Coordinate Control Strategy for Current Stabilization in an Aluminum Smelter Including on Load Tap Changer

Xu, Huanji; Xu, Qipin; Gao, Yuan; Liu, Haoming

doi:10.4236/epe.2013.54b267

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…) where I bk , E bk , C bk , L bk , and r bk are the current, power supply voltage, capacitance, inductance, and resistance of the buck converter in the ASL, respectively; I asl c , R asl c , and k c are the current, resistance, and control coefficient of the control winding in the ASL, respectively; I asl d , U asl d , R asl d , E asl d , and τ d are the DC current, DC voltage, resistance, electromotive force, and time constant of the potline in the ASL, respectively; d is the duty cycle of the buck converter in ASL; and U asl d0 is the rated value of the DC voltage of the potline. ASL control is based on the DC current control scheme, which aims to stabilize the DC I asl d at its reference value I asl ref in smelter loads [28], [29].…”

Section: Asl Modelmentioning

confidence: 99%

“…Note that the grid constraints mentioned here include the DC power flow (27) and an equation for the angle of the rotor of the generator (28), where the two equations are combined to derive the power flow equation (29). The power flow equation includes the grid constraints owing to the presence of the admittance matrix B 1 in the coefficient matrices F 1 and G 1 .…”

Section: ) Prediction Model Considering Grid Constraintsmentioning

confidence: 99%

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Secondary Frequency Control Considering Optimized Power Support From Virtual Power Plant Containing Aluminum Smelter Loads Through VSC-HVDC Link

Bao

Zhang

2023

Journal of Modern Power Systems and Clean Energy

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The growing number of renewable energy replacing conventional generators results in a loss of the reserve for frequency control in power systems, while many industrial power grids often have excess energy supply due to abundant wind and solar energy resources. This paper proposes a secondary frequency control (SFC) strategy that allows industrial power grids to provide emergency high-voltage direct current (HVDC) power support (EDCPS) for emergency to a system requiring power support through a voltage source converter (VSC) HVDC link. An architecture including multiple model predictive control (MPC) controllers with periodic communication is designed to simultaneously obtain optimized EDCPS capacity and minimize adverse effects on the providing power support (PPS) system. Moreover, a model of a virtual power plant (VPP) containing aluminum smelter loads (ASLs) and a high penetration of wind power is established for the PPS system. The flexibility and controllability of the VPP are improved by the demand response of the ASLs. The uncertainty associated with wind power is considered by chance constraints. The effectiveness of the proposed strategy is verified by simulation results using the data of an actual industrial power grid in Inner Mongolia, China. The DC voltage of the VSCs and the DC in the potlines of the ASLs are also investigated in the simulation. Index Terms--Secondary frequency control, power support, voltage source converter (VSC), high-voltage direct current (HVDC), model predictive control (MPC), virtual power plant (VPP), demand response. Peng Bao received the B. E. degree in electrical engineering from Zhengzhou University, Zhengzhou, China, in 2018 and the M.Sc. degree in electrical engineering from Shandong University, Jinan, China, in 2021. He is currently pursuing the Ph.D. degree in electrical engineering at Southeast University, Nanjing, China. His research interests include frequency control of power systems and demand response from aluminum smelter loads.

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Section: Asl Modelmentioning

confidence: 99%

Section: ) Prediction Model Considering Grid Constraintsmentioning

confidence: 99%

Secondary Frequency Control Considering Optimized Power Support From Virtual Power Plant Containing Aluminum Smelter Loads Through VSC-HVDC Link

Bao

Zhang

2023

Journal of Modern Power Systems and Clean Energy

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“…Various methods are used to regulate the magnitude of the voltage, such as step regulation of the voltage of the transformers under load, saturable reactor, etc. [1,2]. The most promising method is to use self-excited voltage inverters with a DC link [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Voltage regulation and phase quantity increase of two high-power 12-phase rectifiers

Safonov

Dziuba

2019

IJPEDS

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In this article, we present a new method of simultaneously increasing the phase quantity and regulating the rectified voltage for two 12-phase high-power rectifiers operating at a common load. Self-excited voltage inverters separately form the necessary voltages for voltage regulation and for increasing the phase quantity. The formed voltage is input with the help of a common booster transformer. Separating the inverters functions and using the common booster transformer makes it possible to reduce the installed power of the equipment significantly compared to similar circuits when the regulation range of the rectified voltage is up to 5%. Calculations show that the inverter power for increasing the phase quantity is about 3% of the rectifier power. The circuit was modeled in MatLab/Simulink and the electromagnetic processes in the rectifier were studied. The proposed method makes it possible to reduce the total harmonic distortion of the network current and the pulsation coefficient of the rectified voltage to the values typical for 24-phase rectifiers.

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Hierarchical control of aluminum smelter loads for primary frequency support considering control cost

Bao

Zhang

Cheng³

et al. 2020

International Journal of Electrical Power & Energy Systems

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Coordinate Control Strategy for Current Stabilization in an Aluminum Smelter Including on Load Tap Changer

Cited by 6 publications

References 11 publications

Secondary Frequency Control Considering Optimized Power Support From Virtual Power Plant Containing Aluminum Smelter Loads Through VSC-HVDC Link

Secondary Frequency Control Considering Optimized Power Support From Virtual Power Plant Containing Aluminum Smelter Loads Through VSC-HVDC Link

Voltage regulation and phase quantity increase of two high-power 12-phase rectifiers

Hierarchical control of aluminum smelter loads for primary frequency support considering control cost

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