Frequency-domain dissipativity of the converter admittance provides an intuitive approach to analyze wideband resonances due to the interactions with the grid. Although the reasons for high-and low-frequency resonances are different, it is found that the proportional capacitor voltage feedforward (CVF) can affect and reshape the converter admittance in a wide frequency range. To enhance wideband dissipativity under a weak/capacitive grid, a proportional-integral-derivative CVF is proposed in this paper. Specifically, high-frequency dissipativity can be guaranteed through the multi-sampling control with proportional-derivative CVF. The low-frequency non-dissipative region caused by the phase-locked loop and proportional CVF can be compensated through multi-order integrations. In light of grid frequency disturbances, modified integrators are further proposed for the multi-order integrations. The proposed method also applies to the conventional double-sampling control with regard to the low-frequency dissipativity enhancement. Finally, experiments validate the proposed control method.