Title :
Synthesis of Medium Voltage dc-to-dc Converters From Low-Voltage, High-Frequency PWM Switching Converters
Author :
Vorpérian, Vatché
Author_Institution :
California Inst. of Technol., Pasadena
Abstract :
Low-voltage dc-to-dc power conversion is a very mature industry which uses high-frequency pulsewidth modulation (PWM) switching techniques. The passive and active components needed to build low-voltage dc-to-dc converters are highly available, affordable and constantly improving. In this paper, a very simple and systematic method of using a large number of low-voltage, high-frequency PWM converters to synthesize highly redundant, medium voltage (4-40 kV) dc-to-dc converters is presented. Theoretical and practical considerations are discussed in necessary detail and test results of an actual 10-kW, 10 kV-to-400 V, converter built from 48 low-voltage forward converters are presented. Real-time and average reduced circuit models are derived to predict the dynamical behavior of the converter and to design the feedback control loop.
Keywords :
DC-DC power convertors; PWM power convertors; switching convertors; PWM switching converters; circuit models; feedback control loop; high-frequency pulsewidth modulation switching techniques; low-voltage forward converters; medium voltage dc-to-dc converters synthesis; power 10 kW; voltage 4 kV to 40 kV; Circuit synthesis; Circuit testing; DC-DC power converters; Feedback circuits; Medium voltage; Power conversion; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switching converters; Dc circuit breaker; Neptune power; PWM conversion; feedback control; high-frequency; medium voltage; reduced average model; reduced real-time model; redundancy; stacking;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2007.904170
