With high DC voltage utilization rate， an alternate-arm multilevel converter（A2MC） based on insulated gate bipolar transistors（IGBTs） has DC fault blocking capability. Given that IGBTs are low in withstanding voltage with high loss and high cost， the IGBTs used as switches in A2MC are replaced by silicon controlled rectifiers（SCRs）， thus， a hybrid multilevel converter（HMC） is put forward to reduce cost without losing its advantages. This paper introduces the topology and working principle of a HMC. The nearest voltage level（NVL） modulation and balance control of H-bridge modules are proposed. Power components number， components quantity and fault blocking capability are compared between modular multilevel converter（MMC） and HMC control strategy of HMC on DC fault condition is studied. The 61-level model of HMC is set up in PSCAD/EMTDC. The feasibility and effectiveness of proposed HMC and control strategy are verified according to the simulation.