浅析LCL滤波器的三相并网逆变器控制技术(英文)

Study on the Three-Phase Grid-Connected Inverter Control Technique Based on LCL Filter

PWM变换器可以将电网交流侧电流进行正弦化,其功率因数可调,且谐波含量较小,被人们称作"绿色变换"。由于PWM变换器的逆变效率高的特点,现已成为国内外研究的热点。为了使用较少的电感量,以获得更好的滤波效果,本文研究了基于LCL滤波的三相并网逆变器技术,讨论和比较了有源阻尼与无源阻尼两种状态,并且与单电感滤波电路进行了比较。

PWM convertor can realize the sinusoidal current of power grid, with adjustable unity power factor or power factor and small harmonic content, and it is called 'green transformation'. PWM converter can reach the purpose of efficient invertor, becoming the hotspot in domestic and foreign studies. In order to reach better filter-loop effect with relatively little inductance, the three-phase grid-connected inverter based on LCL filter is studied in this paper, and the two states, including the active damping and inactive damping are discussed, and compared with the single-inductance circuit.