With the increase of the number and capacity of MMC-HVDC projects, the multiple MMC-HVDC feeding into weak AC system will be a very common scene in the future reginal power grid. This paper studies the control strategy for such scenes. In order to make the MMC station have the same characteristics as the synchronous generator, the synchronous generator emulation control (SGEC) is proposed. The control method consists of three loops, namely active power and frequency loop (PF loop), reactive power and voltage loop (QU loop), and inner current loop. The PF loop is used to simulate the swing process of the synchronous generator (SG). The QU loop is used to simulate the exciter system of the SG. The inner current loop serves to limit fault currents and increase MMC response speed. For the multi-infeed MMC-HVDC system, a novel control of dynamic power allocation is proposed. This control scheme can not only allocate the power among MMC stations precisely, but also achieve the secondary frequency regulation. Finally, the effectiveness of the proposed control strategy is verified through the PSCAD/EMTDC simulation of improved 3 machine 9 node system.