OPTIMAL ENERGY MANAGEMENT OF A RURAL MICROGRID SYSTEM USING MULTI-OBJECTIVE OPTIMIZATION

摘要

Systems and methods are disclosed to improve energy efficiency of a farm with livestock wastes by generating a cooling, heating, and power (CCHP) microgrid model; performing on a computer a multi-objective optimization to improve system efficiency of energy utilization and reduce environmental problems caused by animal wastes; and displaying results of the optimization for review.

主权项

1. A computer implemented method to improve energy efficiency of a farm with livestock waste with a microgrid, comprising:
generating a comprehensive cooling, heating, and power (CCHP) microgrid model; performing on a computer a multi-objective optimization to improve system efficiency of energy utilization and reduce environmental problems caused by animal waste; displaying results of the optimization for review; modeling an objective function of system operating cost (OC), including biogas fuel cost (FC), internal combustion engine (ICE) start up and shut down cost (SSC), equipment operation and maintenance cost (OMC), and cost of electricity bought from the grid (EBC) as follows:OC=FC+SSC+OMC+EBCFC=∑t=1NΔT(Ft+FGB,t+FACC,t)CBioSSC=∑t=1N∑g=1M(vg,tSU+wg,tSD)OMC=∑t=1NΔT(OMICE∑g=1MPg,t+OMGBPGB,t+OMACCPACC,t+OMARPAR,t)EBC=∑t=1NΔT(CGriEPgrid,t)where ΔT is hourly time step, CBio is the biogas cost in dollars per liter ($/L), Ft,GB,ACC are fuel cost of ICEs, gas boiler, and absorption chiller for cooling in L/h, SU, SD are start up cost and shut down cost in $, OMICE,GB,ACC,AR are operation and maintenance cost of ICEs, GB, ACC, and AR in $/kWh, PGB,ACC,AR,t is output of gas boiler, absorption chiller for cooling and absorption refrigerator in time t in kW, CGriE is electricity cost of the grid in $/kWh, Pgrid,t is the power bought from the grid in kW, M is the number of generators, and N is a time t counter;wherein the above steps are carried out by a computer having a processor and memory.