ABSTRACT:
In recent years, renewable energy resources are utilized to meet the
growing energy demand. The integration
of renewable energy resources with the grid incorporates power electronic
converters for conversion of energy. These power electronic converters introduce
power quality issues such as a harmonics, voltage regulation etc. Hence, to
improve the power quality issues, this work proposes a new control strategy for
a grid interconnected solar system. In this proposed work, a maximum power
point tracking (MPPT) scheme has been used to obtain maximum power from the
solar system and DC/DC converter is implemented to maintain a constant DC
voltage. An active filtering method is utilized to improve the power quality of
the grid connected solar system. The proposed system is validated through
dynamic simulation using MATLAB/Simulink Power system toolbox and results are
delivered to validate the effectiveness of the work.
KEYWORDS:
1. Power Quality
2. Active Power Filter
3. Fuzzy Controller
4. Harmonics Compensation
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Figure
1. Configurations of a photovoltaic interactive shunt active power filter
system.
EXPERIMENTAL RESULTS:
Figure
2. Source current for nonlinear load before compensation.
Figure 3. Voltage and current of source after
compensation
Figure 4. Voltage and current of source after
compensation.
This work has
presented a novel control of an existing grid interfacing inverter to improve
the quality of power at PCC. It has been proved that the grid-interfacing
inverter can be effectively utilized for power conditioning without affecting
its normal operation of real power transfer. This approach eliminates the need
for additional power conditioning equipment to improve the quality of power.
Extensive MATLAB/Simulink simulation results have validated the proposed
approach and have shown that the grid-interfacing inverter can be utilized as a
multi-function device.
REFERENCES:
[1] Akagi, H. (2006) Modern Active
Filters and Traditional Passive Filters. Bulletin of the Polish Academy of
Sciences Technical Sciences, 54, 255-269.
[2] Kazem, H.A. (2013) Harmonic
Mitigation Techniques Applied to Power Distribution Networks. Advances in Power
Electronics. http://dx.doi.org/10.1155/2013/591680
[3] Ravindra, S., Veera Reddy, V.C., Sivanagaraju,
S. and Gireesh Kumar, D. (2012) Design of Shunt Active Power Filter to
Eliminate the Harmonic Currents and to Compensate the Reactive Power under
Distorted and or Imbalanced Source Voltages in Steady State. International
Journal of Engineering Trends and Technology, 3, 1-6.
[4] Kumar, A. and Singh, J. (2013
Harmonic Mitigation and Power Quality Improvement Using Shunt Active Power
Filter. International Journal of Electrical, Electronics and Mechanical
Control, 2, 13 p.
[5] Gligor, A. (2009) Design
and Simulation of a Shunt Active Filter in Application for Control of Harmonic
Levels. Acta Universitatis Sapientiae, Electrical and Mechanical Engineering,
53-63.
