Control strategy for combined co-phase power supply system based on theory of control without harmonic detection and selective harmonic compensation

Guo Wang, Wenhuan Chang, Claus Leth Bak, Mo Zhou, Zeyu Hao

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

8 Citationer (Scopus)

Abstract

The conventional control method is seriously influenced by load current detection accuracy and can't well track high-order harmonic current of high-speed traction loads, a selective harmonic current control strategy for CCD(Co-phase Compensation Device) in combined co-phase power supply system is proposed. This control strategy needs to detect only the output voltage and current of two single-phase converters but not the load current. The VPI(Vector Proportional Integral) controller is applied to independently track each harmonic current in the output current error of single-phase converter connected with load. The proposed method is not affected by the impact of load current detection accuracy, and has good performance of tracking each harmonic current of the traction loads. The conventional and modified models of combined cophase power supply system, and the model of HB-MMC4 based on proposed control strategy are established based on MATLAB/Simulink. Simulative results for AC-DC, AC-DC-AC and mixed running loads respectively verify the correctness of the proposed current control method and the effectiveness of its application in practical project.

OriginalsprogEngelsk
TidsskriftDianli Zidonghua Shebei
Vol/bind37
Udgave nummer12
Sider (fra-til)130-137
Antal sider8
ISSN1006-6047
DOI
StatusUdgivet - 10 dec. 2017

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