Under-frequency load shedding scheme design based on cost-benefit analysis

Abstract

The spinning reserve and under-frequency load shedding schemes are designed to cater for the possible generation deficiencies in power systems caused by load pickup or generation loss so as to maintain the system frequency within a pre-defined operating range. A larger amount of spinning reserve will incur higher capital and operating costs but it can reduce the amount and probability of load shedding. To optimize the spinning reserve and the load shedding requirements, a cost-benefit analysis approach is adopted in the design and selection of spinning reserve and load shedding scheme. By quantifying the impacts of load shedding and the cost of spinning reserve as the "total cost", the spinning reserve and under-frequency load shedding requirements are optimized.