Browsing by Author "Madichetty, S."

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A Multi-Level Control and Optimization Scheme for Islanded PV Based Microgrid: A Control Frame Work
(IEEE Electron Devices Society eds@ieee.org, 2019) Mathew, P.; Madichetty, S.; Mishra, S.
This paper proposes a multi-level control and optimization scheme, including grid control and node control, for an islanded 48-V PV-based low-voltage dc (LVdc) microgrid that aims to overcome the drawbacks of centralized and decentralized control schemes. The analyzed microgrid includes a 20-kW rooftop solar system as the main power source with distributed compensation systems. The central supervisory controller is responsible for updating grid characteristics and sending/receiving information to/from local node controllers, which are responsible for bus voltage regulation and energy management. The control hierarchy features optimized and safe operation (charge and discharge) of storage devices in dc microgrids. The paper also demonstrates the application of battery-supercapacitor systems to absorb system transients during load changes. The simulation showcases the continuous flow of information and decision processes via each level of control, while simultaneously taking the constraints of each subsystem into consideration. The scheme has been simulated in MATLAB/Simulink environment for various case studies to evaluate system stability and robustness. Further, the proposed scheme has been tested experimentally with its prototype and its results are explored. © 2011-2012 IEEE.
A Multilevel Distributed Hybrid Control Scheme for Islanded DC Microgrids
(Institute of Electrical and Electronics Engineers Inc., 2019) Mathew, P.; Madichetty, S.; Mishra, S.
This paper proposes a multilevel hybrid control scheme, including grid control and node control, for an islanded 48-V solar photovoltaic-based low voltage dc microgrid that aims to overcome the drawbacks of centralized and decentralized control schemes. The analyzed microgrid includes a 35-kW rooftop solar system as the main power source at bus-1 with battery storage, 5-kW hybrid energy storage system (Vanadium Redox flow battery with super capacitor) at bus-2, and variable loads such as electrical vehicles at bus-3. In the case of a central failure, the proposed hybrid control scheme is capable of seamlessly switching between high bandwidth communication and low bandwidth communication channels of communications to implement a distributed control scheme. The central supervisory controller is responsible for updation of grid characteristics and sending/receiving information to/from local node controllers, which are responsible for bus voltage regulation and energy management. The control hierarchy features optimized and safe operation (charge and discharge) of storage devices in dc microgrids. The paper also demonstrates the application of battery-supercapacitor systems to absorb system transients during load changes. The simulation showcases the continuous flow of information and decision processes via each level of control while simultaneously taking into consideration the constraints of each subsystem. The scheme has been simulated in MATLAB/Simulink environment for various case studies to evaluate system robustness. Further, the proposed scheme has been tested experimentally with its prototype and its results are explored. © 2007-2012 IEEE.
Output voltage control of DC-DC boost converter using model predictive control approach
(2018) Khunte, K.V.; Madichetty, S.; Mishra, S.
This article contains an approach to control the output voltage of dc-dc boost converter using model predictive control algorithm. State space modeling of a boost converter is done for both continuous and discontinuous conduction mode. By implementing online optimization and constraint satisfaction it produces a control input which regulates the output terminal voltage to its given reference. Disturbances produced due to load variation at output terminal are taken care of by an observer which is implemented by using kalman state estimator. Simulations are carried out on Simulink-MATLAB platform to examine the merits of proposed strategy, which includes fast transient response and robustness. � 2018 IEEE.
Output voltage control of DC-DC boost converter using model predictive control approach
(Institute of Electrical and Electronics Engineers Inc., 2018) Khunte, K.V.; Madichetty, S.; Mishra, S.
This article contains an approach to control the output voltage of dc-dc boost converter using model predictive control algorithm. State space modeling of a boost converter is done for both continuous and discontinuous conduction mode. By implementing online optimization and constraint satisfaction it produces a control input which regulates the output terminal voltage to its given reference. Disturbances produced due to load variation at output terminal are taken care of by an observer which is implemented by using kalman state estimator. Simulations are carried out on Simulink-MATLAB platform to examine the merits of proposed strategy, which includes fast transient response and robustness. Â© 2018 IEEE.