Power Flow Control of a Single Distributed
Generation Unit
Min Dai, M.N. Marwali, Jin-Woo Jung and A. Keyhani
Ohio State Univ, Columbus, OH, USA ;
This paper appears in : IEEE Transactions on
Power Electronics
Date: January 2008
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.