Abstract
In this paper, an efficient energy management system (EMS) is proposed for optimal operation of multiple electrically coupled microgrids (MGs). A new bi-level EMS is employed as an enhanced technique to coordinate vehicle-to-grid (V2G) operation of electric vehicles (EVs) with a stochastic framework in a multi-microgrid system. Hierarchical EMS helps the system to preserve the privacy of each MG. The EV scheduling and demand response programs have been integrated simultaneously in the optimization strategy to reduce the load demand of the peak hours and reshape the load profile. Uncertainties related to the system load demand, renewable generations, EV fleet behavior and energy price are considered. The proposed stochastic system is solved by adaptive particle swarm optimization algorithm. Numerical studies on a two electrically coupled industrial and residential MGs test system verify the efficiency of proposed EMS for cost reduction of the system and optimal operation of V2G.
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Abbreviations
- APSO:
-
Adaptive particle swarm optimization
- CEMS:
-
Central energy management system
- DR:
-
Demand response
- DRP:
-
Demand response program
- EMS:
-
Energy management system
- ELS:
-
Elitist learning strategy
- EV:
-
Electric vehicle
- ICA:
-
Imperialist competitive algorithm
- FC:
-
Fuel cell
- MG:
-
Microgrid
- MMG:
-
Multi-microgrid
- MT:
-
Microturbine
- O&M:
-
Operation and maintenance
- PDF:
-
Probability density function
- PV:
-
Photovoltaics
- SoC:
-
State of charge
- V2G:
-
Vehicle to grid
- WT:
-
Wind turbine
- i, j :
-
Index for particles in PSO
- d :
-
Index for dimensions in PSO
- k :
-
Index for EV number
- m, n :
-
Index for MG
- s :
-
Index for generation sources
- t, ta, tb :
-
Index for time
- B :
-
Price bid of system components
- Bold, Bnew :
-
Electricity price before/after DRP
- c1, c2 :
-
Acceleration coefficients in PSO
- C :
-
Cost of system components
- C EV :
-
Cost of V2G program of EVs
- C O&M :
-
Cost of O&M of microsources
- dis i :
-
Mean distance of particle i in APSO
- E V :
-
Energy of EV
- E trip :
-
Energy consumed by EV in the trips
- EiniV, EfinV :
-
Initial/final Energy of EV at the beginning and end of the day
- E(ta, tb):
-
Self (ta = tb) or cross elasticity
- f :
-
Evolutionary factor in APSO
- pBest, gBest :
-
Personally/globally best particle in PSO
- PLold, PLnew :
-
Demand value before/after DRP
- ∆PL :
-
Difference between demands before and after DRP
- PG,WT, Pr,WT :
-
Generation/nominal power of WT
- PG,PV, Pr,PV :
-
Generation/nominal power of PV module
- P LC :
-
Power amount of load curtailment
- P Gen :
-
Generation power of microsources
- PCH, PDCH :
-
Charging/discharging power of EVs
- PVIP, PVOP :
-
Virtual input/output power of MG
- PMG,in, PMG,out :
-
Imported/exported power of the MG to/from other MGs
- PGrid,in, PGrid,out :
-
Imported/exported power of the MG to/from the grid
- P Load :
-
Total load of MG
- RSTD, RC :
-
Standard/constant Solar radiation
- R L :
-
Costumers’ revenue
- S :
-
Customers’ benefit
- U V :
-
State of EV in V2G program (charging/discharging/idle)
- vr, vci, vco :
-
Nominal/cut-in/cut-out wind speed
- v i d :
-
Velocity of particle i in PSO
- w :
-
Inertia weight in PSO
- x i d :
-
Position of particle i in PSO
- ηCh, ηDCh :
-
Charging/discharging efficiency of EVs
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Mirzaei, M., Keypour, R., Savaghebi, M. et al. Probabilistic Optimal Bi-level Scheduling of a Multi-Microgrid System with Electric Vehicles. J. Electr. Eng. Technol. 15, 2421–2436 (2020). https://doi.org/10.1007/s42835-020-00504-8
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DOI: https://doi.org/10.1007/s42835-020-00504-8