Multi-objective Operation Optimization of Distribution Network with DPVG High Permeability

The connection of distributed photovoltaic power generation (DPVG) to the distribution network will cause voltage fluctuations on the one hand, whereas, it can provide voltage support by using the remaining reactive power on the other hand, then reduce network losses, improve system security, and reduce investment in some reactive devices. This paper proposes a multi-objective operation optimization scheme for distribution network with DPVG high permeability. Firstly, based on the analytic hierarchy process, the comprehensive optimal evaluation index of photovoltaic operation at different times is proposed. Then the objective function of three indicators are established: the curtailment of photovoltaic power, the network loss, and the voltage deviation of the grid-connection node. The barebones multi-objective particle swarm optimizer (BB-MOPSO) with less control parameters is used to find a number of feasible optimization schemes for the DPVG access to distribution network considering suppression of voltage fluctuations, network loss and the curtailment of photovoltaic power. The optimal evaluation plan for the time period is determined by combining the comprehensive evaluation indicators of the analytic hierarchy process. Finally, take the case of the three DPVGs with large output fluctuations installed in the IEEE-33 distribution network end node as an example to verify the validity and rationality of the proposed model and method.