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LOAD SHEDDING SCHEMES FOR ISLANDING DISTRIBUTION NETWORK OPERATION

One case of contingency or unplanned power outage occurs in the event of large mismatch between the power demand and the power generated. During overloads in islanded networks, the load curtailment applied to interruptible loads is often the only solution to keep them in operation. The loads participating in load shedding schemes experience minimal discomfort. This work proposes an approach to the load shedding schemes that can be employed in islanding distribution networks to guarantee the correct electrical system operation. This new proposed methodology includes the average and the priority shedding schemes and is based on a corrective load shedding optimizer (CLSO) algorithm. The CLSO evaluates and compares the network dynamic responses with the network frequency and voltage stability criteria for each distributed generation to optimize the amount of load shedding requirements. This work presents an in-depth investigation of the operation and robustness of the proposed method under various case studies on a typical IEEE distribution network. The results are then analysed and discussed.