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Control method for single-phase grid-connected LCL inverter

机译:单相并网LCL逆变器的控制方法

摘要

A method of controlling the grid-side current of a single-phase grid-connected converter having an LCL filter connected between the output of the converter and the grid includes measuring a grid voltage and at least one signal in a group of signals consisting of a grid-side current, a converter-side current and a capacitor voltage, estimating the fundamental component of the grid voltage, forming a grid-side current reference, a converter-side current reference and a capacitor voltage reference for the grid-side current of the LCL filter, forming estimates for the non-measured signals in the group of signals, forming a grid-side current difference term, a converter-side current difference term and a capacitor voltage difference term, and controlling the output voltage of the converter based on the grid voltage, a formed injection term and a formed estimate of the harmonic distortion term to produce a grid side current corresponding to the current reference.
机译:一种控制具有连接在该转换器的输出和电网之间的LCL滤波器的单相并网转换器的电网侧电流的方法,该方法包括测量电网电压和一组信号中的至少一个信号,该信号组包括:电网侧电流,转换器侧电流和电容器电压,估算电网电压的基本分量,从而形成电网侧电流参考,转换器侧电流参考和电容器电压参考,用于电网侧电流LCL滤波器,形成信号组中未测量信号的估计值,形成电网侧电流差项,转换器侧电流差项和电容器电压差项,并基于此控制转换器的输出电压在电网电压上,形成的注入项和谐波失真项的形成的估计值产生与电流参考相对应的电网侧电流。

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