Project Description
The Open Source SynchroPhasor PMUs Project provides resources that enable you to build your own SynchroPhasor measuring sensors for use with the openPDC project, research, development, or electric grid observation.

Open Source SynchroPhasor PMU Project


GridTrak - Open Source PMU (GTosPMU)

How GridTrak Open Source PMU (GTosPMU) Works:

The GridTrak PMU is a hardware sensor designed to measure and transmit AC SynchroPhasor Frequency, Phase Angle, and Magnitude digitally by:

The GridTrak concept filters out the original wave form, harmonics, and distortion by the square wave conversion of the analog input signal to a digital signal. If you need to measure or observe wave form distortion or harmonics, this is not the PMU for the job.

Photo - GridTrak Model A, Rev 9.5 kit

Operational Open Source SynchroPhasor PMU with GPS Integration.

 

 

 

Photo - Testing a GridTrak Model A PMU with Garmin GPS 15xL-W. 

A bypass capacitor (upper right) is added to the PPS to reduce transient false signals.

Two serial port connections are shown.  A completed Model A PMU will only require 1 serial port connection for operation, however, the second serial port remains available for direct PC to GPS connection for development and diagnostics. 


OpenPMU - www.openpmu.org  and  OpenPMU on CodePlex

How OpenPMU works:

OpenPMU is essentially hardware agnostic, being able to acquire waveform data via:

The waveform sample data is read by PC in the Python development environment.  Python provides a library of functions and tools similar to MATLAB.  The estimated Synchrophasors can then be transmitted onwards in either plain text or IEEE C37.118 format.  Synchrophasors can be stored in a historian system, e.g. Pi Server.


Open Source PMUs Compared