Remote power system harmonics measurement and monitor via the Internet

Traditional methods to measure power system harmonics employ either the power harmonic analyser or the software package such as Matlab. They, however, usually have limited capability in the Internet connection and/or graphical interface. In this paper, a PC-based virtual instrument (VI) that can carry out a remote measurement and monitor using Lab VIEW and the microprocessor (Intel 8051) for power system harmonics is proposed. The history of total harmonic distortion (THD) in the waveform signal can be also recorded and tracked in the database.