CAJ | 학술논문

变频器产生的间谐波问题在电力系统中日益受到重视。本文以常见的电流型变频器为例,使用谐波调制理论,并结合开关函数的傅里叶分析,分析电流型变频器的等效阻抗特性,进一步推算电流型变频器在电源侧产生间谐波的机理,并由此建立适合工程应用的变频器间谐波模型。作为验证,依托某抽水蓄能电站实际变频起动装置,结合计算机仿真模拟,其对比结果表明了该模型的可靠性。
변빈기산생적간해파문제재전력계통중일익수도중시。본문이상견적전류형변빈기위례,사용해파조제이론,병결합개관함수적부리협분석,분석전류형변빈기적등효조항특성,진일보추산전류형변빈기재전원측산생간해파적궤리,병유차건립괄합공정응용적변빈기간해파모형。작위험증,의탁모추수축능전참실제변빈기동장치,결합계산궤방진모의,기대비결과표명료해모형적가고성。
Inter-harmonics in frequency converters has gained more and more attention.This paper takes common current source inverter（CSI）as an example,and adopts the modulation theory and Fourier analysis of the switch function to analyze the equivalent impedance characteristic of the CSI, and further deduce the mechanism of CSI producing harmonics in the source side,from which the inter-harmonic model of frequency converter for engineering application is established.Relying on the practical variable frequency starting system of a pumped storage power station and combining with computer simulation,the comparing results verify the reliability of the model.