Disturbance-Observer-Based PBC for Static Synchronous Compensator Under System Disturbances
Disturbance-Observer-Based PBC for Static Synchronous Compensator Under System Disturbances
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DOI：
10.1109/tpel.2019.2900694
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发表时间：
2019-02
影响因子：
6.7
通讯作者：
J. Lai;Xin Yin;Lin Jiang;Xianggen Yin;Zhen Wang;Z. Ullah
中科院分区：
文献类型：
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作者：
J. Lai;Xin Yin;Lin Jiang;Xianggen Yin;Zhen Wang;Z. Ullah
基于无源的控制（PBC）依赖于精确的数学模型，因此其性能会因对参数不确定性、建模误差和外部干扰的鲁棒性较弱而降低。而且，在参数不确定性和建模误差的情况下，无法实现稳态电流的零跟踪误差。本文提出了一种新型基于扰动观测器（DO）的 PBC（DO-PBC），用于静态同步补偿器（STATCOM），以实现更好的稳定性和抗扰动动态性能。 PBC电流环中引入DO来补偿系统扰动，可以提高控制系统的鲁棒性，消除稳态跟踪误差。此外，所提出的 DO-PBC 在处理各种干扰时提供更快的响应。然后，研究并提出了详细设计过程、稳定性和鲁棒性分析以及参数调整方法。此外，所提出的方法易于通过分离原理实现。通过仿真测试和基于380 V STATCOM小型实验室样机实验的实验测试，对比例积分法、传统PBC和本文提出的DO-PBC进行了性能比较，以证明该方法抗干扰和精确电流跟踪的有效性。
Passivity-based control (PBC) relies on an accurate mathematical model and thus its performance will be degraded by the weak robustness against parameters uncertainties, modeling error, and external disturbances. Moreover, it cannot achieve zero tracking error of the steady-state current under parameter uncertainties and modeling error. This paper proposes a novel disturbance-observer- (DO) based PBC (DO-PBC) for static synchronous compensator (STATCOM) to achieve better stability and dynamic performances against disturbances. A DO that has been introduced into the PBC current loop is used to compensate system disturbances, which can improve the robustness of the control system and eliminate the steady-state tracking error. Moreover, the proposed DO-PBC provides faster responses in handling various kinds of disturbances. Then, the detail design process, stability and robustness analysis, and parameters tuning method are investigated and presented. Also, the proposed method is simple to be implemented by the separation principle. The performance comparisons among the proportional integral, the conventional PBC, and the proposed DO-PBC are carried out to show the effectiveness of the proposed method against disturbances and the precise current tracking, via simulation tests and experimental tests based on a down-scale laboratory prototype experiment of 380 V STATCOM.