Proceedings ArticleDOI
On design of a robust controller to mitigate CPL effect — A DC micro-grid application
Suresh Singh,Deepak Fulwani +1 more
- pp 448-454
TLDR
In this article, a sliding-mode controller with a non-linear sliding surface is proposed to ensure large signal stability in DC micro-grid, which is able to mitigate CPL effect of tightly regulated POLs and ensure stable operation of DC microgrid under various disturbances.Abstract:
It has been an established fact that the presence of Constant Power Load (CPL) in DC micro-grid causes instability as it has negative impedance characteristic. This poses a serious challenge for the stability of the DC micro-grid in spite of ensuring stability of individual converters. Some efforts are made by the community to address the issue. In this paper, we have proposed a sliding-mode controller with a non-linear sliding surface to ensure large signal stability. The proposed non-linear surface ensures that constant power is maintained by the converter. The proposed controller is able to mitigate CPL effect of tightly regulated POLs and ensures stable operation of DC micro-grid under various disturbances. Proposed controller is implemented on a typical DC micro-grid feeding a CPL. The theoretical development is verified through simulations in MATLAB Simulink environment.read more
Citations
More filters
Journal ArticleDOI
Robust sliding-mode control of dc/dc boost converter feeding a constant power load
TL;DR: In this article, a robust pulse-width modulation-based sliding-mode controller for a dc/dc boost converter feeding the CPL in a typical dc microgrid scenario is proposed which ensures constant power to be delivered to the load.
Journal ArticleDOI
Constant power loads and their effects in DC distributed power systems: A review
TL;DR: In this paper, the authors present state-of-the-art and research needs in dc distributed power systems in one article, and a review of stability criteria used to study the stability of dc power systems are reviewed with their merits and limitations.
Journal ArticleDOI
Numerical Approximation of the Maximum Power Consumption in DC-MGs With CPLs via an SDP Model
TL;DR: This brief addresses the numerical approximation of the maximum power consumption in direct-current microgrids (DC-MGs) with constant power loads through a convex optimizing model through a semidefinite programming model.
Journal ArticleDOI
Sliding Mode Controller and Lyapunov Redesign Controller to Improve Microgrid Stability: A Comparative Analysis with CPL Power Variation
Eklas Hossain,Ronald A. Perez,Sanjeevikumar Padmanaban,Lucian Mihet-Popa,Frede Blaabjerg,Vigna K. Ramachandaramurthy +5 more
TL;DR: In this paper, a storage based load side compensation technique is used to enhance stability of micro-grids, and two nonlinear control techniques, Sliding Mode Controller (SMC) and Lyapunov Redesign Controller (LRC), are individually implemented to control microgrid system stability with desired robustness.
Proceedings ArticleDOI
Constant power loads: A solution using sliding mode control
Suresh Singh,Deepak Fulwani +1 more
TL;DR: A sliding-mode controller with a non-linear sliding surface to mitigate negative impedance instabilities caused by the CPLs in dc distribution systems (dc Micro-grids) and ensures stable operation of dc micro-grid system under various disturbances is proposed.
References
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Proceedings ArticleDOI
Large signal stability criteria for distributed systems with constant power loads
TL;DR: In this paper, design oriented criteria are developed for distributed power systems with constant power loads to guarantee stability during large disturbances, where design constraints on the input filter parameters, such as the Q factor, and the amount of "ideal" constant power load that a system can support are placed.
Journal ArticleDOI
Linear Stabilization of a DC Bus Supplying a Constant Power Load: A General Design Approach
Pisit Liutanakul,Ahmed Bilal Awan,Serge Pierfederici,Babak Nahid-Mobarakeh,Farid Meibody-Tabar +4 more
TL;DR: In this paper, an oscillation compensation technique is proposed to improve the stability margin of an electrical system constituted by a dc power supply, an LC filter, and a constant power load.
Journal ArticleDOI
Stability Criterion for Cascaded System With Constant Power Load
TL;DR: Based on the Lyapunov linearization method and the mixed potential theory, stability of equilibrium point and an estimation of the region of attraction are investigated for cascaded system in the dc distribution power system as mentioned in this paper.
Journal ArticleDOI
Implementation of pulse-width-modulation based sliding mode controller for boost converters
TL;DR: In this article, the implementation of a PWM-based sliding mode (SM) controller for boost converters is discussed and the methods of modeling the system and translation of the SM control equations for the PWM implementation are illustrated.
Journal ArticleDOI
Amplitude Death Solutions for Stabilization of DC Microgrids With Instantaneous Constant-Power Loads
TL;DR: In this article, amplitude death is applied to the stabilization problem in this constant-power setting and two amplitude death methods, one using delay and the other using circuit heterogeneity, are examined through numerical simulations.