Optimization Strategy for Synchronous Voltage Regulation and Loss Reduction in Multi-Substation Areas of Active Distribution Networks Based on Double Rotating Phase Shift Transformers
In order to solve the crossing problem of voltage exceeding limits in the distribution network caused by a high proportion of renewable energy intergration,as well as the difficulty of balancing bidirectional voltage regulation and loss reduction optimization with existing voltage regulation methods,a series-connected double rotating phase shift transformer(DRPST)regulator based on the principle of phase synthesis is proposed,which has the characteristics of bidirectional voltage regulation,high reliability and low cost.Firstly,the topology,working principle and equivalent circuit of DRPST are introduced and its simplified circuit model is established.On this basis,the causes of voltage exceeding limits are analyzed and the active distribution network model containing DRPST is constructed.Secondly,a real-time rolling two-layer optimization strategy based on DRPST is proposed.The inner-layer model is solved by multi-objective particle swarm algorithm with the objective of minimizing voltage deviation and line loss,and the optimal compromise solution of the Pareto solution set of the inner-layer model is determined by the fuzzy affiliation function method.According to the optimal compromise solution of the inner-layer model,the outer-layer model achieves undifferentiated control of the DRPST output rotor angle using the double-closed-loop PI regulation.Finally,simulation analysis is carried out by MATLAB/Simulink to verify the correctness and effectiveness of the proposed topology and control method.
double rotating phase shift transformervoltage regulationdouble-layer planningactive distribution network
万方数据
维普
