By Topic

Improved control strategy for stand-alone distributed generation system under unbalanced and non-linear loads

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $33
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
H. Nian ; College of Electrical Engineering, Zhejiang University ; R. Zeng

This study presents an improved control strategy for a distributed generation system under stand-alone mode. Since there is no grid supply in a stand-alone system, the output voltage has to be controlled in the constant amplitude and frequency by the load-side inverter under the unbalanced and non-linear loads. The mathematic model of the load-side inverter is described. The dual-loop control method based on the stationary αβ reference coordinate is used for the load-side inverter so that the coordinate transformation is not needed. The outer-loop voltage controller consists of a proportional controller and a resonant regulator tuned at low-order harmonic frequency to compensate for the low-order harmonic components of the output voltage. A predictive current control scheme based on space vector modulation is adopted in the inner-loop current controller to improve the transient performance under the sudden load disturbances. Finally, experiment studies are carried out on a 5 kW stand-alone generation system. The experiment results show the excellent output voltage performance under both the steady-state and dynamic process with the load-adaptive ability.

Published in:

IET Renewable Power Generation  (Volume:5 ,  Issue: 5 )