A Discrete-Time Repetitive Sliding Mode Control for Voltage Source Inverters
A Discrete-Time Repetitive Sliding Mode Control for Voltage Source Inverters
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DOI：
10.1109/jestpe.2017.2781701
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发表时间：
2018-09
影响因子：
5.5
通讯作者：
Lijun Zheng;Fayang Jiang;Jiancheng Song;Yunguang Gao;Muqin Tian
中科院分区：
文献类型：
--
作者：
Lijun Zheng;Fayang Jiang;Jiancheng Song;Yunguang Gao;Muqin Tian
电压源逆变器（Voltage Source Inverter，VSI），特别是关键负载的不间断电源，要求具有稳态性能高、瞬态响应快、鲁棒性强等特点。然而，传统的控制方法很难同时达到上述要求。提出了一种基于指数型双幂趋近律的离散时间重复滑模控制器（DSMC），该控制器结合了离散时间滑模控制（DSMC）和重复控制（RC）的特点，能够满足三相逆变器的上述要求。此外，基于指数的双幂趋近律的建议，以进一步减少系统的抖振，提高系统的动态响应。采用等效控制的原则，以整合两种方法，并方便所提出的方案的设计和分析。建立了电压源逆变器的离散系统方程。选择电容器的电压误差和电流误差作为系统状态变量，利用所提出的趋近律设计了电压源逆变器的DRSMC。然后将RC嵌入到DSMC的前向误差路径中。推导了DRSMC的系统方程，设计了控制器参数，分析了系统的稳定性。最后，一个6千瓦的三相逆变器的建立，以验证所提出的方法的有效性，通过比较DSMC和RC。
Voltage source inverters (VSIs), especially uninterrupted power supply for critical loads, require high steady-state performance, fast transient response, and strong robustness. However, it is difficult to achieve above requirements simultaneously by traditional control methods. A discrete-time repetitive sliding mode controller (DRSMC) with an exponential-based bi-power reaching law for three-phase VSIs is proposed, which combines the features of both the discrete-time sliding mode control (DSMC) and the repetitive control (RC) to achieve above requirements in VSIs. Furthermore, an exponential-based bi-power reaching law is proposed to further reduce the system chattering and improve the system dynamic response. The principle of equivalent control is adopted to integrate two methodologies and to facilitate the design and analysis of the proposed scheme. The discrete system equation of VSI is established. Voltage error and current error of capacitor are selected as the system state variables, and the DRSMC of VSI is designed with the proposed reaching law. Then RC is embedded into the forward error path of DSMC. The system equation of the DRSMC is deduced, the controller parameters are designed, and the system stability is analyzed. Finally, a 6-kW three-phase inverter setup is built to verify the effectiveness of the proposed method by comparing with DSMC and RC.