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Current control based on limit cycle stability for photovoltaic arrays

机译:基于极限循环稳定性的光伏阵列的电流控制

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摘要

This study describes a current controller, based on a Lyapunov control law and a limit cycle oscillator (LCO) to provide stability into the grid-connected photovoltaic (PV) system during grid faults. The current controller also ensures an efficient current injection and active power regulation. The proposed controller offers a high degree of immunity and robustness against perturbation on the grid, due to the three-phase LCO - frequency locked loop (FLL) synchronisation technique. The LCO-FLL is used to compute the positive and negative sequence components of the grid, which are used by a Lyapunov control law in order to control the injected currents into the grid. Moreover, the inverter input voltage is considered in the controller design. The control configuration is proved by two different strategies, balanced injected currents and constant active power in the presence of an unbalanced grid voltage. Simulation and experimental test results are presented to demonstrate the proficiency and performance of the proposed technique in grid-connected PV systems.
机译:本研究描述了基于Lyapunov控制法的电流控制器和限制周期振荡器(LCO),以在网格故障期间提供进入网格连接的光伏(PV)系统的稳定性。电流控制器还确保了有效的电流注入和有源功率调节。由于三相LCO频率锁定环(FLL)同步技术,所提出的控制器提供了高度的免疫力和鲁棒性对网格的扰动。 LCO-FLL用于计算栅格的正序和负序列组件,该网格由Lyapunov控制规律使用,以便将注入的电流控制到网格中。此外,在控制器设计中考虑了逆变器输入电压。在存在不平衡电网电压的情况下,通过两种不同的策略,平衡注入电流和恒定的有效功率证明控制配置。提出了仿真和实验测试结果,以证明网格连接的光伏系统中提出的技术的熟练度和性能。

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  • 来源
    《Renewable Power Generation, IET》 |2020年第5期|725-733|共9页
  • 作者单位

    Inst Potosino Invest Cient & Tecnol Appl Math Div Camino Presa San Jose Lomas 4a Secc ZC San Luis Potosi 78216 San Luis Potosi Mexico;

    Inst Tecnol Celaya Elect Engn Dept Av Tecnol & A Garcia Cubas S-N AP 57 Celaya 38010 Mexico;

    Inst Potosino Invest Cient & Tecnol Appl Math Div Camino Presa San Jose Lomas 4a Secc ZC San Luis Potosi 78216 San Luis Potosi Mexico;

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