A Very Short - Term Load forecasting using Kalman filter for Load Frequency Control with Economic Load Dispatch

Abstract

In this paper we have proposed a control technique for the automatic generation control of multi generating power unit of the interconnected power system. This technique established the relationship between the economic load dispatch and load forecasting mechanism to the classical concepts of the load frequency control (LFC). The LFC system monitors to keep the power system frequency at nominal value, generator output according to the load demand and net interchange scheduled tie line power flows within prescribed limit among the different control area of the power system. Due to relatively fast area load demand fluctuations and accordingly slow response of instantaneous estimate of area control error (ACE), we need some load forecasting technique for better dynamic system response as well as improved & effective load frequency control to the power system. Load prediction technique has been accomplished using the klaman filter prediction recursive algorithms and a bank of hourly predicted load data is obtained and then the concepts of 5 -minute look ahead forecasting technique is applied and finally total load is shared among the different generating units according to the calculation of economic load dispatch via participation factor's. Results and Discussion section of this paper of simulated interconnected system's graphs support this new technique wisely.