Abstract
In this paper, a systematic synchronization procedure is proposed for a doubly fed induction generator (DFIG) during unbalanced grid voltage conditions. The initial induced voltage at the open stator terminal is required to synchronize with the grid voltage in magnitude, frequency and phase. An open stator negative sequence rotor current controller is implemented with the conventional DFIG vector controller, which allows the induced stator voltage to become as unbalanced as the grid voltage, hence enabling a smooth connection. A brief comparison is provided for practical issues such as controller structure variation between DFIG open stator and normal operating conditions, and initial encoder rotor angle measurement offset. The procedure is validated experimentally on a 2.2 kW laboratory-scaled DFIG test bench.
Highlights
The results observed clearly demonstrate that setting rotor negative sequence current in the synchronous frame, according to (25), causes the induced stator voltage to become as unbalanced as the grid voltage
A method for connecting a doubly fed fed induction induction generator generator (DFIG) to unbalanced grid voltages is proposed in this paper
The operation, which forces the initial induced stator voltage to be as unbalanced as the grid voltage— procedure incorporates a negative sequence rotor current controller during DFIG open stator allowing a low impact synchronization with the grid
Summary
The constant, constant, increasing increasing demand demand in in energy energy is is moving moving the the world world away away from from traditional traditional power power generation and towards a more environmentally sustainable society. This is evident in the continuous generation and towards a more environmentally sustainable society. A conventional setup is shown in Figure controller scheme [5,6,7,8,9].
Sign-in/Register to view highlights & summary 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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
