Adaptive load shedding based on combined frequency and voltage stability assessment using synchrophasor measurements

作者：Tang Junjie; Liu Junqi; Ponci Ferdinanda; Monti Antonello

来源：IEEE Transactions on Power Systems, 2013, 28(2): 2035-2047.

DOI：10.1109/TPWRS.2013.2241794

• Adaptive load shedding schemes
• Phasor measurement unit (PMUs)
• Power system stability
• Synchrophasors
• Under voltage load shedding
• Underfrequency load-shedding

Under frequency load shedding (UFLS) and under voltage load shedding (UVLS) are attracting more attention, as large disturbances occurmore frequently than in the past. Usually, these two schemes work independently from each other, and are not designed in an integrated way to exploit their combined effect on load shedding. Besides, reactive power is seldom considered in the load shedding process. To fill this gap, we propose in this paper a new centralized, adaptive load shedding algorithm, which uses both voltage and frequency information provided by phasor measurement units (PMUs). The main contribution of the new method is the consideration of reactive power together with active power in the load shedding strategy. Therefore, this method addresses the combined voltage and frequency stability issues better than the independent approaches. The new method is tested on the IEEE 39-Bus system, in order to compare it with other methods. Simulation results show that, after large disturbance, this method can bring the system back to a new stable steady state that is better from the point of view of frequency and voltage stability, and loadability.

• 出版日期2013