Starting Synchrophasor measurements in Egypt: A pilot project using fault recorders

Abstract

The analysis of the large systems blackouts during the last years have pointed out the need for the function of RealTime Wide Area Monitoring, Protection And Control (RT WAM PAC). Phasor Measurements (PM) has proved to be the vital source of data necessary for many applications in power system RT WAM PAC. The paper explains this new technology, the reasons behind its use and points out the role it plays in the overall view of RT WAM PAC. The recent applications of the Synchrophasors projects allover the world is highlighted. Generic and specific technical requirements for Synchrophasors Measurements are explained. The paper also illustrates, using actual recorded case from the fault recording system in the Egyptian Power Network, how the synchronized voltage phasors at different locations within the system, could be presented to the system operator during different operating states, using a software program designed specially for this purpose. A pilot project for PM in Egypt using the existing Disturbance Recorders is presented showing the benefits which could be gained from such a project.

Fault Location Based on Synchronized Measurements: A Comprehensive Survey

“…The potential uses of the subsecond GPS-synchronized phasor data collected from various locations within an electric power system promise endless benefits for the applications targeting reliable operation of electric power system [ 8 ]. Various PMU applications in power systems including fault location [ 9 – 15 ] have been reported. Merging of time correlated information from PMU, SCADA, and nonoperational data has also been suggested [ 16 ] to improve the effectiveness of alarm processing, accuracy of fault location, and ability to detect cascades.…”

Adaptive Under Frequency Load Shedding using PMU

“…It is The relation between the load to be shed and PO.L% measured noticed that, from the frequency behavior, the system frequency equals 49.3 Hz at time equals 3.6393 sec. The system time delay is considered as 200 msec [8]. By shedding different loads at time = 3.8393 sec, it is clear to us that: shedding the same over load power may be not enough to return the frequency to the rated value.…”

“…With the increased availability of sophisticated computer, communication and measurement technologies, more "intelligent" equipment can be used at the local level to improve the overall emergency response. [5][6][7][8] Wide area protection applications consist of two basic categories, local substation applications and applications at system or regional operation centers. It is advantageous to use the local intelligence and decision-power in the substation PMU to take coordinated corrective [or adaptive] actions to power system events while maintaining overall system control at the operations center [6].…”