NDLI: An improved control strategy for the current source back-to-back converters

Content Provider	IEEE Xplore Digital Library
Author	Longcheng Tan Yaohua Li Congwei Liu Ping Wang
Copyright Year	2008
Description	Author affiliation: Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing (Longcheng Tan; Yaohua Li; Congwei Liu; Ping Wang)
Abstract	The current source back-to-back converters have been largely neglected because of the slow transient response and low power factor, which is mainly resulted from a fixed PWM pattern and a poor control method. However, current source converters have intrinsic advantages such as the high reliability and the inherent current limiting capability. Due to these advantages, more and more people have been paying attention to the current source converters. In this paper, a current source back-to-back converter based on the front-end PWM current source rectifier, the DC link reactor, and the back-end PWM current inverter is proposed. A combination control of the output voltage control, the modulation index of the inverter, and the DC link current is proposed, which can maintain the DC link current to a value such that the modulation index of the inverter remains high at all times resulting in less energy loss and lower voltage harmonic distortion. In the rectifier side, an advanced power factor control is proposed, which can provide the desired constant DC link current and operate at the maximum achievable input power factor. In the inverter side, an improved voltage control based on the synchronous frame DQ PI is proposed, which can achieve zero steady-state error and have quick dynamic response to the load changes. Through the proposed control strategy, the current source back-to-back converter system can perform as well as the voltage source back-to-back converter system. All these analyses and the effectiveness of the control method are firstly demonstrated by simulation results, and are verified further in a 5 kVA laboratory prototype.
Starting Page	1985
Ending Page	1989
File Size	490432
Page Count	5
File Format	PDF
ISBN	9781424438266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	IEEE Consumer Electronics Society(CES)
Subject Keyword	Pulse width modulation inverters Voltage control Reactive power Pulse width modulation converters Rectifiers Transient response Pulse width modulation Current limiters Inductors Energy loss
Content Type	Text
Resource Type	Article

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