Energy management of servo press lines based on flywheel speed adaptive planning

PENG Fazhong; ZHANG Peng; WANG Liping; SHAO Zhufeng; YANG Di; YANG Kuai

doi:10.16511/j.cnki.qhdxxb.2020.22.014

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Journal of Tsinghua University(Science and Technology) ›› 2020, Vol. 60 ›› Issue (11) : 927-933. DOI: 10.16511/j.cnki.qhdxxb.2020.22.014

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Energy management of servo press lines based on flywheel speed adaptive planning

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Abstract

The main drive motors in large servo press lines often draw megawatts of power with frequent acceleration and deceleration of the slider, which strongly affects the power grid and power usage. Thus, effective energy management is indispensable to ensure smooth, efficient operation of large servo press lines. This paper studies how to improve the energy management of large servo press lines using flywheel energy storage. A gradient project algorithm and B-spline speed planning are used to develop a half-period flywheel speed adaptive planning algorithm. This algorithm better optimizes the power usage by introducing an approximately sinusoidal disturbance which avoids sudden changes in the flywheel speed. Finally, the servo press line model is analyzed theoretically in Simulink. The simulation results show that the half-period adaptive flywheel speed planning algorithm significantly improves the incoming line power and bus voltage fluctuations as an effective method for energy management of large servo press lines.

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servo press / energy management / flywheel energy storage / adaptive

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PENG Fazhong, ZHANG Peng, WANG Liping, SHAO Zhufeng, YANG Di, YANG Kuai. Energy management of servo press lines based on flywheel speed adaptive planning[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(11): 927-933 https://doi.org/10.16511/j.cnki.qhdxxb.2020.22.014

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