About The Project

   "We choose to do these things, not because they are easy,
    but because they are hard!"
        ~ John F Kennedy
    (Elliott's Hill Wind Farm, Northern Ireland)

What is OpenPMU?

The OpenPMU project is a suite of tools to help researchers create new power system technologies.  The project was originally founded at Queen's University Belfast, UK, and subsequently joined by the SmarTS Lab at KTH Stockholm, Sweden.
Phasor Measurement Unit (PMU) technology has become a mainstream tool of the power systems engineer.  PMUs allow all manner of interesting phenomena to be analysed, from transmission system faults to power oscillations induced by wind farms.  You can read about the fundamentals of PMU technology here.

Many PMUs on the market are difficult to use, and commercial vendors are reluctant to tell you what's inside the box.  For research and analysis, it's important to understand in depth how the instruments that produce your data operate.

The OpenPMU project is concerned with the advancement of Phasor Measurement Unit technology for the purposes of academic research.  Our devices and protocols are transparent, flexible and intuitive to use. 

Our goal is to improve PMU technology through application of modern technologies from multiple disciplines throughout electrical engineering, electronics and computing.  We believe that research labs should avoid 'reinventing the wheel'; we should share our tools, collaborate and break new ground together.

We use open source so as to share new developments fairly, and allow the technology to progress.  See some of our Case Studies.


"Anyone who has lost track of time when using a computer knows the propensity to dream, the urge to make dreams come true and the tendency to miss lunch."
    ~ Sir Tim Berners-Lee
OpenPMU was open sourced because it is felt that this is the fairest way to share the intellectual property generated in the project. Since OpenPMU is run and maintained by universities, we aim to create and support an environment in which different researchers and educators can pool their resources.

We want you to use and distribute these materials, but operating a project such as this is expensive in terms of time and money.  So please give credit to the project and the authors, especially by citing our papers in your work.
Licensing open source hardware is a difficult task.  For the avoidance of doubt, materials and drawings relating to OpenPMU hardware designs remain the copyright of their authors unless explicitly stated otherwise.
Software elements are licensed according to the license file provided with the code.  Any of the authors' OpenPMU software provided on this site, absent of a license file, should be considered to carry the BSD license.
You must always acknowledge the OpenPMU project in any work derived from it.

If you're still unsure, drop us a line.  :)

Project Principles

The OpenPMU Project aspires to follow the principles of the GPL, namely that:
  • The freedom to build the hardware and run the program.
  • The freedom to study how the hardware / program works, and change it as you wish.
  • The freedom to redistribute copies so you can help your neighbour.
  • The freedom to distribute copies of your modified versions to others.
That being said, you must check the license file of any materials you download and remember to follow its instructions and acknowledge the project and its authors.


Interested in our work?  Got something to contribute?  Get in touch with us or message us on our Facebook page and we look forward to working with you!  :)

Note to Students

If your supervisor sent you to this site, there is a fair chance that they've read it.  Don't copy and paste!  :D

The OpenPMU project name has a capital 'O'.  :)