ABSTRACT:
This project presents a
near-unity-power-factor frontend rectifier employing two current control methods,
namely, average current control and hysteresis current control, is considered.
This rectifier is interfaced with a fixed-pitch wind turbine driving a
permanent-magnet synchronous generator. A traditional diode-bridge rectifier
without any current control is used to compare the performance with the
proposed converter. Two constant wind speed conditions and a varying wind speed
profile are used to study the performance of this converter for a rated
stand-alone load. The parameters under study are the input power factor and
total harmonic distortion of the input currents to the converter. The wind
turbine generator–power electronic converter is modeled in PSIM, and the simulation
results verify the efficacy of the system in delivering satisfactory performance
for the conditions discussed. The efficacy of the control techniques is validated
with a 1.5-kW laboratory prototype, and the experimental results are presented.
1. Packed U-Cell
Inverter
2. Nine-level
converter
3. Single carrier
modulation
4. SiC switch
Figure 1. Block diagram of a fixed speed wind energy system including a conventional SCIG, a gearbox and a transformer.
REFERENCES:
[1]
Aditya Venkataraman, Student Member, IEEE, Ali I. Maswood, Senior Member, IEEE,
Nirnaya Sarangan, and Ooi H. P. Gabriel, Student Member, IEEE "An Efficient
UPF Rectifier for a Stand-Alone Wind Energy Conversion System" IEEE
TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 50, NO. 2, MARCH/APRIL 2014
[2]
Online. Available: http://en.wikipedia.org/wiki/Wind_energy
[3]
M. Druga, C. Nichita, G. Barakat, B. Dakyo, and E. Ceanga, ―A peak power
tracking wind system operating with a controlled load structure for stand-alone
applications,‖ in Proc. 13th EPE, 2009, pp. 1–9.
[4]
S. Kim, P. Enjeti, D. Rendusara, and I. J. Pitel, ―A new method to improve THD
and reduce harmonics generated by a three phase diode rectifier type utility interface,‖
in Conf. Rec. IEEE IAS Annu. Meeting, 1994, vol. 2, pp. 1071–1077.
[5]
A. I. Maswood and L. Fangrui, ―A novel unity power factor input stage for AC
drive application,‖ IEEE Trans. Power Electron., vol. 20, no. 4, pp. 839–846,
Jul. 2005.