An optimized parameter design of passivity-based controller for single-phase voltage source inverters
An optimized parameter design of passivity-based controller for single-phase voltage source inverters
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DOI：
10.1016/j.ijepes.2022.108627
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通讯作者：
Ensheng Zhao;Yang Han;Yuxiang Liu;P. Yang;A. S. Zalhaf;F. Blaabjerg
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作者：
Ensheng Zhao;Yang Han;Yuxiang Liu;P. Yang;A. S. Zalhaf;F. Blaabjerg
基于无源性的控制（PBC）具有响应速度快、稳定性好、对滤波器参数变化和负载扰动具有较强的鲁棒性等优点，在单相电压源逆变器（SPVSI）中的应用受到了广泛的关注。然而，作为一种非线性控制策略，PBC控制具有复杂的耦合结构，包含前馈、负反馈等，这给多阻尼设计带来了许多困难。此外，在PBC控制器的阻尼系数设计中，如何保证孤岛系统在各种负载条件或滤波器参数漂移下的无源性仍然是一个尚未解决的问题。针对带LC滤波器的SPVSI系统，提出了一种基于稳定域分析的多阻尼PBC控制器设计方法。所设计的PBC控制器可以保证系统在多种负载条件下或LC滤波器参数存在一定偏差时的稳定性。根据各阻尼系数在控制回路中的分布情况，采用由内到外的设计顺序。因此，每个控制环具有良好的动态性能和不同的控制带宽。最后，通过鲁棒性分析、仿真和实验结果验证了多阻尼系数PBC控制器设计方法的正确性和有效性。
With the advantages of fast response, good stability, and strong robustness to filter parameter variations as well as load perturbations, the application of passivity-based control (PBC) in the single-phase voltage source inverter (SPVSI) has received extensive attention. However, as a non-linear control strategy, PBC control has a complex coupling structure containing feed-forward, negative feedback, etc., which poses many difficulties for multi-damping design. In addition, ensuring the passivity of the islanded system under various load conditions or filter parameter drift is still an unresolved issue in the damping coefficient design of the PBC controller. Therefore, for SPVSI systems with LC filters, this paper proposes a multi-damping coefficient design method for PBC controllers based on stability domain analysis. The designed PBC controller can ensure system stability under several load conditions or certain deviations of LC filter parameters. Moreover, the design order from the inner to the outer control loop is adopted according to the distribution of individual damping coefficients in the control loop. As a result, each control loop has a good dynamic performance and distinct control bandwidth. Finally, robustness analysis, simulation, and experimental results verify the correctness and effectiveness of the proposed multi-damping coefficients design method for the PBC controller.