Technical Brief

Switched Control of Three-Phase Voltage Source Pulsewidth-Modulated Rectifier Under Dynamic Load: Output Feedback and Robustness

[+] Author and Article Information
Zhaowu Ping

School of Electrical Engineering and Automation,
Hefei University of Technology,
Hefei 230009, China
e-mail: zwping@hfut.edu.cn

Hao Tang

School of Electrical Engineering and Automation,
Hefei University of Technology,
Hefei 230009, China
e-mail: htang@hfut.edu.cn

Jun-Guo Lu

Department of Automation,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: jglu@sjtu.edu.cn

Xueying Gao

Datang East China Electric Power
Test and Research Institute,
Hefei 230088, China
e-mail: gaoxy10000@126.com

Qi Tan

School of Electrical Engineering and Automation,
Hefei University of Technology,
Hefei 230009, China
e-mail: tanqi@hfut.edu.cn

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received November 3, 2014; final manuscript received June 30, 2016; published online August 10, 2016. Assoc. Editor: Umesh Vaidya.

J. Dyn. Sys., Meas., Control 138(12), 124501 (Aug 10, 2016) (6 pages) Paper No: DS-14-1450; doi: 10.1115/1.4034074 History: Received November 03, 2014; Revised June 30, 2016

Three-phase voltage source pulsewidth-modulated (PWM) rectifiers (VSRs) have received great attentions in industrial applications. Recently, some attempt has been made to study the flexible direct current (DC)-bus voltage regulation problem under dynamic load of three-phase VSRs by switched control. Several proportional-integral (PI) controllers are designed for different load resistance range while only one PI controller is implemented for a given time instant by regarding the load resistance as the switching law. However, the existing approach is based on state feedback control, which requires the measurement of source current and DC-bus voltage. In this paper, we will adopt an output feedback control scheme, i.e., only DC-bus voltage should be measured. Compared with the existing result, our design requires less information and reduces the cost. Moreover, the robustness analysis of plant parameters is given when all the states are available. Simulation results demonstrate the effectiveness of our design.

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Fig. 1

Three-phase voltage source PWM converter

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Fig. 2

Scheme of the proposed output feedback control strategy

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Fig. 3

Power of dynamic load

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Fig. 4

DC-bus voltage of VSRs: full-order observer

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Fig. 5

DC-bus voltage of VSRs: reduced-order observer

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Fig. 6

DC-bus voltage of VSRs: robustness



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