三电平牵引变流器无拍频控制的硬件在回路实时仿真

发布时间：2018-05-19 17:43

本文选题：无拍频控制 + 三电平逆变器　；参考：《电工技术学报》2014年08期

【摘要】：针对高速列车三电平牵引变流器-牵引电机系统,探讨了无拍频控制牵引系统的硬件在回路实现方案,并进行了测试分析。本文首先对高速列车用三电平逆变器-电机系统的数学模型进行详细分析,考虑死区效应和PWM采样误差的影响建立了基于dSPACE的实时运行模型。然后,为了抑制三电平逆变器处于单脉冲控制阶段时由于拍频影响产生的电机转矩和电流脉动现象,给出了一种基于转子磁场定向瞬时改变逆变器频率的无拍频控制策略。该策略的控制原理是基于伏秒平衡原则,通过瞬时改变逆变器的输出频率来减小逆变器输出电压每周期正负半周的不平衡量。最后,对有无采用该控制策略两种情况下的控制效果进行了实时仿真测试对比,测试结果验证了该实现方案的有效性和可行性。
[Abstract]:Aiming at the three-level traction converter-traction motor system of high-speed train, the hardware in-circuit realization scheme of no-beat frequency control traction system is discussed, and the test analysis is carried out. In this paper, the mathematical model of the three-level inverter-motor system for high-speed train is analyzed in detail. Considering the dead-time effect and the influence of PWM sampling error, a real-time operation model based on dSPACE is established. Then, in order to restrain the torque and current ripple of the three-level inverter due to the impact of the beat frequency, a no-beat frequency control strategy based on the transient change of the frequency of the inverter is proposed based on the rotor flux orientation. The control principle of the strategy is based on the Voltage-second balance principle, which can reduce the unbalance of the output voltage of the inverter by changing the output frequency of the inverter instantaneously. Finally, the effectiveness of the proposed control strategy is compared with that of the proposed control strategy in real time simulation. The results show that the proposed scheme is effective and feasible.
【作者单位】：西南交通大学电气工程学院;
【基金】：中央高校基本科研业务费专项资金(SWJTU12CX025,2682013ZT19) 国家自然科学基金—高铁联合基金重点项目(U11344205);国家自然科学基金(51207131、51277153)资助项目
【分类号】：TM46

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