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Improving frequency measurements: switching loads

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3 Author(s)
M. A. Donolo ; Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; V. A. Centeno ; Yilu Liu

Frequency recording units (FRUs), designed to measure power systems' frequency at low voltage, are affected by the connection of large loads causing sudden phase shifts and magnitude changes in the voltage. These phase shifts introduce spikes in the frequency measured by FRUs. In this paper, we propose an algorithm to detect the phase shifts and to produce an accurate frequency estimation regardless of load changes

Published in:

IEEE Transactions on Power Delivery  (Volume:21 ,  Issue: 4 )