一种用于抑制混合动力电驱系统母线电压泵升的前馈补偿控制策略

发布时间：2018-03-23 21:17

本文选题：混合动力　切入点：交直交驱动系统　出处：《湖南大学学报(自然科学版)》2017年08期

【摘要】：在应用于工程装备的混合动力交直交电驱系统中,永磁同步电机在进行再生制动时往往回馈过量的电功率至直流母线上,容易引起直流母线电压泵升,影响发动/发电机组的运行性能.为解决该问题,从电机制动时逆变器和储能系统双向DC/DC占空比匹配不一致的角度分析母线电压泵升的原因,在此基础上提出了一种在传统逆变器双闭环矢量控制的转速外环上添加前馈补偿的控制策略,通过将直流母线电压与其参考值的误差进行比例-微分调节,并利用其输出的补偿量作为下垂因子作用于q轴电流给定值上,减小电机制动阶段的转矩电流和逆变器的占空比,限制电机回馈的电功率.仿真结果表明,该控制策略能有效改善混合动力电驱系统电机制动阶段母线电压泵升的问题,能较好地保护母线电气安全.
[Abstract]:In the hybrid AC DC drive system used in engineering equipment, the permanent magnet synchronous motor (PMSM) often returns the excessive electric power to the DC bus during the regenerative braking, which can easily cause the DC bus voltage pump to rise. In order to solve this problem, the cause of bus voltage pump lift is analyzed from the angle of inconsistent duty cycle matching between inverter and energy storage system during motor braking. On the basis of this, a control strategy of adding feedforward compensation to the speed outer loop of double closed loop vector control of conventional inverter is proposed. The error between DC bus voltage and its reference value is adjusted proportionally and differential by adjusting the error between DC bus voltage and its reference value. The output compensation is used as the sag factor to reduce the torque current and the duty cycle of the inverter in the braking phase of the motor, and to limit the electrical power of the motor feedback. The simulation results show that, The control strategy can effectively improve the bus voltage pump in the motor braking stage of hybrid electric drive system, and can better protect the electrical safety of the bus bar.
【作者单位】：湖南大学电气与信息工程学院;湖南机电职业技术学院;
【基金】：国家自然科学基金资助项目(51577052) 湖南省教育厅科技项目(16C0571)~~
【分类号】：TM341

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