Research and Analysis on Management Methods of Line Loss for High Permeability Distributed Photovoltaic Access Transformer District

Aiming at the problem of excessive line loss in high permeability distributed photovoltaic access transformer district, we proposed a line loss control method for distributed photovoltaic access transformer district based on the krill swarm algorithm. Firstly, the minimum objective function of active power loss and voltage offset at the node of photovoltaic access transformer district area is constructed, and the optimal solution of the objective function is obtained by using the improved krill swarm algorithm. Secondly, a high permeability distributed photovoltaic transformer district lumped total equivalent analysis model is established, besides, a coordinated control method for total active and reactive power output of photovoltaic that meets the optimal objective function is proposed. On the above basis, the cosine decreasing step evolution method is used to further optimize the improved krill swarm algorithm, and the optimal power allocation values for each distributed photovoltaic system in the transformer district were also obtained. Finally, a typical high permeability distributed photovoltaic transformer district area is selected for simulation and comparative analysis,proving that this line loss control method can achieve refined management of line losses in photovoltaic transformer district.