Abstract: With the proposal of new power system action plans, novel converter valves such as digitally driven thyristor-based converter valves and turn-off converter valves with controllable commutation capabilities have emerged. High-voltage self-energy gaining technology is one of the key technologies for DC converter valve applications. Aiming at the driving energy supply issue for power semiconductor devices in new HVDC converter valves, this paper proposes a high-voltage self-energy gaining circuit integrated with the damping circuit of power semiconductor devices, combining energy extraction and voltage limiting. First, the working principle of the proposed circuit is analyzed, and its energy conversion mechanisms under different operational modes are elaborated. Then, parameter design methods and control strategies for key circuits such as voltage limiting and rectification are presented. Finally, through simulations and experimental verification using practical cases, the effectiveness and feasibility of the proposed solution in real-world applications are demonstrated. The results show that the proposed solution reliably harvests energy whether the power semiconductor devices withstand forward/reverse voltages or are in conduction, making it applicable to various series-connected converter valve scenarios.