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首页> 外文期刊>Power Electronics, IET >Design of LCL-filter considering the control impact for grid-connected inverter with one current feedback only
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Design of LCL-filter considering the control impact for grid-connected inverter with one current feedback only

机译：仅考虑一个电流反馈的并网逆变器的控制影响的LCL滤波器设计

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摘要

An -filter draws much attention in grid-connected applications, but the design faces challenges. The and controller parameters are interdependent and inter-restricted as the grid current quality and control stability rely on the parameters of them both. In the past, researchers found that extra sensors or complex algorithms were required for the stability when the parameters were designed independently. Consequently, the system cost and complexity were increased. Indeed, the -filter with the delay-dependent single-loop current control can be stable if the parameters are properly selected. Based on this thought, this study proposes to design the parameters by considering their impact on the stability and dynamic of the inverter. Extra sensors or complex algorithms are no longer required. Based on establishing the model of the single-loop inverter-side current controlled inverter, the criteria of design are obtained in order to improve the stability and the rejections of low-order and switching current harmonics. Based on those design criteria, a step-by-step procedure is proposed. Selected results have been provided to demonstrate the effectiveness of the proposed design.
机译：-filter在并网应用程序中引起了很多关注，但设计面临挑战。和控制器参数是相互依存和相互制约的，因为电网电流质量和控制稳定性都依赖于两者。过去，研究人员发现，独立设计参数时，需要额外的传感器或复杂的算法来保证稳定性。结果，增加了系统成本和复杂性。实际上，如果正确选择参数，则具有与延迟有关的单回路电流控制的-filter可以稳定。基于此思想，本研究建议考虑参数对变频器稳定性和动态性的影响来设计参数。不再需要额外的传感器或复杂的算法。在建立单回路逆变器侧电流控制逆变器模型的基础上，获得设计准则，以提高稳定性和抑制低阶和开关电流谐波。基于这些设计标准，提出了分步过程。提供了一些结果来证明所提出设计的有效性。

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