Abstract
This research addresses power flow control problem of a grid-connected inverter in distributed generation applications. A real and reactive power control solution is proposed on the basis of an existing voltage control strategy developed for island operations. The power control solution takes advantage of a newly designed system parameter identification method and a nonlinear feedforward algorithm, both of which are based on Newton-Raphson iteration method and implemented in real time. The proposed power control solution also performs grid-line current conditioning and yields harmonic free grid-line current. A phase locked loop based algorithm is developed as a part of the solution to handle possible harmonic distorted grid-line voltage and maintain harmonic free line current. The effectiveness of the proposed techniques is demonstrated by both simulation and experimental results.
Original language | English |
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Pages (from-to) | 343-352 |
Number of pages | 10 |
Journal | IEEE Transactions on Power Electronics |
Volume | 23 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Keywords
- Distributed generation (DG)
- Newton-Raphson method
- Parameter estimation
- Power control
- Power conversion