ABSTRACT:
This
paper investigates a dynamic modeling, simulation and control of Photovoltaic
(PV)-wind hybrid system connected to electrical grid and feeds large plant with
critical variable loads. The technique of extracting maximum power point is
applied for the hybrid power system to capture maximum power under varying
climatic conditions. Moreover, Control strategy for power flow is proposed to
supply critical load demand of plant. Modeling and simulation of the proposed
hybrid system is performed using matlab-Simulink software. The Dynamic
performance of the proposed hybrid system is analyzed under different environmental
conditions. The simulation results have proven the effectiveness of the
proposed maximum power point tracking (MPPT) strategies in response to rapid
variations of weather conditions during the day. Moreover, the results show
that when the injected power from hybrid system is larger than critical load
power, the excess power will be injected to electrical grid. Otherwise, when
injected power is lower than critical power demand, electrical utility grid in cooperated
with hybrid power system will supply the critical load power. Moreover, when
the injected power from hybrid system is unavailable, load demand is entirely
fed by electrical utility.
KEYWORDS:
1. PV
2. Wind
3. Hybrid system
4. MPPT control
5. DFIG
6. Load
SOFTWARE:
MATLAB/SIMULINK
CONCLUSION:
In
this paper, modeling, simulation and control of grid connected
photovoltaic-wind hybrid power system have been successfully investigated. The
proposed hybrid system consists of two Photovoltaic (PV) stations placed at
different locations and one wind farm are integrated into main AC bus and
supply large plant with critical variable loads. The incremental conductance
MPPT technique is applied for both PV stations to extract maximum power under
variations of solar irradiance. Also, an improved MPPT control strategy based
on measurement of mechanical power is applied for wind farm to capture the
maximum power under changes of wind speed. Moreover, control strategy for power
flow is proposed to supply critical load demand of plant. The Dynamic
performance of the proposed hybrid system is tested under different environmental
conditions such as changes of solar irradiance and wind speed. In addition, the
validation of the proposed power flow is evaluated under variation of the
critical load demand. The simulation results have proven the robustness of the
MPPT control strategies in response to rapid variations in weather conditions
during the day. Moreover, the power flow control strategy successfully meets
the critical load demand of the plant.
REFERENCES:
[1]
R. Benadli and A. Sellami, "Sliding mode control of a photovoltaic-wind
hybrid system," in Electrical Sciences and Technologies in Maghreb
(CISTEM), 2014 International Conference on, 2014, pp. 1-8.
[2]
J. Hossain, N. Sakib, E. Hossain, and R. Bayindir, "Modelling and
Simulation of Solar Plant and Storage System: A Step to Microgrid
Technology," International Journal of Renewable Energy Research (IJRER),
vol. 7, pp. 723-737, 2017.
[3]
U. Choi, K. Lee, and F. Blaabjerg, "Power electronics for renewable energy
systems: Wind turbine and photovoltaic systems," in Renewable Energy
Research and Applications (ICRERA), 2012 International Conference on, 2012, pp.
1-8.
[4]
A. B. Oskouei, M. R. Banaei, and M. Sabahi, "Hybrid PV/wind system with
quinary asymmetric inverter without increasing DC-link number," Ain Shams
Engineering Journal, vol. 7, pp. 579-592, 2016.
[5]
H. Laabidi and A. Mami, "Grid connected Wind- Photovoltaic hybrid
system," in Energy (IYCE), 2015 5th International Youth Conference on,
2015, pp. 1-8
