Collaborative Control Strategy of Power Quality Based on Residual Capacity of Photovoltaic Inverter

With the large-scale distributed PV connected to grid, random and intermittent nature of output, non-linearity inverter, as well low daytime base-load back feeding cause outstanding power quality problems such overvoltage, three-phase unbalance, high harmonic content at end supply system, which seriously affects safe stable operation grid efficiency. Based on residual capacity this paper investigates a cooperative control strategy that integrates active filter, reactive compensation, inverter functions achieve comprehensive management without adding additional hardware equipment. The validation results show strongly improves quality, security, stability, This indicates significant economic benefits.