An ADRC-based Model Predictive Direct Power Control to Alleviate Low-Frequency Oscillations of Traction Dual Rectifiers

2022 4th International Conference on Industrial Artificial Intelligence (IAI) Pub Date : 2022-08-24 DOI:10.1109/IAI55780.2022.9976682

Xinju Wang, Xiaoming Wang

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Abstract

Low-frequency oscillation (LFO) phenomenon of traction network often occurs in vehicle-grid coupling systems (VGCS), which may lead to traction blockade of the electric multiple units (EMUs). To improve the control of traction dual rectifiers (TDR) and suppress LFO, an auto-disturbance rejection control-based model predictive direct power control (ADRC-MPDPC) approach is developed. First, a voltage correction based on Newton interpolation is carried out to eliminate the error caused by the sampling process of the line-side voltage sensor. Besides, to improve the dynamic performance and robustness of the MPDPC, a voltage outer-loop control strategy based on first-order ADRC is designed. Finally, a simulation model of VGCS is constructed to test the control performance and the effectiveness of the proposed algorithm. The experimental results show that the proposed control can not only improve LFO of the dc-link voltage but also effectively alleviate the harmonic distortion of the current and suppress the power pulsation of MPDPC in the TDR.

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基于自抗扰控制器的牵引双整流器低频振荡预测直接功率控制

在车网耦合系统中，牵引网络经常出现低频振荡现象，这种现象可能导致动车组的牵引阻塞。为了提高牵引双整流器(TDR)的控制性能和抑制LFO，提出了一种基于自抗扰控制的模型预测直接功率控制(ADRC-MPDPC)方法。首先，进行基于牛顿插值的电压校正，消除线侧电压传感器采样过程产生的误差;为了提高MPDPC的动态性能和鲁棒性，设计了一种基于一阶自抗扰控制器的电压外环控制策略。最后，建立了VGCS的仿真模型，验证了该算法的控制性能和有效性。实验结果表明，所提出的控制方法不仅可以提高直流电压的LFO，而且可以有效地缓解电流的谐波畸变，抑制TDR中MPDPC的功率脉动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 4th International Conference on Industrial Artificial Intelligence (IAI)

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