Synchronized Phasor Measurements with GPS Time Stamping using 64 Point DFT in PMU 
R.Alekya1, Ravi Ponnala2, Aleti Soumya3, B. Shiny Sucharitha4
1R.Alekya*, EEE Department, St.Martin’s Engineering College, Hyderabad, India.
2Ravi Ponnala, EEE Department, Vasavi Collegr of Engineering, Hyderabad, India.
3Aleti Soumya, EEE Department, St.Martin’s Engineering College, Hyderabad, India..
4B.Shiny Sucharitha, EEE Department, St.Martin’s Engineering College, Hyderabad, India..
Manuscript received on March 29, 2020. | Revised Manuscript received on April 25, 2020. | Manuscript published on April 30, 2020. | PP: 2435-2440 | Volume-9 Issue-4, April 2020. | Retrieval Number: D8065049420/2020©BEIESP | DOI: 10.35940/ijeat.D8065.049420
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper describes about the time synchronization of different locations voltage or current signals for accurate comparison of signals on single phasor graph, all the measured phasors are synchronized with Global Positioning System (GPS) time stamping. Day to day power demand increases very rapidly, to meet the growing demand of electrical energy new energy resources are required and manage them efficiently. For efficient allocation of sources there should be a good monitoring and fast control system. For better monitoring and control of the system accurately it requires “Wide Area Monitoring” of power system. In the wide area monitoring system collection of data from the power system should be at a faster level. The collection of data from the power system at faster level is possible by using “Phasor Measurement Units(PMUs)”. PMU collects the data at faster rate rates like 50-60 samples for cycle, this information is send to local Phasor Data Concentrator (PDC). Local phasor data concentrator collects the data from different PMUs which are located in different areas. This PDC helps to take the necessary action on power system. For synchronization, pulse per second(PPS) is taken from GPS module. From this 1PPS, 3200 pulses is generated for high accuracy of 64 point DFT of 50Hz signal using microcontroller. System frequency is calculated by using time period between the two consecutive raising edges or falling edges of square wave. This is in synchronous with the input sinusoidal signal.
Keywords: GPS, phase angle, PMU, 1PPS, magnitude, frequency.