PGMOR: An Efficient Model Order Reduction Method for Power Grids

Simulation of power girds has become increasingly computationally expensive. In this paper, we propose a Model Order Reduction (MOR) method for power grid circuits by extending the existing Aggregation-based MOR (AMOR) method. In the proposed method, besides resistors and capacitors, current sources are also aggregated to improve MOR efficiency. Moreover, pre-partition and parallelization techniques are employed to decrease the reduction time. Numerical results demonstrate that the reduced-order models can achieve up to 18× simulation speed-up over the original circuits without much loss of accuracy.