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电子学报  2014 

大型同步电机交交变频调速系统对电网的谐波影响分析

DOI: 10.3969/j.issn.0372-2112.2014.05.033, PP. 1035-1040

Keywords: 交-交变频器,电力拖动,总谐波畸变率,热连轧

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Abstract:

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.

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