Robust Nonlinear Current Sensorless Control of the Boost Converter with Constant Power Load
- 1 Department of Engineering Technology, Northern Illinois University, DeKalb, IL, United States
- 2 Department of Engineering Technology, Northern Illinois University, DeKalb, IL, United States
Abstract
The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. A PWM-based current-sensorless robust sliding mode controller is developed that requires only the measurement of the output voltage. An extended state observer is developed to estimate a lumped uncertainty signal that comprises the uncertain load power and the input voltage, the converter parasitics, the component uncertainties and the estimation of the derivative of the output voltage needed in the implementation of the controller. A linear sliding surface is used to derive the controller, which is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics despite the absence of the inductor’s current feedback. The robustness of the controller is validated by computer simulations.
- Cespedes, M., Xing, L. and Sun, J. (2011) Constant-Power Load System Stabilization by Passive Damping. IEEE Transactions on Power Electronics , 26, 1832-1836. https://doi.org/10.1109/tpel.2011.2151880
- Rahimi, A.M. and Emadi, A. (2009) Active Damping in DC/DC Power Electronic Converters: A Novel Method to Overcome the Problems of Constant Power Loads. IEEE Transactions on Industrial Electronics , 56, 1428-1439. https://doi.org/10.1109/tie.2009.2013748
- Rahimi, A.M., Williamson, G.A. and Emadi, A. (2010) Loop-Cancellation Technique: A Novel Nonlinear Feedback to Overcome the Destabilizing Effect of Constant-Power Loads. IEEE Transactions on Vehicular Technology , 59, 650-661. https://doi.org/10.1109/tvt.2009.2037429
- Sulligoi, G., Bosich, D., Giadrossi, G., Zhu, L., Cupelli, M. and Monti, A. (2014) Multiconverter Medium Voltage DC Power Systems on Ships: Constant-Power Loads Instability Solution Using Linearization via State Feedback Control. IEEE Transactions on Smart Grid , 5, 2543-2552. https://doi.org/10.1109/tsg.2014.2305904
- Singh, S., Rathore, N. and Fulwani, D. (2016) Mitigation of Negative Impedance Instabilities in a DC/DC Buck-Boost Converter with Composite Load. Journal of Power Electronics , 16, 1046-1055. https://doi.org/10.6113/jpe.2016.16.3.1046
- Martinez‐Treviño, B.A., El Aroudi, A., Vidal-Idiarte, E., Cid-Pastor, A. and Martinez-Salamero, L. (2019) Sliding-Mode Control of a Boost Converter under Constant Power Loading Conditions. IET Power Electronics , 12, 521-529. https://doi.org/10.1049/iet-pel.2018.5098
- He, W., Ortega, R., Machado, J.E. and Li, S. (2018) An Adaptive Passivity-Based Controller of a Buck-Boost Converter with a Constant Power Load. Asian Journal of Control , 21, 581-595. https://doi.org/10.1002/asjc.1751
- He, W., Soriano-Rangel, C.A., Ortega, R., Astolfi, A., Mancilla-David, F. and Li, S. (2018) Energy Shaping Control for Buck–Boost Converters with Unknown Constant Power Load. Control Engineering Practice , 74, 33-43. https://doi.org/10.1016/j.conengprac.2018.02.006
- Soriano-Rangel, C.A., He, W., Mancilla-David, F. and Ortega, R. (2021) Voltage Regulation in Buck–Boost Converters Feeding an Unknown Constant Power Load: An Adaptive Passivity-Based Control. IEEE Transactions on Control Systems Technology , 29, 395-402. https://doi.org/10.1109/tcst.2019.2959535
- Martinez-Trevino, B.A., Aroudi, A.E., Valderrama-Blavi, H., Cid-Pastor, A., Vidal-Idiarte, E. and Martinez-Salamero, L. (2021) PWM Nonlinear Control with Load Power Estimation for Output Voltage Regulation of a Boost Converter with Constant Power Load. IEEE Transactions on Power Electronics , 36, 2143-2153. https://doi.org/10.1109/tpel.2020.3008013