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Sliding mode control strategy for microgrid inverter systems

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Abstract

To enhance the voltage control performance of the microgrid inverter and reduce the influence of load disturbance, a sliding mode control method based on a new compound reaching law is proposed. The compound reaching law is designed by adding a variable exponential power term into the exponential reaching law, and replacing the switching function by a hyperbolic tangent function to enhance convergence rates of the sliding mode variables and speed up the system response. Based on the adaptive estimation of the load disturbance, an adaptive sliding mode control law is designed to accomplish the voltage control of a microgrid inverter. Simulation results show that the new compound reaching law has a faster convergence speed than existing common reaching laws, and that it can reach the sliding mode surface at a speed of zero. Therefore, the sliding mode control method based on the new compound reaching law can accomplish inverter voltage control and suppress the voltage fluctuation caused by load change.

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Acknowledgements

This work was supported in part by Tianjin Technology Innovation Guidance Project (Fund) of China under Grant 21YDTPJC00550.

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Authors and Affiliations

  1. School of Control Science and Engineering, Tiangong University, Tianjin, China

    Liu Yuan, Chunbo Xiu & Xin Ma

  2. Tianjin Key Laboratory of Intelligent Control of Electrical Equipment, Tiangong University, Tianjin, China

    Chunbo Xiu & Xin Ma

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  1. Liu Yuan
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  2. Chunbo Xiu
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  3. Xin Ma
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Correspondence to Liu Yuan.

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Yuan, L., Xiu, C. & Ma, X. Sliding mode control strategy for microgrid inverter systems. J. Power Electron. 23, 821–831 (2023). https://doi.org/10.1007/s43236-022-00576-x

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  • DOI: https://doi.org/10.1007/s43236-022-00576-x

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