A Novel Optimization Model for Harmonic Mitigation Based on Residual Capacity of Photovoltaic Inverters

In the distribution network, the existence of harmonic sources will lead to the warping of current and voltage waveform, affecting the stability of power system and the correct functioning of equipment. In this paper, a novel optimization model for harmonic mitigation is proposed, which utilizes residual capacity of photovoltaic inverters after active grid connection to generate harmonic compensation currents. The model is solved by particle swarm optimization algorithm. The simulation results prove that optimization model proposed in this paper shows great robustness and effectiveness, which is able to achieve harmonic mitigation at all nodes when facing different harmonic exceedances and can reduce the average value of total harmonic distortion of voltage by up to 11.59%. This also provides theoretical support for practical engineering applications.