Energy balancing control for locomotive converter based on a discrete state event driven method

JU Jiahe; ZHAO Zhengming; SHI Bochen; ZHU Yicheng; YU Zhujun; LUO Yunfei; ZHANG Zhixue; HU Sideng; HE Xiangning

doi:10.16511/j.cnki.qhdxxb.2020.25.021

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Journal of Tsinghua University(Science and Technology) ›› 2020, Vol. 60 ›› Issue (9) : 763-772. DOI: 10.16511/j.cnki.qhdxxb.2020.25.021

ELECTRICAL ENGINEERING

Energy balancing control for locomotive converter based on a discrete state event driven method

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Abstract

Traction-oriented power electronic converters that are widely used in electric locomotives need to be very reliable and to avoid over-voltage problems caused by device stresses, so such devices need very stable DC bus voltages. Since the traction converter parameters are functions of the locomotive operating conditions, the single-phase rectifier control strategy must be very reliable to ensure the DC bus voltage stability. This paper presents an energy balancing control strategy for a single-phase rectifier for a traction converter which improves the converter dynamics. The control strategy needs to be tested for many different parameters and working conditions. A discrete state event driven (DSED) simulation method was used here in a numerical simulation platform for the traction converter for efficient, accurate multiple time scale (system level dynamic processes and device level transient processes) simulations. The traction converter simulation platform was used to compare the single-phase energy balance control with traditional PI control. The energy balance control is fast and effectively suppresses the DC bus fluctuations for all kinds of dynamic processes. Combining the energy balance control with the bus structure optimization also significantly reduces the turn-off electric force and allowance for the device.

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locomotive converter / energy balance control / discrete state event driven (DSED) / power electronics simulation

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JU Jiahe, ZHAO Zhengming, SHI Bochen, ZHU Yicheng, YU Zhujun, LUO Yunfei, ZHANG Zhixue, HU Sideng, HE Xiangning. Energy balancing control for locomotive converter based on a discrete state event driven method[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(9): 763-772 https://doi.org/10.16511/j.cnki.qhdxxb.2020.25.021

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