Nonlinear Control of a Buck Converter Which Feeds a Constant Power Load

Solsona, J.; Jorge, Sebastián Gómez; Busada, Claudio A.

doi:10.1109/tpel.2015.2392371

Cited by 67 publications

(39 citation statements)

References 31 publications

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“…Feedback linearization is a nonlinear control technique to overcome the instability caused by CPL, as proposed in [47,52,[86][87][88]. This technique aims to cancel the nonlinearity introduced by CPL by determining the parameters that can be manipulated to obtain a system without instability without using a conventional PI controller, which has its disadvantages.…”

Section: Feedback Linearizationmentioning

confidence: 99%

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

et al. 2017

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This paper provides a comprehensive review of the major concepts associated with the µgrid, such as constant power load (CPL), incremental negative resistance or impedance (INR/I) and its dynamic behaviours on the µgrid, and power system distribution (PSD). In general, a µgrid is defined as a cluster of different types of electrical loads and renewable energy sources (distributed generations) under a unified controller within a certain local area. It is considered a perfect solution to integrate renewable energy sources with loads as well as with a traditional grid. In addition, it can operate with a conventional grid, for example, by energy sourcing or a controllable load, or it can operate alone as an islanding mode to feed required electric energy to a grid. Hence, one of the important issues regarding the µgrid is the constant power load that results from the tightly designed control when it is applied to power electronic converters. The effect of CPL is incremental negative resistance that impacts the power quality of a power system and makes it at negative damping. Also, in this paper, a comprehensive study on major control and compensation techniques for µgrid has been included to face the instability effects of constant power loads. Finally, the merits and limitations of the compensation techniques are discussed.

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Section: Feedback Linearizationmentioning

confidence: 99%

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

et al. 2017

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“…Because Manuscript R. Ortega is with LSS/CNRS/CentraleSupélec, 3, Rue Joliot-Curie 91192 Gif-Sur-Yvette, France, (e-mail: romeo.ortega@lss.supelec.fr). R. Ortega is also with the ITMO University, Kronverkskiy Prospekt, 49, Sankt-Peterburg, Russia, 197101. of this, the existence of CPLs may affect the dynamic behavior of the power system and even could induce erratic or unstable behavior [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Voltage Regulation in Buck–Boost Converters Feeding an Unknown Constant Power Load: An Adaptive Passivity-Based Control

Soriano-Rangel¹,

Mancilla–David³

et al. 2021

IEEE Trans. Contr. Syst. Technol.

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Rapid developments in power distribution systems and renewable energy have widened the applications of dcdc buck-boost converters in dc voltage regulation. Applications include vehicular power systems, renewable energy sources that generate power at a low voltage, and dc microgrids. It is noted that the cascade-connection of converters in these applications may cause instability due to the fact that converters acting as loads have a constant power load (CPL) behavior. In this paper, the output voltage regulation problem of a buck-boost converter feeding a CPL is addressed. The construction of the feedback controller is based on the interconnection and damping assignment control technique. Additionally, an immersion and invariance parameter estimator is proposed to compute online the extracted load power, which is difficult to measure in practical applications. It is ensured through the design that the desired operating point is (locally) asymptotically stable with a guaranteed domain of attraction. The approach is validated via computer simulations and experimental prototyping.

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“…While the results are clearly examined, the method employed are not presented in a manner that is comprehensive enough to reapply them to other systems. Other works related to the µ approach deal with µ sensitivity or the design of a robust controller as opposed to the robust stability of PE systems [18], [40], [41], [42], [43].…”

Section: Introductionmentioning

confidence: 99%

Robust Stability Analysis of a DC/DC Buck Converter Under Multiple Parametric Uncertainties

Sumsurooah

Odavić

Bozhko

et al. 2018

IEEE Trans. Power Electron.

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Abstract-Stability studies are a crucial part of the design of power electronic systems, especially for safety critical applications. Standard methods can guarantee stability under nominal conditions but do not take into account the multiple uncertainties that are inherent in the physical system or in the system model. These uncertainties, if unaccounted for, may lead to highly optimistic or even erroneous stability margins. The structured singular value-based µ method justifiably takes into account all possible uncertainties in the system. However, the application of the µ method to power electronic systems with multiple uncertainties is not widely discussed in the literature. This work presents practical approaches to applying the µ method in the robust stability analysis of such uncertain systems. Further, it reveals the significant impact of various types of parametric uncertainties on the reliability of stability assessments of power electronic systems. This is achieved by examining the robust stability margin of the dc/dc buck converter system, when it is subject to variations in system load, line resistance, operating temperature and uncertainties in the system model. The µ predictions are supported by time domain simulation and experimental results.Index Terms-Robust stability analysis, dc/dc buck power electronic converter, Linear fractional transformation, Structured singular value, µ analysis.

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Nonlinear Control of a Buck Converter Which Feeds a Constant Power Load

Cited by 67 publications

References 31 publications

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

Voltage Regulation in Buck–Boost Converters Feeding an Unknown Constant Power Load: An Adaptive Passivity-Based Control

Robust Stability Analysis of a DC/DC Buck Converter Under Multiple Parametric Uncertainties

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