Power-System Modeling - A Transfer Matrix Approach

With increasing utilization of high power-electronic converters, power-system modeling and stability analysis become ever more challenging. This paper introduces a transfer-matrix-based modeling method for power-system stability analysis. The method has previously been applied for studying the dynamic interaction between voltage-source converters and ac systems. In this paper, the modeling method is used to analyze some conventional power-system stability issues. It is demonstrated that the proposed modeling method gives a new interpretation of conventional power-system stability from a feedback-control point of view. The poles and zeros of the so-called Jacobian transfer matrix (JTM) are useful for understanding the properties of ac/dc systems.