Voltage partial compensation strategy based on SA-PSO algorithm for hybrid distributed transformers

Abstract

Hybrid distributed transformers(HDT) play a good role in solving the problem of voltage fluctuation and asymmetry on the low-voltage side. However, when the load voltage fluctuates, if the load voltage is fully compensated to meet the condition that the load voltage is equal to the rated voltage, HDT requires a larger compensation capacity and higher design cost. The output capacity of HDT is affected by multiple degrees of freedom, and the optimal output capacity cannot be obtained according to the traditional analytical formula. In order to obtain the optimal output capacity of HDT, this paper proposes a HDT voltage partial compensation strategy based on the SA-PSO algorithm. By analysing the relationship between load and voltage regulation adjustment, the optimal working point is found by the SA-PSO optimization algorithm. The proposed compensation strategy reduces the compensation capacity required by HDT, thereby reducing the design cost. The simulation results show the effectiveness of the proposed voltage partial compensation strategy.