Modeling and Current Stabilization Coordinated Control Strategy of Rectifier System in an Aluminum Smelter

doi:10.11930/j.issn.10.11930.2015.1.121

Abstract

Abstract: The structure of high-power DC supply system of the aluminum smelter is described and the models of electrolytic cell, saturable reactor(SR) and on load tap changer(OLTC) are built respectively. A coordinated control strategy based on SR and OLTC is proposed to keep the DC current stable, in which the OLTC is used for discrete coarse control of series current and the saturable reactor is used for continuous fine control. The proposed coordinated control strategy has good performance when a large disturbance occurs, such as single unit is out of operation, or the anode effect occurs, et al. The rectifying system of 6 units is built by PSCAD/EMTDC, and simulation is carried out on grid voltage and load fluctuations. The simulation results show that the control strategy can keep the DC system on the optimum operation status and the series current stable.

Key words: saturable reactor, OLTC, electrolytic cell, coordinated control, anode effect, electrolytic aluminum, current stabilization, rectifier system

CLC Number:

TM7
TP237.2

LIU Haoming, MENG Xia, GAO Yuan, YUAN Xiaoling. Modeling and Current Stabilization Coordinated Control Strategy of Rectifier System in an Aluminum Smelter[J]. journal1, 2015, 48(1): 121-126.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.1.121

https://www.electricpower.com.cn/EN/Y2015/V48/I1/121

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