Converter parameterized constant admittance modeling method based on cross initialization

The invention discloses a converter parameterization constant admittance modeling method based on cross initialization, which comprises the following steps: (1), performing parameterization modeling on a converter, adopting a parameter historical current source constant admittance model by a switch, and establishing a model by other elements based on an EMTP theory; (2) detecting whether state switching occurs, and if yes, performing cross initialization correction; (3) determining model parameters, and establishing a whole-network equivalent admittance matrix and an injection current source to obtain an electromagnetic transient simulation equivalent model; (4) solving the network power flow according to a basic solving equation I = YU to obtain a simulation result of the electromagnetictransient model of the converter at the current moment; and (5) calculating an equivalent admittance matrix and an injection current source at the next moment through the current network state quantity, and returning to the s