Definition
Power quality describes how closely the electricity delivered to a load matches an ideal, undistorted sine wave at the correct voltage and frequency. For a hashcenter or home mining setup, poor power quality means the supply waveform is sagging, swelling, distorted, or interrupted in ways that stress power supplies and shorten hardware life. The umbrella term covers everything from momentary voltage dips to harmonic distortion, transients, and frequency drift.
Why it matters for mining hardware
ASIC power supplies are switch-mode units that pull current in sharp pulses. They tolerate a band of input conditions, but disturbances outside that band trigger shutdowns, derating, or premature capacitor and component wear. A facility that draws hundreds of kilowatts of nonlinear load also degrades its own power quality, feeding distortion back onto the shared wiring and affecting neighboring equipment.
How power quality is measured
IEEE 1159 defines the standard categories of electromagnetic phenomena used to classify power-quality events: sags and swells, interruptions, transients, harmonic distortion, voltage fluctuation (flicker), and frequency variation. Each is characterized by magnitude and duration, which is why a single power-quality monitor logs many different parameters rather than just a voltage number.
Understanding these categories helps operators size conductors, specify protection, and diagnose nuisance faults. Related entries explain individual disturbances such as voltage sag, harmonics, and the transient voltage spike.
In Simple Terms
Power quality describes how closely the electricity delivered to a load matches an ideal, undistorted sine wave at the correct voltage and frequency. For a…