WIDE AREA PROTECTION FOR POWER TRANSMISSION LINES

Abstract

Stability and security of the electric power grid is becoming more challenging over the past few decades because the growing size of the power grid [1]. Transmission lines are important components on power system, which links generation plants to the end users. Transmission lines exposed to different types of faults, which are unpredictable and random [2]. Fault causes instability, and causes short to long term power outages.

1.2. Synchronized Phasor Measurement Synchronized phasor measurement is one of the most important devices in the future of power system [3]. Synchronized phasor measurement also referred to synchrophasors. It measures the electrical waves on a power system to determine the health of the system. One of the most important functions of the PMU is that the measurements are time-tags. Global Positioning System (GPS) is the generally accepted time source for its accuracy and universal availability at all times. The time stamped associated with the phasor data create a coherent picture of the electric power grid [4]. Wide area protection (WAP) can be considered as a most reliable method to protect all the system components from faults [5]. Main objective of wide area protection is to identify and isolate the faulty section. The traditional protection system collects only local information. So, it lacks the global view of the whole system [6].