PSO-based Power Allocation Optimization for Photovoltaic Grid-tie Inverters
When distributing the power of photovoltaic grid-tie inverter,the corresponding impedances of individual in-verters are different due to the influence of spatial-time position difference and external load difference,which gives rise to the reactive power of the inverter.Therefore a power distribution optimization method of photovoltaic grid-tie inverter based on particle swarm optimization algorithm was proposed.On the basis of calculating the relationship between inverter terminal voltage and line impedance,the reactive voltage droop characteristic curve of the inverter was obtained,and the power allocation objective function was constructed from the perspectives of droop coefficient and line impedance.After the particle swarm size was set according to the executable range of the operating parameters of the photovoltaic grid-tie in-verter,the optimal allocation result was determined by calculating the fitness value of the particle position and the objec-tive function.In the test results,the reactive power under the proposed method remained stable within 1210.0 var,at a relatively low level.
particle swarm optimizationPV grid-tie inverterpower allocation optimizationterminal voltagecharacteristic curve of reactive voltage droopobjective functionfitness value
万方数据
维普
