Implementation of Optimal Load Balancing Strategy for Hybrid Energy Management System in DC/AC Microgrid with PV and Battery Storage

Document Type : Original Article

Authors

1 Ravindra College of Engineering for Women, India

2 Haramaya University, Ethiopia

Abstract

The proposed paper presents the DC/AC microgrid modeling using the Energy storage units and photovoltaic (PV) panels. The modal consists of a two stage power conversion. The power is supplied to the both DC and AC loads by this PV solar panels. The suitable way to explore the PV generation model is by using manufacturer datasheet. A bidirectional converter is connected to the battery storage system and dc bus. To keep the bus voltage stable, the storage system absorbs the excess power whenever generation is more and delivers power to the load when generation is less.  This system eliminates hazards of islanding by supply the local loads continuously incase of grid discontinuity. This paper emphasizes on control and stability of dc bus voltage and energy management scheme. Matlab/Simulink is used for integration of system modeling and efficiency of the system is verified by simulation.

Keywords


1. Hoffert, M.I., Caldeira, K., Benford, G., Criswell, D.R., Green,
C., Herzog, H., Jain, A.K., Kheshgi, H.S., Lackner, K.S., Lewis,
J.S. and Lightfoot, H.D, "Advanced technology paths to global
climate stability: Energy for a greenhouse planet" , Science, Vol.
298, No. 5595, (2002) 981-987. 
2. J.Wang and F.Yang, "Optimal capacity allocation of standalone
wind/solar/battery hybrid power system based on improved
particle swarm optimization algorithm", IET Renewable Power
Generation, Power Generation, Vol.7, No.5, (2013) 443-448. 
3. C. Wang and M. H. Nehrir, "Power management of a stand-alone
wind/photovoltaic/fuel cell energy system", IEEE Transactions
Energy Conversion, Vol.23, No.3, (20008) 957-967. 
4. A. Mohamed and T. Khatib, "Optimal sizing of a PV/wind/diesel
hybrid energy system for Malaysia", IEEE Industrial
Technology International Conference, (2013) 752 – 757. 
5. E. Mazhari, et al, “Hybridsimulation and optimization-based
design and operation of integrated photovoltaic generation,
storage units, and grid”, Simulation Modelling Practice and
Theory, Vol. 19, No. 1, (2011), 463–481. 
6. Moriana, I., I. San Martin, and P. Sanchis. "Wind-photovoltaic
hybrid systems design." In SPEEDAM ,(2010) 610-615. IEEE. 
7. Borowy, Bogdan S., and Ziyad M. Salameh. "Methodology for
optimally sizing the combination of a battery bank and PV array
in a wind/PV hybrid system." IEEE Transactions on Energy
Conversion, Vol. 11, No. 2 (1996): 367-375. 
8. Teleke, Sercan, Mesut E. Baran, Alex Q. Huang, Subhashish
Bhattacharya, and Loren Anderson. "Control strategies for battery
energy storage for wind farm dispatching." IEEE Transactions
on Energy Conversion, Vol. 24, No. 3 (2009), 725-732.