Abstract: For the modern power systems with high penetration of voltage source converters (VSCs), it is easy to cause transient power circulation and power-frequency oscillation between VSCs following different types of disturbances. To simplify the analysis of active power-frequency dynamics for multiple-VSC systems, a circuit model describing the active power-frequency dynamics of VSC was constructed based on mechanical admittance. According to the electromechanical analogy principle, the modeling framework of synchronous generators (SGs)/VSCs was constructed, and the circuit model parameters of nine VSC control strategies were deduced. Taking a four-VSC system as an example, the circuit network model of the system was constructed. The accuracy and effectiveness of the proposed model were verified by model comparison, frequency domain characteristics and simulation analysis. The circuit model can be used to derive the detailed transfer functions of multiple-VSC systems under different types of disturbances, and it is applicable to a variety of VSCs. Based on this model, the torque-frequency characteristics of multiple-VSC systems can be analyzed and designed by the circuit theory, which provides a new idea for the analysis of VSC dynamic.