Abstract
The synchronized and interleaving control of the parallel-connected voltage source converters (VSCs) is described in this chapter. The component mismatch, application of different voltage vectors, and dead-time effects may lead to the circulating current between the parallel-connected VSCs. The circulating current is analyzed for the parallel-connected VSCs with the common and separate DC-bus arrangements. The control techniques for the proper load sharing and circulating current reduction are discussed in detail. The harmonic performance of the parallel-connected VSCs can be improved by interleaving control. The harmonic performance of various commonly used pulse width modulation (PWM) schemes is evaluated. Since the parallel interleaved VSCs yield multilevel voltage waveforms, a multilevel PWM scheme can be used. A modified multilevel PWM scheme that leads to improved harmonic performance is also illustrated. Various filtering techniques for the high-frequency circulating current suppression are also discussed.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call