M Class Synchrophasor Compliance for Real-time Monitoring of Smart Power Systems

摘要

The synchrophasor is an intelligent electronic devices, which normally provides synchronized voltage phasor, current phasor, frequency and rate of change of frequency measurements. The existing power system grid is well operated and controlled by well-known supervisory control and data acquisition (SCADA) system. The drawbacks of the SCADA systems are poor visualization, not providing accurate state estimate, lack of time stamping and poor situational awareness. Hence, in recent years, besides the existing SCADA system, synchrophasors are used in real-time application for smart power system network toward various fields like, wide area frequency monitoring, voltage stability monitoring, state estimation, renewable energy monitoring-wind and solar, monitoring HVDC systems, congestion management, protection and control applications, islanding and anti-islanding detection, wide area monitoring, etc. The roles of synchrophasors are very much worthwhile to monitor the power system grid critical parameters in order to know the normal, alert and emergency situations in control center. This paper presents the steady-state and transient compliance of synchrophasors under IEC/IEEE 60255-118-1:2018. The power system standard is mainly for synchronized phasor measurement and outlines a synchronized voltage and current phasors, frequency and its derivative, time tag and synchronization requirements for all measurements. The synchrophasors test bed consists of highly precision three-phase voltage and current signals, system timing unit, GPS receiver, server PC, electrical power standards, PMUCal software and phasor measurement units (PMUs) under test. Three PMU from different makes were tested individually in order to prove the compliance as per the state of the art of international standard. These PMUs information’s are very much useful for smart transmission utilities and control center in order to monitor and control of power grid. The synchrophasors test results were analyzed, and it was encouraging.