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Large-Signal Stable Nonlinear Control of DC/DC Power Converter with Online Estimation of Uncertainties

Abstract : The Passivity-Based Control (PBC) is recognized as an effective energy shaping approach to guarantee the asymptotic stability of the whole system by using the passivity property. However, the model-based and sensor-based characteristics limit its development and application. The combination of the PBC and online estimation technique can solve these problems. The purpose of this paper is to propose a controller and an observer, which are designed simultaneously based on Hamiltonian framework and Lyapunov criterion. It leads to the system design without separation of the dynamics of the controller and the observer. The uncertainties in the model and parameters are considered as equivalent voltage and current sources. To reduce the number of sensors, input voltage, output current, and equivalent sources are estimated together. The steady-state error is eliminated by using this estimation technique. The exponential stability of the whole system (converter, controller, and observer) is proved by using a proper Lyapunov function. Simulation and experimental results from a 3 kW 270–350 V DC/DC boost converter with a Constant Power Load (CPL) are performed to confirm the proposed control algorithm. Since the system parameter values may vary with temperature and the equilibrium point, the robustness of the proposed method is verified without and with parameters uncertainties
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https://hal.univ-lorraine.fr/hal-03192926
Contributor : Jean-Philippe Martin <>
Submitted on : Monday, May 10, 2021 - 7:29:45 PM
Last modification on : Thursday, June 3, 2021 - 2:50:04 PM
Long-term archiving on: : Wednesday, August 11, 2021 - 8:13:06 PM

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Shengzhao Pang, Babak Nahid-Mobarakeh, Serge Pierfederici, Yigeng Huangfu, Guangzhao Luo, et al.. Large-Signal Stable Nonlinear Control of DC/DC Power Converter with Online Estimation of Uncertainties. IEEE Journal of Emerging and Selected Topics in Power Electronics, Institute of Electrical and Electronics Engineers, 2020, ⟨10.1109/JESTPE.2020.3010895⟩. ⟨hal-03192926⟩

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