合式供电的方法可以有效地降低大型同步机负载对供电网侧的谐波干扰,并使得总谐波率在各相中分布趋向均衡.For AC to AC variable frequency speed drive system of synchronous motors applied in hot strip continuous mills, the harmonic impact on power supply net side is analyzed in detail by advanced simulation approach. Variety of situations have been studied by changing parameters of different parts in the synchronous frequency speed drive system, such as internal inductance of o- riginal/secondary sides of the transformers, external line commutating reactors and several kinds of synchronous motors with differ- ent resistance and inductance. An approach of power supply is proposed that adopting multi-group AC-AC inverters with incremental-shifting phase module to supply power. A comparative analysis of harmonic interference between the AC-AC inverter and AC- DC-AC inverter is given. Simulation results show that the approach combination regulating transformer inductance with the incre mental-shifting phase modular power supply can effectively reduce harmonic interference and make the total harmonic distribution tend to be balanced in three phases.

关 键 词：交-交变频器 电力拖动 总谐波畸变率 热连轧 

分 类 号：TM921[电气工程—电力电子与电力传动]