弱电网条件下抑制频率耦合的并网变流器对称控制方法

The asymmetrical rotating (dq-) frame control leads to frequency coupling dynamics, which tends to bring in harmonic instability. In this article, based on the established complex signal impedance model, the influence of the grid impedance and the frequency coupling on system stability is analyzed. For the phase-locked loop (PLL) mainly affects the q-axis dynamics, it is proposed that the q-axis f...