Validation of P Class Synchrophasors Under Dynamic System Conditions

A synchrophasor or Phasor Measurement Unit (PMU), uses measured voltage and current as input signals to estimate characteristics such as phase angle, frequency, magnitude, and rate of frequency change. Phasor estimation may become complicated due to distortion of these input signals from harmonics, noise, and state changes often brought on by changes in load, protection, and control actions. P class PMU is often designed for applications that need quick response time. To enhance the reliable performance of Synchrophasor for protection applications, the phasor estimation algorithms need to be verified for compliance with different reporting rates for the P class as per the latest standard IEC/IEEE 60255-118.1:2018. The stimuli of dynamic/transient conditions can be generated using the 6135A synchrophasor calibration system. Proper study and analysis of synchrophasors are necessary to avoid failure and blackouts in power systems. In this work, three synchrophasors were validated for the P class at a reporting rate of 50 frames per second under dynamic systems conditions. The outcome of the results was analysed and discussed for compliance which could be more useful for various improved power system protection applications.