<p>The 10&#xa0;kV H-bridge five-level active neutral-point-clamped converter delivers a 9-level output voltage, and with its wide output range, inherent phase expandability, and high-voltage, high-capacity performance, it is well-suited for ship propulsion systems. This paper presents the key technology research and experimental verification for this topology. First, a main circuit topology and snubber circuit are designed, for accommodating the direct series connection of the switching devices required for 10&#xa0;kV operation. Second, a dedicated space vector pulse width modulation strategy is proposed for the H-bridge five-level active neutral-point-clamped. The proposed strategy achieves complete decoupling control of the DC-link and floating capacitor voltages inherent to the five-level active neutral-point-clamped, while enabling the optimization of the operational performance through switching constraint adherence, total switching action minimization, and common-mode voltage amplitude reduction per vector. Third, according to the characteristics of the five-level active neutral-point-clamped circuit, a solution to address the inconvenient pre-charging of floating capacitors is developed. In addition, a novel switching method is introduced to eliminate the output voltage zero-crossing level-jump phenomenon. Finally, these key technologies are validated through experiments conducted on a 10&#xa0;kV H-bridge five-level active neutral-point-clamped converter prototype. This paper provides essential technical support for advancing 10&#xa0;kV five-level active neutral-point-clamped H-bridge converters in high-power marine applications.</p>