Transient Modeling and Simulation of Grid-forming Inverter-Driven by Dispatchable Virtual Oscillator
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更新:2022-05-20 17:22:45
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摘要
Traditional transient simulation has a conflict between high computation accuracy and short computation time to solve nonlinear differential equations. In this paper, a three-phase nonlinear transient model of a dispatchable virtual oscillator-based grid-forming inverter is developed. The modeling method makes use of the amplitude-phase angle decoupled control equation within each time-step and enables integration with a three-phase distribution network solver based on Matlab platform. The proposed nonlinear transient model and the numerical iteration model are validated against simulation results of the Simulink model in a stand-alone system. Further, the two models are compared in a modified islanded IEEE-13 node distribution system. Comparison of the simulation results reflects the significant speed advantage of the proposed nonlinear transient model without loss of accuracy. The results also demonstrate that the dispatchable virtual oscillator control can maintain the system voltage and frequency stability in isolated distribution systems with multiple renewable sources.
关键词
Dispatchable virtual oscillator control;grid-forming inverter;nonlinear transient model;distribution network;islanded system
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