RESEARCH ON DIRECT POWER CONTROL OF VOLTAGE-TYPE RECTIFIER BASED ON VIRTUAL MAGNETIC FLUX MODEL PREDICTION

Zhou Zhenxiong; Liu Bingshen; Wang Wenbao; Peng Hongyi; Zhang Zhimin; Wang Hongxi

doi:10.19912/j.0254-0096.tynxb.2020-0238

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (2) : 136-143. DOI: 10.19912/j.0254-0096.tynxb.2020-0238

RESEARCH ON DIRECT POWER CONTROL OF VOLTAGE-TYPE RECTIFIER BASED ON VIRTUAL MAGNETIC FLUX MODEL PREDICTION

Zhou Zhenxiong¹, Liu Bingshen^1,2, Wang Wenbao¹, Peng Hongyi¹, Zhang Zhimin¹, Wang Hongxi¹

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Abstract

In this paper, a direct power control （DPC） system of voltage-type PWM rectifier （VSR） is studied. Aiming at the error of model prediction and estimation when using magnetic virtual flux to realize voltage observation without voltage sensor, a virtual magnetic flux model predictive direct power control strategy based on Newton interpolation principle to modify the model observation voltage is proposed. The Newton interpolation method is used to correct the estimated voltage of the power grid, and the internal model feedback correction is introduced to correct the errors generated by the instantaneous power model prediction at adjacent moments, so as to improve the SVPWM control voltage of the rectifier. The above method can achieve more stable power tracking, reduce the amount of overshoot caused by the start-up and regulation, effectively reduce the harmonic on the grid side of the rectifier to achieve the purpose of green rectification. Simulation comparison analysis and test results show that the VSR controlled by the above control strategy has good output quality of DC side voltage, strong anti-interference and low harmonics on grid side, and can effectively achieve green rectification and high power factor of DC output voltage.

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PWM rectifier / direct power control / model prediction / virtual magnetic flux / Newton interpolation / internal model feedback correction

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Zhou Zhenxiong, Liu Bingshen, Wang Wenbao, Peng Hongyi, Zhang Zhimin, Wang Hongxi. RESEARCH ON DIRECT POWER CONTROL OF VOLTAGE-TYPE RECTIFIER BASED ON VIRTUAL MAGNETIC FLUX MODEL PREDICTION[J]. Acta Energiae Solaris Sinica. 2022, 43(2): 136-143 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0238

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