Standalone hybrid generation system for the remote area of Thar, Pakistan
Fig. 2.29 Generalized power electronics converter for wind systems
This general structure is suitable for any type of wind energy systems.
For the PM synchronous
generator, as discussed in Figure 16, the rectifier and boost converter
can be replaced by the PWM
rectifier to achieve the same level of control. Based on the control design for the back-to-back PWM
converter system, various advantages can be obtained such as (Simoes and Farret 2004):
•
The line-side power factor is unity with no harmonic current injection (satisfies IEEE 519).
•
Wind generator output current is sinusoidal.
•
There are no harmonic copper losses.
•
Continuous power generation from zero to the highest turbine speed is possible.
•
Islanded operation of the system is possible with a start-up capacitor charging the
battery.
Fig. 2.30 Control block diagram of PWM converter with PMSG
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