Coordinated Optimal Dispatch for Transmission and Distribution Networks Considering Interactive Power Uncertainty and Flexible Load
The high proportion penetration of distributed renewable energy and active load response have deepened the coupling between the transmission and distribution network,which poses severe challenges to the safe and reliable opera-tion of the transmission and distribution networks.In order to achieve the coordinated operation of the transmission and distribution networks,this paper proposes a bi-level optimization method for coordinated transmission and distribution networks,which considers the nonparametric probabilistic characteristics of interactive power and flexible load.Firstly,the optimal power flow model of the lower-level distribution network is established on the basis of considering flexible load.The analytical mapping relationship between the interactive power and the renewable energy output is constructed based on the KKT conditions.In combination with the Gaussian mixture model,the probability distribution of the interac-tion power is described in a nonparametric form to improve the accuracy of the uncertainty description.Then,the interactive power safety interval constraints and unit commitment are taken into account,and the upper-level transmission network optimization model is established.Based on the KKT conditions,the bi-level model is converted to the sin-gle-level model for ensuring the coordination and feasibility of optimal dispatch for transmission and distribution networks.Finally,numerical examples on the IEEE 30-bus transmission system and IEEE 33-bus distribution system ver-ify the effectiveness and accuracy of the proposed method.
coordinated transmission and distribution networksinteractive powerflexible loadrenewable energyun-certaintynonparametric
万方数据
维普
