Performance of three algorithms for frequency measurement under transient conditions

Power system frequency estimation using morphological prediction of Clarke components

“…(14)- (16), but the fundamental frequency changes subtly from 60 Hz to another value [17]. In all cases, it occurs at 0.5 s. For all analyzed cases of this type, the best performance was verified using MPCC technique.…”

“…Voltage signals with both frequency and amplitude damped variations are similar to those waveforms that occur when voltage controllers and speed regulators act in a synchronous generator [17]. In this way, signals for this case were generated using different parameters, according to the following equations:…”

“…(20) from 60 Hz to higher or lower values in an exponential form, according to Ref. [17]. For all analyzed cases, the exponential frequency variation starts at 0.5 s.…”

“…A load connection or disconnection in a power system can be seen as a sudden phase shift in the voltage signals [17]. In order to predict the MPCC during these situations, signals with sudden phase shifts ( Â) varying from −90 • to 90 • were generated according to Eqs.…”

Estimation of frequency, phase and amplitude of voltage using the continuous genetic algorithm

“…In this the three-phase voltages were converted into a complex signal, applying the αβ-transformation and the results were used in an adaptive filtering algorithm. Several other techniques have been proposed in literature for estimation of frequency, phase and amplitude of voltage [4][5][6][7][8][9][10][11][12][13]. In this paper an attempt is made to explain the possibility of application of the powerful tool of CGA for estimation of frequency, phase and amplitude of voltage.…”