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首页> 外文期刊>Journal of power electronics >An Inductance Voltage Vector Control Strategy and Stability Study Based on Proportional Resonant Regulators under the Stationary alpha beta Frame for PWM Converters
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An Inductance Voltage Vector Control Strategy and Stability Study Based on Proportional Resonant Regulators under the Stationary alpha beta Frame for PWM Converters

机译：基于比例谐振调节器的平稳α-β框架下PWM变换器的电感电压矢量控制策略和稳定性研究

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摘要

The mathematical model of a three phase PWM converter under the stationary alpha beta reference frame is deduced and constructed based on a Proportional-Resonant (PR) regulator, which can replace trigonometric function calculation, Park transformation, real-time detection of a Phase Locked Loop and feed-forward decoupling with the proposed accurate calculation of the inductance voltage vector. To avoid the parallel resonance of the LCL topology, the active damping method of the proportional capacitor-current feedback is employed. As to current vector error elimination, an optimized PR controller of the inner current loop is proposed with the zero-pole matching (ZPM) and cancellation method to configure the regulator. The impacts on system's characteristics and stability margin caused by the PR controller and control parameter variations in the inner-current loop are analyzed, and the correlations among active damping feedback coefficient, sampling and transport delay, and system robustness have been established. An equivalent model of the inner current loop is studied via the pole-zero locus along with the pole placement method and frequency response characteristics. Then, the parameter values of the control system are chosen according to their decisive roles and performance indicators. Finally, simulation and experimental results obtained while adopting the proposed method illustrated its feasibility and effectiveness, and the inner current loop achieved zero static error tracking with a good dynamic response and steady-state performance.
机译：基于比例共振（PR）调节器推导并构建了固定αbeta参考框架下的三相PWM转换器的数学模型，该模型可以代替三角函数计算，Park变换，锁相环的实时检测提出的电感电压矢量精确计算实现前馈解耦。为了避免LCL拓扑的并联谐振，采用了比例电容器-电流反馈的有源阻尼方法。对于电流矢量误差的消除，提出了一种采用零极点匹配（ZPM）和抵消方法对内部电流环路进行优化的PR控制器，以配置调节器。分析了PR控制器和内电流环路中控制参数的变化对系统特性和稳定性裕度的影响，并建立了有源阻尼反馈系数，采样和传输延迟与系统鲁棒性之间的关系。通过零极点轨迹，极点放置方法和频率响应特性，研究了内部电流环路的等效模型。然后，根据控制系统的决定性作用和性能指标选择控制系统的参数值。最后，采用该方法的仿真和实验结果证明了该方法的可行性和有效性，内电流环实现了零静态误差跟踪，具有良好的动态响应和稳态性能。

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