Rong LIU, Ke CHEN, Tiangui RAO. A Beat Frequency Suppression Control Method Based on a Second-order Generalized Integrator. [J]. Electric Drive for Locomotives 0(6):59-65(2021)
DOI:
Rong LIU, Ke CHEN, Tiangui RAO. A Beat Frequency Suppression Control Method Based on a Second-order Generalized Integrator. [J]. Electric Drive for Locomotives 0(6):59-65(2021) DOI: 10.13890/j.issn.1000-128x.2021.06.008.
A Beat Frequency Suppression Control Method Based on a Second-order Generalized Integrator
In rail transit traction systems, due to the use of single-phase recti fiers, the DC input voltage of the inverter contains a ripple component whose frequency is twice the frequency of the grid-side voltage, which will cause the torque and current of the traction motor to pulsate. In order to reduce the pulsation, a beat frequency suppression control method based on a second-order generalized integrator was proposed. First, the second-order generalized integrator was used to accurately extract from the ripple component, and then the phase compensation information was injected to form the beat frequency suppression component, and finally the beat frequency suppression component was superimposed on the magnetic link to achieve beat frequency suppression. At the same time, the two optimization strategies were compared, and the optimization of the control method was realized according to the pulsation suppression effect. The simulation veri fied the accuracy of ripple components extraction and the effectiveness of low-frequency current and torque ripple suppression.
关键词
牵引系统纹波分量二阶广义积分器拍频抑制仿真电力机车
Keywords
traction systemripple componentsecond-order generalized integratorbeat frequency suppressionsimulationelectric locomotive
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