Hydrogen energy plays an important role in improving the operation efficiency and reliability of power systems with high renewable energy penetration. Hydrogen to power (HtP) system is the key link of hydrogen applications. However, the single HtP equipment is limited in power output range and efficiency. Hybrid HtP system is an important scheme to realize the performance complementary. However, the hybrid HtP system is coupled with hydrogen system and power system. The characteristics of each subsystem and coupling characteristics are complex. In addition, the multiple support potential of hybrid HtP system for power system needs to be fully explored. In this paper, firstly, a power system including traditional units, high penetration renewable energy generation and hybrid HtP system is established. Secondly, a bi-level hybrid HtP system optimal configuration model including planning and operation is constructed. Then, a bi-level optimal configuration method based on improved PSO algorithm is proposed. Finally, the optimization model and its solution method are applied to IEEE one area RTS-96. The discussions based on the optimization results show that the hybrid HtP system has significant contributions in optimizing the output cost of traditional units, improving the utilization of renewable energy, and reducing load shedding losses.