TITLE:
Coordinate Control Strategy for Current Stabilization in an Aluminum Smelter Including on Load Tap Changer
AUTHORS:
Heping Xu, Qipin Xu, Yuan Gao, Haoming Liu
KEYWORDS:
Current Stabilization; Diode Rectifier; Self-saturable Reactor; OLTC; Coordinate Control
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
20,
2013
ABSTRACT: The performance of the current
stabilization control system in an aluminum smelter affects the quality and the
quantity of the electrolytic products. This paper elaborates the power supply,
in which the diode rectifiers and the self-saturable reactors could keep the
series current stable, then describes the basic principle of the rectifier unit
control and the series current control. A coordinate strategy is proposed to
keep the series current stable, the self-saturable reactors are controlled by a
proportional-integral control scheme and the on load tap changers of
transformer are triggered by the errors between the setting value of the series
voltage and the measured values of the series voltage. Simulation results on
PSCAD/EMTDC show that the effectiveness of the proposed strategy to keep the
series current stable.