A Study on the Voltage Control Loop of a Self-excited Synchronous Generator in a Micro-Hydroelectric Power Plant

E. Spunei, I. Piroi, F. Piroi:
"A Study on the Voltage Control Loop of a Self-excited Synchronous Generator in a Micro-Hydroelectric Power Plant";
Vortrag: 10th INTERNATIONAL CONFERENCE ON ELECTROMECHANICAL AND POWER SYSTEMS, Craiova, Romania AND Chisinau, Moldova; 06.10.2015 - 09.10.2015; in:"Proceedings of the 10th INTERNATIONAL CONFERENCE ON ELECTROMECHANICAL AND POWER SYSTEMS", ALMA Verlag, Craiova, Romania, (2015), ISBN: 978-606-567-284-0; S. 237 - 240.

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Abstract:


This work presents the behaviour of the voltage control loop in a self-excited synchronous generator running in the dynamic regime. The voltage control loop plays an important role in choosing and adjusting the controlling closed-loop. The output regulator of this loop is a specific three-phased rectifier: in the synchronous generatorĀ“s self-exciting phase the rectifier functions are an uncontrolled rectifier; after the phase nominal voltage is reached, the rectifier functions as a semi-controlled rectifier. The switch between the two functioning regimes is done without a pause. This work underlines the control loop performances in the dynamic regime for type P or PI rectifiers. The stability analysis was done following the simplified Nyquist criterion and hodographs. The analysis method can be used for other applications with minor modifications of the program.