Impedance network modeling method and device of alternating-current and direct-current hybrid system

The invention relates to the technical field of power system modeling, in particular to an impedance network modeling method and device for an alternating current-direct current hybrid system, and the method comprises the steps: building an impedance model of each power device in the alternating current-direct current hybrid system, and building an alternating current network node admittance matrix except a converter, the impedance network model of the alternating-current and direct-current hybrid system is obtained by establishing an alternating-current system admittance matrix containing a converter and a multi-port model of a direct-current network. According to the embodiment of the invention, the specific impedance model capable of representing the dynamic state of the equipment is connected through the circuit equation, and the voltage-current relationship of the system nodes is established, so that the impedance network model capable of representing the overall dynamic characteristics of the system is