Abstract: To solve the delay problems in the digital processing of the three-phase pulse width modulation (PWM) rectifier predictive direct power control (PDPC) strategy, we design a two-step prediction method to eliminate the delay and a feedback correction link to correct the inaccurate reference power in the traditional PDPC strategy, so as to eliminate the deviation between the actual power and reference power. In the three-phase PWM rectifier, a grid voltage sensor makes the whole system complex and costly. Therefore, we use an improved second-order generalized integrator (SOGI) to generate orthogonal signals of the same frequency and to estimate the grid voltage. Then, we apply a grid voltage sensor-free algorithm based on the improved SOGI to the optimized PDPC strategy. The proposed method is simulated on the simulation platform. Simulation results show that the proposed method can eliminate power tracking deviation and accurately estimate the grid voltage. The effectiveness of the proposed method is verified by comparing the simulation results of the traditional and optimized PDPC strategies.