Fast response detection of mean value of power system quantities
Shozo Takata, R. Ueda, E. Ohta, Hirotoyo Nakashima · IEEE Transactions on Power Apparatus and Systems · 1975
A fast response detecting method of mean value of power system quantities such as, voltage, current, power, torque angle and shaft speed deviation is proposed. The detected value, which is linearly proportional to the input signal, represents the mean value of each half cycle of the input signal that is held as a dc voltage as soon as that half cycle is over. The detection is stable against the random noise included in the signal, and does not have drooping characteristic.