Two Meter 3-phase Metrology
One aspect of 3-phase power metrology that’s not very well-known is that it’s possible to fully quantify the system with just 2 voltage/current measurements. This is commonly referred to as a, “corner grounded delta” configuration or sometimes as the “two meter method.” One day I decided to see if I could derive this from first principles on my white board and got lucky on the first try. This is a picture of my derivation which my colleagues jokingly called, “Yaney’s Conjecture.” [read full article]
Voltage Induced in the Rogowski Coil due to a Threading Current
This is a short derivation of the Rogowski equation written with my colleague Dr. Kartikeya Tripathi back in 2010. The first time a new user observes the remarkable properties of the Rogowski geometry (first published by Rogowski and Steinhaus in 1912) to create a current measuring aperture with a flat spatial response and also to reject stray magnetic fields form non-threading currents it looks magical. Like all things magical, it is not. [read full article]