Cascaded Extended State Observer-Based Sliding Mode Control for DC-DC Converter with Time-Varying Power Fluctuation

2022 IEEE Industry Applications Society Annual Meeting (IAS) Pub Date : 2022-10-09 DOI:10.1109/IAS54023.2022.9939921

Liangcai Xu, Jianxing Liu, S. Zhuo, Y. Huangfu, F. Gao

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Abstract

In this paper, a cascaded extended state observer-based sliding mode control (SMC) is proposed for the typical microgrid (MG) interfaced dc-dc boost converter. For a given MG system, the power fluctuation is unpredictable, which may cause an unstable dc-bus voltage. In that situation, all the dc-bus connected electronic loads cannot work normally. In order to maintain a stable dc-bus voltage, additional power sources with a suitable power converter and the advanced controller are necessary. Especially, the controller for the power converter plays a crucial role in reducing the power fluctuation and regulating the dc-bus voltage. In this paper, to improve the ability of the converters to reject external power disturbance, a cascaded extended state observer is designed to estimate the lumped disturbance more accurately. Besides, the continuous SMC method is adopted to provide a feedback control loop. The corresponding simulation results could highly validate the effectiveness of the proposed control method.

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功率波动时变DC-DC变换器的级联扩展状态观测器滑模控制

针对典型的微电网接口dc-dc升压变换器，提出了一种基于扩展状态观测器的级联滑模控制方法。对于给定的MG系统，功率波动是不可预测的，这可能导致直流母线电压不稳定。在这种情况下，所有直流母线连接的电子负载都不能正常工作。为了保持一个稳定的直流母线电压，额外的电源与合适的电源转换器和先进的控制器是必要的。其中，功率变换器的控制器在减小功率波动和调节直流母线电压方面起着至关重要的作用。为了提高变换器抵抗外部扰动的能力，本文设计了一个级联扩展状态观测器来更准确地估计集总扰动。此外，采用连续SMC方法提供反馈控制回路。仿真结果验证了所提控制方法的有效性。

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 IEEE Industry Applications Society Annual Meeting (IAS)

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