COMPOUND NONLINEAR CONTROL OF MULTI-LEVEL BOOST CONVERTER WITH CONSTANT POWER LOAD

Luo Wei; Lu Yimin

doi:10.19912/j.0254-0096.tynxb.2020-1196

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (7) : 506-512. DOI: 10.19912/j.0254-0096.tynxb.2020-1196

COMPOUND NONLINEAR CONTROL OF MULTI-LEVEL BOOST CONVERTER WITH CONSTANT POWER LOAD

Luo Wei, Lu Yimin

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Abstract

This paper proposes a composite nonlinear control strategy that combines a nonlinear disturbance observer and an adaptive sliding mode controller for a multilevel Boost converter with a constant power load. First, exact feedback linearization method is used to transform the model into Brunovsky’s canonical form. Then under the premise of ensuring the large signal stability of the system, the adaptive control method and the nonlinear disturbance observer are added to the design of the sliding mode controller, and the stability of the entire closed-loop system is proved by Lyapunov theory. Simulation and experimental results show that, compared with the dual closed-loop PI control method, this control strategy has better dynamic regulation performance and stronger robustness.

Key words

DC-DC converter / feedback linearization / sliding mode control / nonlinear disturbance observer / constant power load

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Luo Wei, Lu Yimin. COMPOUND NONLINEAR CONTROL OF MULTI-LEVEL BOOST CONVERTER WITH CONSTANT POWER LOAD[J]. Acta Energiae Solaris Sinica. 2022, 43(7): 506-512 https://doi.org/10.19912/j.0254-0096.tynxb.2020-1196

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