Modular Instrumentation for Phasor Measurement Unit (PMU) Testing

A phasor measurement unit (PMU) installed in a power system is a device which usually serves for its protection, monitoring and control. Accordingly, such devices are required to satisfy special qualifications on synchronization, calibration and testing before the installation in power system. In this paper, a testing system based on a modular and versatile electronic instrumentation as well as a time and frequency synchronization platform is presented. Relevant measurements have been conducted with a developed testing system taken as a reference, and total vector error (TVE) is calculated for a commercial calibrator. Obtained results of calculated TVEs for the tested PMU at 50 Hz are well below the maximum limit of 1 % stipulated by the relevant standard.