The Alleviation Countermeasures of Line Overloads Due To a Contingency Occured in Power System

전력계통(電力系統)의 상정(想定)사고(事故)에 따른 선로(線路)의 과부하(過負荷) 해소(解消) 대책(對策)

This paper presents a new algorithm for the countermeasure to alleviate without shedding system loads the line overloads due to contingency in power system. This method for relieving by line switching is based on obtaining the line outage distribution factors - the linear sensitivity factors, which give the amount of change in the power flow of each line due to the removal of same other line in the power system. These factors are made up of the elements of Bus Reactance Matrix and branch reactances. In this paper a fast algorithm and program is presented for obtaining only the required Bus Reactance elements which corresponds to a non - zero elements of Bus Admittance Matrix and elements of columns which correspond to two terminal Buses of the overloaded(monitored) line. The proposed algorithm has been validated in tests on the 6 busbar test system