Abstract:
This paper presents a simple yet effective phasor
estimation scheme, which is compliant with the protection class
performance of Phasor Measurement Units (PMUs). The proposed scheme is comprised of three main steps, viz., i) realtime frequency estimation using Goertzel-Zero Crossing Detector
(G-ZCD), ii) reference signal generation, and iii) fourth order
Adaptive IIR Notch Filter (ANF) based phasor estimation. The
proposed estimator accurately estimates the signal phasors within
half a cycle of the power system frequency, and hence is suitable
for P-Class PMUs development. The effectiveness of the proposed
scheme is checked on different test scenarios, as per the IEEE
C37.118.1a-2014 standards, confirming the potentiality of the
proposed estimator to detect the possible presence of static and
dynamic conditions in the signal. The validation of proposed
algorithm with Real Time Digital Simulation (RTDS) data for the
fault scenario in the IEEE 13 node distribution feeder integrated
with Photo Voltaic (PV), is also presented.
