Interline Power Flow Controller Based Damping Controllers for Damping Low Frequency Oscillations

ABSTRACT: The effect of Interline Power Flow Controller (IPFC) on damping low frequency oscillations has implied in some papers, but has not investigated in details. This paper investigates the damping control function of an Interline Power Flow Controller installed in a power system. For this purpose, Single Machine-Infinite Bus model integrated with IPFC is used, and the linearized model is established. Using this model, Phillips-Heffron model of system for steady state digital simulations is derived. The common DC link in the IPFC configuration enables each inverter to transfer real power to another, so regulation of DC link voltage is an important issue in overall performance of the system. In this paper, a new method based on Genetic Algorithm (GA) is presented to regulate DC link voltage. In this method, GA and system objective function are adopted to choose best PI parameters for the linear controller of DC link of IPFC In this paper, numerical results with Matlab Simulink toolbox, which show the significant effect of IPFC on damping inter-area oscillations, are represented