A Method for Damping Controller Design Using Transfer Function Identification Technique and Robust Stability Degree Assignment Method

Abstract

This paper presents a method for power system damping controller design using a transfer function identification and robust stability degree assignment method.
The identification procedure used in the proposed method is based on an iterative scheme introduced by K. Steiglitz and L. E. McBride. Steiglitz-McBride's algorithm provides the low order linear system models of power systems without deriving linearized state space realization from physical modelling of the power systems. By combining robust stability degree assignment method with the Steiglitz-McBride's identification technique, power system damping controllers can be designed straightfowardly. The advantage of the proposed method is as follows,
• The damping controller can be designed easily even in the large scale and complicated power systems.
• Real power system dynamics can be taken in to account in the controller design procedures by using measured signals.
The proposed method is applied to measured signals in TEPCO real-time power system simulator as well as time domain digital simulation results. The present paper demonstrates the feasibility of synthesizing equivalent linear systems from measured data and designing effective controller using synthesized linear systems.