Performance Analysis of Power Quality Monitoring System

The presence of power quality (PQ) problem in power supply system can cause malfunction of the modern high technology devices and these faults will bring about immense financial losses in the commercial and industrial sectors. Most of the PQ instruments available in the market are unable to classify PQ events, thus power quality monitoring system (PQMS) is proposed to solve that problem. The validation of PQMS performance in measurements and PQ detection through numerous laboratory experiments is feasible by using Fluke 43B power quality analyser (PQA) as the reference tool. The PQ measurements data collection inclusive of voltage, current, real power, reactive power, apparent power and power factor has prompted the measurement accuracy assessments. The voltage sag and harmonic distortion are induced for testing the PQMS ability in identifying the signal disturbances. The effectiveness of PQMS is emphasized through the comparisons between the signals obtained and absolute percent error (APE) of the measurements with the results of PQA. In short, the performance of PQMS in signal detection and measurement is verified.