NDLI: Dynamic Equivalent Circuit Design in Three-level High Voltage Inverters Based On Functional Model of IGCT

Content Provider	IEEE Xplore Digital Library
Author	Bai, Hua Zhao, Zhengming
Copyright Year	2007
Description	Author affiliation: Department of Electrical Engineering, State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Tsinghua University, Beijing 100084, China (Bai, Hua; Zhao, Zhengming)
Abstract	The integrated gate commutated thyristors (IGCTs) are commonly used for construction of high voltage three-level PWM controlled voltage source converter/inverters. When the output voltage is greater than the maximum rated voltage, IGCTs are connected in series. To ensure the safe and reliable operation of the converter/inverters, special measures are required to equalize the voltages across the IGCTs connected in series. An effective method for balancing voltages is to use resistors for static voltage balancing and RC snubber circuits for dynamic voltage balancing. However, most of the previous research work reported in the literature focused on the dynamic circuit design for converters of the BUCK topology. Trade off is made only between the performance of dynamic voltage balancing and the turn-on loss without any consideration of di/dt endurance and any procedural steps, which makes the design procedure not suitable for converters of the three-level topology. Based on a functional model of IGCTs, this paper presents a procedure for optimum design of the dynamic voltage balancing circuit for a 6 kV/1250 kW inverter. The specific transient processes in the three-level topology with dynamic snubber circuit are simulated and the mechanisms are analyzed, which is absent in the previous work.
Starting Page	1095
Ending Page	1101
File Size	1186246
Page Count	7
File Format	PDF
ISBN	1424407133
ISSN	10482334
DOI	10.1109/APEX.2007.357652
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Equivalent circuits Pulse width modulation inverters Circuit topology Thyristors Snubbers Pulse width modulation converters Voltage control Integrated circuit reliability Integrated circuit measurements Resistors dead band IGCT dynamic equivalent circuit three-level inverter
Content Type	Text
Resource Type	Article

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