Analyzing Subsynchronous Resonance Using Component Connection Method

This paper presents a methodology for the state space matrix formulation of a multi-machine power system using the component connection method (CCM). The motivation is the development of a computational framework for the analysis of subsynchronous resonances (SSR) in multi-machine meshed networks possibly including VSC-HVDC systems. An alternative modeling approach of the turbine, as well as the generator unit modeling, is presented. The electrical transmission network dynamics is included, and a modified algorithm for deriving the network state equations is described. All modeled components are connected using the interconnection matrices defined by CCM. The methodology is validated against known benchmark models for computer simulation of subsynchronous resonances. The proposed methodology provides a modular and computationally-efficient approach for the calculation of the system state matrix, which is necessary for systematic analysis of SSR.