Proceedings ArticleDOI
Voltage regulation and stabilization of DC/DC buck converter under constant power loading
Suresh Singh,Deepak Fulwani +1 more
- pp 1-6
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TLDR
In this article, a sliding mode controller is proposed which ensures supply of constant power demanded by the CPL and tight voltage regulation (error less than 0.1 V) of the output voltage.Abstract:
The low and medium voltage renewable energy based dc distribution systems are catching increased attention world-wide due to their inherent benefits over ac systems. Higher efficiency, simple control, more suitable for integration of the sources producing dc power, are some of the main benefits of the dc systems. However, these systems are prone to serious stability issues caused by the constant power load (CPL) nature of the point-of-load converters (POLs). This paper deals with the stabilization and voltage regulation of dc/dc buck converter feeding a combination of the constant voltage resistive load (CVL) and CPL in a dc micro-grid application. A sliding mode controller is proposed which ensures supply of constant power demanded by the CPL and tight voltage regulation (error less than 0.1 V) of the output voltage. The effectiveness of the controller is validated through simulation results under different operating conditions. It is shown that the controller is robust to the large changes in supply voltage and the load.read more
Citations
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Proceedings ArticleDOI
DC bus voltage regulation in the presence of constant power load using sliding mode controlled dc-dc Bi-directional converter interfaced storage unit
TL;DR: A robust sliding mode controller for a dc/dc, bidirectional converter interfacing storage unit to ensure dc bus voltage regulation in a stand-alone dc microgrid is presented in this paper.
Journal ArticleDOI
Second-order sliding mode controller design of buck converter with constant power load
Orhan Kaplan,Ferhat Bodur +1 more
TL;DR: In this paper , the authors proposed a super twisting-based second-order sliding mode control (SOSMC) for regulating the output voltage of a DC/DC buck converter feeding CPL.
Journal ArticleDOI
Emulating DC constant power load: a robust sliding mode control approach
TL;DR: In this article, an emulation of a programmable power electronic, constant power load (CPL) using a dc/dc step-up (boost) converter is presented, which is controlled by a robust sliding mode controller (SMC).
Journal ArticleDOI
On the Use of Nonlinear Inductor to Enhance the Stability of DC Distribution Networks
Ruihua Shen,Henry Shu-Hung Chung +1 more
TL;DR: In this paper , the authors proposed to use an output filter with a nonlinear inductor in the converter to enhance small signal and large signal stabilities in a downscaled dc distribution network.
References
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Book
Sliding Modes and their Application in Variable Structure Systems
TL;DR: An electric dynamically operated storage element comprises two energy stores and circuitry is provided for applying periodically repeating phase clock pulses simultaneously to the energy stores through the charging circuits.
Journal ArticleDOI
Constant power loads and negative impedance instability in automotive systems: definition, modeling, stability, and control of power electronic converters and motor drives
TL;DR: Sliding-mode and feedback linearization techniques along with large-signal phase plane analysis are presented as methods to analyze, control, and stabilize automotive converters/systems operating with CPLs.
Book
Control systems of variable structure
TL;DR: This book is referred to read because it is an inspiring book to give you more chance to get experiences and also thoughts and this is not only this control systems of variable structure.
Journal ArticleDOI
Dynamic Behavior and Stabilization of DC Microgrids With Instantaneous Constant-Power Loads
TL;DR: In this article, stability issues in dc microgrids with instantaneous constant-power loads (CPLs) are explored and mitigation strategies such as load shedding, adding resistive loads, filters, or energy storage directly connected to the main bus, and control methods are investigated.
Journal ArticleDOI
A Sliding-Mode Duty-Ratio Controller for DC/DC Buck Converters With Constant Power Loads
Yue Zhao,Wei Qiao,Daihyun Ha +2 more
TL;DR: In this paper, a slidingmode duty-ratio controller (SMDC) is proposed for dc/dc buck converters with constant power loads, which is able to stabilize the dc power systems over the entire operating range in the presence of significant variations in the load power and input voltage.