摘要 : This paper presents a new technique to adapt the cascaded delayed signal cancellation phase-locked loop (CDSC-PLL) using a proposed axis drift control (ADC). When grid frequency changes, the estimated grid angle by PLL drifts with... 展开 This paper presents a new technique to adapt the cascaded delayed signal cancellation phase-locked loop (CDSC-PLL) using a proposed axis drift control (ADC). When grid frequency changes, the estimated grid angle by PLL drifts with a residual error proportional to the frequency change value thus, the accuracy and performance of the conventional CDSC-PLL is deteriorated which can lead to malfunction of the connected applications. Accordingly, CDSC-PLL type has to be adaptable to frequency changes with high immunity to grid disturbances. Designing frequency adapted CDSC-PLL is complex and needs a dedicated design due to the high nonlinearity introduced by adaptive loops. The ADC is proposed as an online adaptive technique that contains a self-tuned DSC operator to mitigate the grid disturbances and a PI controller to perform the adaptation task. The proposed technique is mathematically analyzed and systematic tuning methods are presented. A new analysis for CDSC under off-nominal sample parameter is presented and verified. The robustness of proposed adaptive controller is investigated under parameters uncertainty and various grid disturbances. The proposed technique is numerically and experimentally verified. 收起