A method for improving the stability of vertical flow-free microgrid based on the Nudibranch optimization algorithm

Abstract

The present invention belongs to the field of new energy distributed power generation, and specifically discloses a method for improving the stability of a vertical flow microgrid without a bottom flow based on a Nutcracker optimization algorithm. First, a small signal model of a vertical flow microgrid system without a bottom flow is established, and the coefficient matrix of the system is obtained. Then, the eigenvalue of the coefficient matrix is ​​calculated to obtain the dominant mode of the system and the parameters to be optimized. Then, the objective function of the Nutcracker optimization algorithm is set, and various parameters required for algorithm iteration are preset. Finally, the algorithm is iteratively updated to optimize the parameters, so that the dominant mode of the system moves away from the imaginary axis to achieve stability improvement. The present invention uses the Nutcracker optimization algorithm to iteratively optimize the system parameters, and the optimal solution of the parameters obtained effectively improves the system stability margin and achieves stability improvement of the DC microgrid.

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