The presence of CPLs in the DC-bus provides additional constraints for the control design deteriorating the stability and dynamic performance of the three-phase rectifiers. Although conventional linear control approaches are able to regulate the DC-bus around the design operating point, they are ineffective when large CPL transients are applied, obtaining large settling times and voltage/current overshoot that can lead to system failure due to the collapse of the DC-bus. This work introduces a novel geometric-based controller that improves the dynamic performance of three-phase rectifier loaded with CPLs. The design and operation of the proposed controller are based on the normalized decoupled model of the rectifier in the synchronous reference frame (SRF). The derived model provides a simple graphical representation of the operating point dynamics in the state plane. The insights provided by the state-plane analysis can be applied to derive a control law that achieves improved transient responses. To validate the implementation and improvements of the proposed controller, experimental results are provided