ABSTRACT:
Injection of the wind
power into an electric grid affects the power quality. The performance of the
wind turbine and thereby power quality are determined on the basis of
measurements and the norms followed according to the guideline specified in
International Electro-technical Commission standard, IEC-61400. The influence
of the wind turbine in the grid system concerning the power quality
measurements are-the active power, reactive power, variation of voltage,
flicker, harmonics, and electrical behavior of switching operation and these
are measured according to national/international guidelines. The paper study
demonstrates the power quality problem due to installation of wind turbine with
the grid. In this proposed scheme STATic COMpensator (STATCOM) is connected at
a point of common coupling with a battery energy storage system (BESS) to mitigate
the power quality issues.
The battery energy storage
is integrated to sustain the real power source under fluctuating wind power.
The STATCOM control scheme for the grid connected wind energy generation system
for power quality improvement is simulated using MATLAB/SIMULINK in power
system block set. The effectiveness of the proposed scheme relives the main supply
source from the reactive power demand of the load and the induction generator.
The development of the grid co-ordination rule and the scheme for improvement
in power quality norms as per IEC-standard on the grid has been presented.
KEYWORDS:
1.
International
electro-technical commission (IEC)
2.
power quality
3.
wind generating system (WGS)
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.1.System operational scheme in grid system
CONCLUSION:
The
paper presents the STATCOM-based control scheme for power quality improvement
in grid connected wind generating system and with non linear load. The power
quality issues and its consequences on the consumer and electric utility are
presented. The operation of the control system developed for the STATCOM-BESS
in MATLAB/SIMULINK for maintaining the power quality is simulated. It has a
capability to cancel out the harmonic parts of the load current. It maintains
the source voltage and current in-phase and support the reactive power demand
for the wind generator and load at PCC in the grid system, thus it gives an
opportunity to enhance the utilization factor of transmission line. The
integrated wind generation and STATCOM with BESS have shown the outstanding
performance. Thus the proposed scheme in the grid connected system fulfills the
power quality norms as per the IEC standard 61400-21.
REFERENCES:
[1]
A. Sannino, “Global power systems for sustainable development,” in IEEE
General Meeting, Denver, CO, Jun. 2004.
[2]
K. S. Hook, Y. Liu, and S. Atcitty, “Mitigation of the wind generation integration
related power quality issues by energy storage,” EPQU J., vol. XII, no.
2, 2006.
[3]
R. Billinton and Y. Gao, “Energy conversion system models for adequacy assessment
of generating systems incorporating wind energy,” IEEE Trans. on E. Conv.,
vol. 23, no. 1, pp. 163–169, 2008, Multistate.
[4]
Wind Turbine Generating System—Part 21, International standard-IEC 61400-21,
2001.
[5]
J. Manel, “Power electronic system for grid integration of renewable energy
source: A survey,” IEEE Trans. Ind. Electron., vol. 53, no. 4, pp.
1002–1014, 2006, Carrasco.
