2019/12/07 by Rahul Ranjan Jha, Anamika Dubey, Jha, Rahul Ranjan +5 · 2 citations
Engineering · #Electric Power System Optimization #FOS: Mathematics #Microgrid Control and Optimization #Optimal Power Flow Distribution #Optimization and Control (math.OC) #Smart Grid Energy Management
paper · pdf · doi:10.48550/arxiv.1912.03596
openalex publication_date 2019/12/07 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
Conservation voltage reduction(CVR) uses Volt-VAR optimization(VVO) methods\nto reduce customer power demand by controlling the feeders' voltage control\ndevices. The objective of this paper is to present a VVO approach that controls\nthe systems' legacy voltage control devices and coordinates their operation\nwith smart inverter control. An optimal power flow (OPF) formulation is\nproposed by developing linear and nonlinear power flow approximations for a\nthree-phase unbalanced electric power distribution system. A bi-level\nVVOapproach is proposed where Level-1 optimizes the control of legacy devices\nand smart inverters using a linear approximate three-phase power flow. In\nLevel-2, the control parameters for smart inverters are adjusted to obtain an\noptimal and feasible solution by solving the approximate nonlinear OPF model.\nLevel-1 is modeled as a Mixed Integer Linear Program(MILP) while level-2 as a\nNonlinear Program(NLP) with a linear objective and quadratic constraints. The\nproposed approach is validated using 13-bus and 123-bus three-phase IEEE test\nfeeders and a 329-bus three-phase PNNL taxonomy feeder. The results demonstrate\nthe applicability of the framework in achieving the CVR objective. It is\ndemonstrated that the proposed coordinated control approach help reduce\nfeeders' power demand by reducing the bus voltages, the proposed approach\nmaintains an average feeder voltage of 0.96 pu. A higher energy saving is\nreported during the minimum load conditions. The results and approximation\nsteps are thoroughly validated using OpenDSS.\n