# Grid Analyzer multi-domains measurement

Grid Analyzer..... Lessons learned: synchrophasor domain vs. time domain or frequency domain Harold Kirkham – I’m paraphrasing – pointed out to me that synchrophasor measurements answer the question “if – IF! – the underlying signal were a cosine wave, what would its amplitude be, and what would its phase angle be relative to a timing pulse?”

THIS IS IMPORTANT.

1. On distribution grids, the underlying signal is NOT a cosine wave. a. In steady state, both voltages and currents have significant harmonics. b. During any interesting event, the voltages and currents are rapidly changing. 2. For harmonics, you’re often better off measuring in the frequency domain, not the synchrophasor domain. 3. For rapidly changing voltages and currents, you’re often better off measuring in the time domain, not the synchrophasor domain. 4. Maybe we should reserve the synchrophasor domain for quasi-steady-state fundamental analysis: grid control-loop stability, grid impedances, and the like?

*Credit to: PSL & NASPI*

Applications:

Harmonics - Transient - Symmetrical components - EN50160 & standards - Supra harmonics 150 kHz & plc - Grid impedance - Wind & photovoltaic - EV charging station - Railway - Energy measurements - System dynamics - PMU & ROCOF - WAMS - Transformer efficiency - Motor efficiency - PV inverter efficiency - Other electromechanical machines - AC/DC circuit - Short circuit test, and etc.