Modeling and Simulation of a
Solar PV and Battery Based DC
International Conference on Electrical, Electronics and
Optimization Techniques (ICEEOT) - 2016
Presenter: Mr. M.H.F Ahamed
DC Vs AC Microgrids.
No need to consider about synchronization with
utility grid and reactive power.
Steadily increasing fraction of power is consumed by
More resilient in the face of natural disasters.
Minimum losses at the interfaces.
Any change in the frequency in the utility grid does
not effect the operating frequency of ac loads in the
Usage of DC Microgrids Worldwide
Designed DC Microgrid System.
Designed system represents a isolated rural electrification system.
Transformer Battery Bank
48 V DC Bus
Critical for Microgrids based on distributed sources.
Objectives of Energy Management and Control are:
o Control of solar PV: Provides a reference voltage (Vmpp) for the
unidirectional DC-DC buck converter.
o Control of the DC-DC buck converter at the PV output: Forces the
solar array to operate at a voltage to harness the maximum power.
o Battery charging and discharging circuit control: Maintains the DC
link voltage at a desired value.
o Control of grid tied rectifier: Supply power to the loads when solar
power is not available.
Energy Management and Control.
Battery Dynamics and Energy Management System
Add an additional
load or halt
 R. Zamora and A. Srivastava, "Energy Management and Control algorithms for Integration of Energy storage Within Microgrid", in IEEE 23rd
International Symposium on Industrial Electronics (ISIE), 2014, pp. 1805 – 1810
Solar Maximum Power Point Tracking
Solar PV array and boost converter in PSCAD
Maximum power point tracking model in
Solar PV Characteristics Curve.
Algorithm used for mppt is incremental
Solar irradiance data is an actual variation measured at a
particular place in Sri Lanka.
Three scenarios are considered for the simulations.
During all three scenarios the main objectives are to keep the
bus voltage at 48VDC and battery state of charge (SOC)
within safe limits.
0 16 32 48 64 7272
PSCAD simulation time (s)
Variation of solar irradiance
Scenarios Considered for the
Scenario (01) Battery reaches its maximum charging limit
and then the system switches to halt mode when there is no
additional load available.
Scenario (02) Scenario 01 is extended by connecting an
additional dynamic load to the system during the charging
mode of the battery so that the battery SOC is regulated
within its maximum limit.
Scenario (03) Battery SOC reaches its minimum limit at a
particular point of operation. So in order to keep the DC link
voltage at 48 V load shedding is done.
Conclusions and Future Work.
Simulation results shows that energy management and
controls work as expected.
The designed system can be used to test various power
system scenarios and including transient and protection.
System can be further expanded by incorporating wind
turbines, super capacitors and diesel engines.
Our future work is to design a suitable protection
system for the designed microgrid.