NDLI: A General Control Strategy for Input-Series–Output-Series Modular DC

Content Provider	IEEE Xplore Digital Library
Author	Deshang Sha Zhiqiang Guo Tianmei Luo Xiaozhong Liao
Copyright Year	1986
Abstract	Input-series-output-series (ISOS) connected dc-dc converters enable the utilization of low-voltage rating switches in high-voltage-input and high-voltage-output applications that require galvanic isolation. To achieve input or output power balance among all the constituent modules, a general control strategy eliminating the use of input-voltage sharing (IVS) loops is proposed. The instability mechanism of independent output-voltage sharing control has been investigated by using the Routh-Hurwitz criterion. From the same criterion, a stability design method for the proposed control strategy has been developed. Detailed comparison of the proposed control technique, voltage-mode IVS, and current-mode IVS control methods is made. In comparison, the proposed control strategy has the same performance compared with current-mode IVS control. The control system design is simplified by avoiding mandatory IVS loops which are needed for IVS control. Both the steady-state and dynamic performance are improved with the proposed control strategy in comparison with voltage-mode IVS control. Using the proposed control strategy, excellent input and output power balance can be achieved for the ISOS connection during transient and steady-state conditions. The proposed control strategy performance is validated by experimental results of a 960-W ISOS system composed of three two-transistor forward dc-dc converters.
Sponsorship	IEEE Power Electronics Society
Starting Page	3766
Ending Page	3775
Page Count	10
File Size	1390600
File Format	PDF
ISSN	08858993
Volume Number	29
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	ISO Voltage control Stability criteria Steady-state ISO standards Sensors output-voltage sharing (OVS) DC–DC converter input-series–output-series (ISOS) input-voltage sharing (IVS)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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