Development of a Low-cost Phasor Measurement Unit



Journal Title

Journal ISSN

Volume Title



ABSTRACT The electric power grid is a very large and complex system that is a necessity in todays society. Traditional grid monitoring systems such as SCADA are being replaced by the Phasor Measurements Units due to their superior capabilities such as real-time and synchronize measurements. PMUs have many applications from gird protection to grid control, the down side however is that commercial PMUs have a high price tag staring at $2,400 and can go up to $10,000 USD. This large price can make it difficult to install a large number of PMUs to achieve full observability in a power grid. This thesis discusses the development of a low-cost single phase voltage PMU. Including is part selection, circuit design and programing methods. The PMU developed has an estimated cost range of $800 to $1,000 USD which is significantly lower than other commercial available PMUs. The PMU developed was tested by comparing a single-phase voltage measurement with a commercial PMU. The comparison showed that the low-cost PMU closely followed that of the commercial PMU with low errors in RMS voltage, frequency and phase angle. These results validate the accuracy of the low-cost PMU and its ability to be an alternative solution to the higher priced commercial PMUs.

Embargo status: Restricted to TTU community only. To view, login with your eRaider (top right). Others may request the author grant access exception by clicking on the PDF link to the left.



Phasor measurement unit, PMU, Power systems, Synchrophasor