As the important power interfaces connecting renewable energy and power grid, inverters are widely used in the novel power systems. It is urgent to establish the dynamic models of grid-tied inverters to analyze the transient behavior of grid-tied system before actual grid connection. In order to make up for the defects that physical mechanism modeling methods and conventional data-driven modeling methods for power electronic converters (PECs), this paper integrates differential algebraic equations (DAEs) into neural networks, i.e. formulating the differential algebraic neural networks (DANNs), to capture the high-dimensional nonlinear dynamic characteristics of grid-tied inverters. By comparing the transient behavior of grid-tied inverters based on actual simulation devices and dynamic models based on DANNs, it is proved that the proposed modeling method can capture the dynamic characteristics of grid-tied inverters with considerable accuracy and generalization under different grid-tied conditions and external interferences.

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Differential Algebraic Neural Networks Based Transient Behavior Prediction of Single-Phase Grid-Tied Inverters

  • Canjun Yuan,
  • Zhicong Huang

摘要

As the important power interfaces connecting renewable energy and power grid, inverters are widely used in the novel power systems. It is urgent to establish the dynamic models of grid-tied inverters to analyze the transient behavior of grid-tied system before actual grid connection. In order to make up for the defects that physical mechanism modeling methods and conventional data-driven modeling methods for power electronic converters (PECs), this paper integrates differential algebraic equations (DAEs) into neural networks, i.e. formulating the differential algebraic neural networks (DANNs), to capture the high-dimensional nonlinear dynamic characteristics of grid-tied inverters. By comparing the transient behavior of grid-tied inverters based on actual simulation devices and dynamic models based on DANNs, it is proved that the proposed modeling method can capture the dynamic characteristics of grid-tied inverters with considerable accuracy and generalization under different grid-tied conditions and external interferences.