Compensating Voltage SAG/SWELL, THD using IDVR and STATCOM on integration of wind energy system into Distribution Network

Abstract

Power electronics converter based dynamic
voltage restorer (DVR) has been used for compensation or
mitigation of sudden rise/dips in voltage level under the
usage of sensitive loads. To reduce total harmonic distortion
(THD) different FACTS devices are used in distribution
system side mainly for fluctuating renewable energy sources
like wind, solar, etc. This paper proposes a new device
namely interline dynamic voltage restorer (IDVR) with a
common DC link with simple pulse width modulation (PWM)
control. And also FACTS device STATCOM has been added
in this network to reduce the total harmonic distortion
(THD) mainly for wind energy system when connected to the
grid side distribution system. To compensate these power
quality issues the measurements and norms are followed
according to guidelines given in International Electro-
technical Commission (IEC - 61400) standard, thereby the
performance of the wind energy system and power quality
issues are determined under sensitive loads. This IDVR and
STATCOM with a wind energy system have been simulated
and analyzed the results using MATLAB/Simulink. The
voltage Sag/well and THD are compensated on distribution
side network. The performance of the network also studied
and analyzed what happens when the energy stored in
common dc link discharges suddenly with the simulated
results.