| Popis: |
This work focuses on the protection of distributed generation (DG) integrated microgrid system by using Kernel Extreme Learning Machine (KELM) based Hilbert–Huang Transform (HHT). Firstly, the current signals collected from buses are processed through Empirical Mode Decomposition (EMD) to obtain the Intrinsic Mode Functions (IMFs). Subsequently, the most significant IMF is used for the calculation of spectral energy and differential energy of both the buses. Subsequently, the most relevant features for protection aspects like differential energy levels, mean, median, entropy, and standard deviation are recorded for all fault types in a grid-connected environment with both radial and looped structures on IEC microgrid model test system. Further, the Gaussian kernel is used with 70% data points for the training of the neural network and optimization of the random matrix. The optimized values are then analyzed for validation and the efficiency quotient. The accuracy, security, and dependability values clearly illustrate the superiority of this optimized KELM architecture for the detection of a fault in a grid-connected microgrid system. |
