Before revision:  In this paper, we present a moment matching method based on the extended Krylov subspace combined with the superposition property that can handle large input models and generate more accurate and efficient reduced-order models for circuit simulation methods. The accuracy and efficiency of the proposed method is verified using industrial power grid benchmarks .
After revision:  In this paper, we present a moment matching method based on the extended Krylov subspace combined with the superposition property that can handle large input models and generate more accurate and efficient reduced-order models for circuit simulation . Experimental results on industrial IBM power grids demonstrate that our method achieves an error reduction up to 83.69\% over a standard Krylov subspace method .