Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Incremental Passivity Based Control for DC-DC Boost Converters under Time-Varying Disturbances via a Generalized Proportional Integral Observer

  • He, Wei (Key Laboratory of Measurement and Control of CSE, Ministry of Education, School of Automation, Southeast University) ;
  • Li, Shihua (Key Laboratory of Measurement and Control of CSE, Ministry of Education, School of Automation, Southeast University) ;
  • Yang, Jun (Key Laboratory of Measurement and Control of CSE, Ministry of Education, School of Automation, Southeast University) ;
  • Wang, Zuo (Key Laboratory of Measurement and Control of CSE, Ministry of Education, School of Automation, Southeast University)
  • Received : 2016.08.01
  • Accepted : 2017.09.07
  • Published : 2018.01.20
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Abstract

In this paper, the voltage tracking control of a conventional DC-DC boost converter affected by unknown, time-varying circuit parameter perturbations is investigated. Based on the fundamental property of incremental passivity, a passivity based control law is designed. Then, to obtain a better disturbance rejection property, two generalized proportional integral (GPI) observers are employed to estimate the time-varying uncertainties in the output voltage and inductor current channels, and the estimated values are applied as feedforward compensation. Moreover, the global trajectory tracking performance of a system with disturbances is ensured under the composite controller. Finally, simulation and experiment studies are provided to demonstrate the feasibility and effectiveness of the proposed method. The results show that the proposed controller delivers a promising disturbance rejection capability as well as a good nominal tracking performance.

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References

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