Study of Identification for the Inertia Constant in a Small Power System for LFC

Abstract

This paper has tried the identification for the inertia constant in a small power system, for the betterment of the LFC control characteristic. The power demand estimation method was used for the method of identifying an inertia constant power system. Until now, the method that used as an output set-point control by the power demand estimation is improved to the identification method. The power demand estimation method is using the frequency variation, the tie line power flow deviation, the output deviation of power plant, the inertia coefficient and damping coefficient of power system. In this paper, the actual electric power demand, the output of power plant, etc. was observed and the inertia coefficient is calculated using this estimation method. Then, the inertia constant and the damping constant are not observed.In this paper, the inertia coefficient of the system of 2000kW small-scale system was calculated.