考虑储能的交直流混合配电网无功电压分布式优化调控OA北大核心

The integration of large-scale distributed power sources increases the voltage fluctuation in the AC/DC hybrid distribution network.While devices such as photovoltaic inverters and voltage source converters(VSC)can be utilized for reactive power and voltage control,energy storage systems(ESS)can play a role in peak shaving and valley filling,alleviating the risk of voltage fluctuation and violation.Therefore,this paper proposes a distributed optimal control method for reactive power and voltage in the AC/DC hybrid distribution network,considering ESS.Firstly,it analyzes the reactive power and voltage characteristics of photovoltaic inverters and VSCs,and the charging and discharging characteristics of ESS.An optimal reactive power and voltage optimization model for the AC/DC hybrid distribution network with the objective function of minimizing node voltage deviation,photovoltaic energy reduction,and network losses is presented.Then,the second-order cone relaxation technique is used to transform the model into a convex optimization model.Considering the problem of poor information privacy in centralized optimization methods,a distributed reactive power and voltage control framework based on the alternating direction method of multipliers(ADMM)is constructed.Based on the varying penalty parameter method,an accelerated ADMM method is further proposed to solve the model.Finally,case studies are conducted on the modified IEEE 33-node and IEEE 85-node systems to verify the rationality and effectiveness of the proposed distributed optimal control method for reactive power and voltage.