The invention discloses a
virtual impedance compensation method for
permanent magnet synchronous generator constant
admittance modeling, and relates to the technical field of electromagnetic transient modeling of permanent
magnet synchronous generators, and the method comprises the steps: firstly, carrying out the
discretization of a
permanent magnet synchronous generator model; secondly, decomposing the equivalent resistance matrix into a time-invariant part and a time-varying part; then,
virtual impedance is added to the q axis of the generator model; thirdly, constructing a generator constant
admittance model; thirdly, a converter accompanying
discrete circuit model is integrated, a complete
permanent magnet synchronous generator constant
admittance model is formed, and a node admittance equation is established based on the Kirchhoff's current law; and finally, executing electromagnetic transient
simulation. According to the method, constant admittance modeling is achieved based on
virtual impedance compensation, the requirement for real-
time inversion of a time-varying admittance matrix is eliminated,
simulation calculation
resource consumption is remarkably reduced, small errors are kept under various working conditions, and efficient
simulation of a large-scale permanent
magnet synchronous generator
system is supported.