High Voltage Ride Through Control Strategy of PMSGs Based on Active Disturbance Rejection Control Technology

Mengyang ZHANG; Yili LIU; Xiaolong ZHU; Shengxing LIU

doi:10.16513/j.2096-2185.DE.2308501

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Distributed Energy ›› 2023, Vol. 8 ›› Issue (5) : 1-9. DOI: 10.16513/j.2096-2185.DE.2308501

Basic Research

High Voltage Ride Through Control Strategy of PMSGs Based on Active Disturbance Rejection Control Technology

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Abstract

The full power converter of direct-driven permanent magnet synchronous wind turbine generator (PMSG) is a complex system with nonlinear and strong coupling, which is easily affected by voltage fluctuation of power grid and nonlinear load. In order to improve the converter DC bus voltage, a high voltage ride through control strategy of PMSG based on improved linear active disturbance rejection control (LADRC) technology is proposed in this paper. Based on the traditional LADRC, the differential of the total disturbance is expanded into a new state variable, and the change trend of the total disturbance is observed in advance to improve the dynamic disturbance observation capability of the linear extended state observer (LESO). The unloading resistance optimization scheme is adopted on the DC side, and the converter on the grid side runs in reactive power compensation mode to provide dynamic reactive power support for voltage stabilization. The simulation results under various operating conditions indicate that this control strategy reduces the fluctuation range of DC bus voltage while reducing the adjustment time, effectively improving the anti-interference capability of DC bus voltage, ensuring that the PMSG does not disconnect from the grid for continuous operation during high voltage faults, and providing a certain amount of inductive reactive power to help restore stability to the grid voltage.

Key words

direct-driven permanent magnet synchronous wind turbine generator (PMSG) / full power converter / linear active disturbance rejection control (LADRC) / high voltage ride through

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Mengyang ZHANG , Yili LIU , Xiaolong ZHU , et al. High Voltage Ride Through Control Strategy of PMSGs Based on Active Disturbance Rejection Control Technology[J]. Distributed Energy Resources. 2023, 8(5): 1-9 https://doi.org/10.16513/j.2096-2185.DE.2308501

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