Network Modeling and Operation Optimization of Electricity-HCNG-Integrated Energy System
Yue Qiu, Suyang Zhou, Wei Gu, Yuping Lu, Xiao-Ping Zhang, Kang Zhang, Gaoyan Han, Hongkun Lyu
Abstract
Smin/maxMinimum/maximum pipeline line pack, m 3 .q w,min/max Minimum/maximum injection of source node, m 3 /s.X nl Line reactance of line nl.F nl,max Line capacity of line nl, MW.P max grid Line capacity of public grid, MW. ramp min/max gt Minimum/maximum ramping rate of GT, MW/h.ρ air Air density, kg/m 3 .N wt Number of installed WT.R wt Radius of installed WT.A pv Installed area of PV. ϑ pv Incidence angle of PV. u t Wind speed at time t, m/s.ℜ t Solar radiation at time t, kWh/m 2 .η wt/pv/elz/mr Efficiency of WT/PV/ELZ/MR.η MPPT Efficiency of MPPT.Cap gt/elz/mr/hs Installed capacity of GT/ELZ/MR/HS, MW. γ cp/mr Electricity consumption rate of CP/MR, kWh/m 2 .σ hs Self-release rate of HS. η hs,ch/dis Charging/discharging efficiency of HS. µ hs,min/max Minimum/maximum storage state of HS. γ hs,ch/dis Charge/discharge rate of HS.V buy,max NG Maximum purchasing natural gas flow rate, m 3 /s.E. Variables ρ, v Gas density and velocity.p i/j,t Gas pressure at node i/j, Pa.q w,t Gas injection of source node w, m 3 /s.qij,t Average gas flow rate of pipeline ij, m 3 /s.q in/out ij,t Inflow/outflow rate of pipeline ij, m 3 /s.Sij,t Average line pack of pipeline ij, m 3 .pij,t Average gas pressure of pipeline ij, Pa.F nl,t Power flow of line nl, MW. θ n/l,t Phase angle of bus n/l.P grid,t Power flow transmitted through upper grid, MW.