Title :
Control design for a very low-frequency high-voltage test system
Author :
Cao, Zhiyu ; Fröhleke, Norbert ; Böcker, Joachim
Author_Institution :
Power Electron. & Electr. Drives, Paderborn Univ., Paderborn, Germany
Abstract :
In recent two decades the application of high voltage test systems using the concept of very low frequency is more and more accepted by industries. This contribution deals with the control design for a novel high voltage test system generating a true sinus test voltage of 85 kV (RMS) at 0.1 Hz based on a zero-voltage switched LCC-resonant converter and a 3-stage Cockcroft Walton voltage multiplier rectifier. The cascade control strategy using an output current observer enables substitution of voluminous and costly high-voltage current sensors. The true sinus test generator was implemented and verified by experimental tests, affirming the optimum choice of the topology for the demanding requirements and indicating a better THD-quality of the test voltage as compared to previous solutions.
Keywords :
cascade control; power integrated circuits; voltage multipliers; zero voltage switching; Cockcroft Walton voltage multiplier rectifier; LCC-resonant converter; cascade control strategy; high-voltage current sensors; high-voltage test system; output current observer; true sinus test voltage; very low-frequency test system; zero voltage switching; Cables; Capacitance; Control design; Power supplies; Rectifiers; Resonance; Switching converters; System testing; Voltage control; Zero voltage switching; Converter control; High Voltage power converters; Resonant converter;
Conference_Titel :
Power Electronics and Applications, 2009. EPE '09. 13th European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-4432-8
Electronic_ISBN :
978-90-75815-13-9
