1.Key Laboratory of Smart Grid of Ministry of Education,Tianjin University;2.College of Electrical Engineering and Automation,Shandong University of Science and Technology
Due to high penetration of distributed generations, energy storage systems, and responsible loads in active distribution network (ADN), nodal power injections could vary frequently and significantly. Thus, it becomes crucial to assess the influence of power injection variations on key operation characters of ADN, such as nodal voltages, line losses, and branch power flows, accurately and quickly. The traditional sensitivity models can not satisfy the accuracy requirement of ADN analysis when the nodal power injections change greatly. In this paper, branch equation of distribution system is analyzed to derive the complete power flow sensitivity models with wide adaptability, which contain a quadratic sensitivity model of nodal power injections to line losses, a linear sensitivity model of nodal power injections to nodal voltages, a quadratic and a simplified linear sensitivity model of nodal power injections to branch powers. Simulation results of the IEEE33 distribution system and 123-bus distribution system illustrate the accuracy and efficiency of the proposed sensitivity models.
LIU Qi,WANG Shouxiang,Ji Xingquan.Power Flow Sensitivity Analysis Model with Wide Adaptability in Active Distribution Network[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190509002.