METHOD FOR GENERATION RESCHEDULING AND LOAD SHEDDING TO ALLEVIATE LINE OVERLOADS USING LOCAL OPTIMIZATION

The alleviation of emergency transmission line overload is a critical problem in power system operation. A method is presented for generatio n rescheduling and load shedding to elleviate line overloads, with the help of a local optimisation concept. The method developed is superio r to existing methods, as the new secure operating point is obtained f or all line overload cases efficiently, and a significantly smaller am ount of load shedding is required. It is an aid to the load dispatcher and will find extensive applications in operational planning, securit y studies and the reliability evaluation of power systems. Test result s for the 14-bus, 118-bus IEEE test systems, 6-bus and 26-bus SPC syst ems, and the 64-bus model of the North-West power system of India are presented to show the effectiveness of the method.