Inverter imbalance

Inverter imbalance refers to the phenomenon where the three-phase voltage or current output by the inverter is inconsistent in terms of amplitude, phase, or frequency. This imbalance can lead to a decrease in system efficiency, overheating of equipment, and even grid interference, especially in grid-connected energy storage systems and microgrids, where it is necessary to monitor and control it closely.
Common manifestations include: Unequal amplitude of three-phase output voltage (e.g., Phase A 230 V, Phase B 215 V, Phase C 225 V), uneven current in three phases (caused by uneven load), phase angle deviation leading to the phenomenon of ‘false three-phase’, and harmonic imbalance affecting power factor and power quality.