Synchronization of Measurements of Power System Harmonics by Means of the Global Positioning System

Ilir F. Progri and William R. Michalson

Abstract:	It is known that assessment of Harmonic Pollution for balanced 3-phase Electric Power Systems can be obtained by attributing a distinctive equity of Harmonic Pollution to each Non-Linear Load despite the nonlinear nature of the Cost of Polluting Effect function. It is also known that this assessment of Harmonic Pollution among Non-Linear Loads requires synchronized and simultaneous measurements of the current flowing through each Non- Linear Load towards the bus where each Non-Linear Load is connected. Therefore we provide feasibility performance results and recommend that these current measurements must be performed (i) with respect to a common reference bus and for every half cycle and (ii) unsynchronized in time by not more than 5 µs (one sigma) to achieve a performance error closer to 0 %. Therefore, the Global Positioning System (GPS) is suggested as the synchronization means for power harmonic measurements due to its worldwide coverage and its synchronization accuracy about 50 times higher than the required measurement accuracy.
Published in:	Proceedings of the 58th Annual Meeting of The Institute of Navigation and CIGTF 21st Guidance Test Symposium (2002) June 24 - 26, 2002 Hyatt Regency Hotel Albuquerque, NM
Pages:	372 - 382
Cite this article:	Progri, Ilir F., Michalson, William R., "Synchronization of Measurements of Power System Harmonics by Means of the Global Positioning System," Proceedings of the 58th Annual Meeting of The Institute of Navigation and CIGTF 21st Guidance Test Symposium (2002), Albuquerque, NM, June 2002, pp. 372-382.
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