Chirp-based impedance analyzer for live three-phase grids
This technology measures the electrical impedance of three-phase AC power systems by injecting a 'chirp' signal — a sweep across multiple frequencies simultaneously — directly into the grid and analyzing how the system responds. A compact hardware unit draws power from the grid itself to generate and inject these test signals, then converts the raw measurements into a coordinate system that makes the math tractable. The result is a fast, non-invasive snapshot of how a power system behaves electrically, which is essential for diagnosing stability problems, tuning inverter controls, or certifying that new equipment won't destabilize the grid. The method is faster and more informative than traditional single-frequency injection techniques.
What you could build
A portable or rack-mounted impedance analyzer for three-phase power systems, sold to utilities, inverter manufacturers, and grid interconnection testing labs that need to characterize grid impedance for stability analysis and equipment certification.
Who in Virginia should care
Virginia's dominance in data center power infrastructure and Dominion Energy's grid modernization programs create natural customers; defense contractors at Dahlgren or Langley working on shipboard or airborne power systems are also plausible.
Readiness: Prototype likely
Concept — described but not yet demonstrated. Lab validated — supported by experimental results in the patent. Prototype likely — the text describes a built, working embodiment.
Readiness is inferred from the patent text, not from a lab visit.
The record
- Inventors
- Jacob Verhulst, Mohamed Belkhayat, Zhiyu Shen, Marko Jaksic, Paolo Mattavelli, Dushan Boroyevich
- Granted
- April 11, 2017
- Status
- Granted patent
- Patent number
- 9618555
Ready to talk?
Virginia Tech Intellectual Properties handles licensing for this technology.
Prosim summaries are generated from public patent text and are not legal advice.