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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Journal ArticleDOI
Large Signal Stability Analysis Tools in DC Power Systems With Constant Power Loads and Variable Power Loads—A Review
TL;DR: In this paper, the authors present tools allowing large signal stability analysis of a dc power system, which allows estimation of the domain of attraction of the system operating point, and the impact of the load dynamics on stability is also studied.
Journal ArticleDOI
PWM-Based Adaptive Sliding-Mode Control for Boost DC–DC Converters
Said Oucheriah,Liping Guo +1 more
TL;DR: A robust adaptive sliding-mode controller is designed for a boost converter with an unknown resistive load and external input voltage, and the robustness of the adaptive controller to input voltage and load uncertainties and variations is tested experimentally.
Journal ArticleDOI
Design of Voltage Tracking Control for DC–DC Boost Converter Via Total Sliding-Mode Technique
Rong-Jong Wai,Li-Chung Shih +1 more
TL;DR: The effectiveness of the proposed TSMC scheme is verified by numerical simulations and realistic experimentations, and the advantages of good transient response and robustness to uncertainties are indicated in comparison with a conventional proportional-integral control system and a CSMC scheme.
Journal ArticleDOI
Linear Active Stabilization of Converter-Dominated DC Microgrids
TL;DR: Three simple and computationally efficient active damping solutions that can be implemented to stabilize a controlled voltage-source converter (VSC) interfacing a dc- microgrid to an ac system are proposed.
Journal ArticleDOI
Large-Signal Stabilization of a DC-Link Supplying a Constant Power Load Using a Virtual Capacitor: Impact on the Domain of Attraction
TL;DR: In this article, a large-signal stability study and stabilization of an electrical system containing a dc power supply, an LC filter, and a CPL was performed by a voltage source inverter supplying a motor drive.