There is an increasing demand for functional testing, grid adaptability experiments, joint operation verification, and other applications to multi type power converters of new energy. The use of hardware in the loop (HIL) method to conduct comprehensive testing of the converters system before on-site operation is an important verification method. This paper designs a power hardware in the loop (PHIL) system architecture based on the combination of real-time controller and converter hardware to meet the grid connection testing requirements of the wind-hydrogen-storage multi-converters system. A real-time simulation controller based on C MEX S-Function is constructed, and the control strategies for wind-hydrogen-storage converters under non-ideal grid are proposed. Through the experimental platform built, high-precision real-time control of new energy power multi-converters are achieved, and the proposed multi-converters control architecture and control strategies are verified.