Unnikrishnan Raveendran Nair

Unnikrishnan Raveendran Nair
Institute of Robotics and Industrial Informatics · Faculty of Engineering

Master of Science

About

12
Publications
2,757
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99
Citations
Citations since 2017
10 Research Items
99 Citations
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Publications

Publications (12)
Article
Full-text available
Energy storage systems (ESS) are being considered to overcome issues in modern grids, caused by increasing penetration of renewable generation. Nevertheless, integration of ESS should also be supplemented with an optimal energy management framework to ensure maximum benefits from ESS. Conventional energy management of battery, used with PV system,...
Article
Full-text available
Model predictive control (MPC) facilitates online optimal resource scheduling in electrical networks, thermal systems, water networks, process industry to name a few. In electrical systems, the capability of MPC can be used not only to minimise operating costs but also to improve renewable energy utilisation and energy storage system degradation. T...
Article
Full-text available
Increasing integration of photovoltaic (PV) system in electric grids cause congestion during peak power feed-in. Battery storage in PV systems increases self-consumption, for consumer's benefit. However with conventional maximising self consumption (MSC) control for battery scheduling, the issue of grid congestion is not addressed. The batteries te...
Article
Full-text available
Power converters in grid connected systems are required to have fast response to ensure the stability of the system. The standard PI controllers used in most power converters are capable of fast response but with significant overshoot. In this paper a hybrid control technique for power converter using a reset PI+CI controller is proposed. The PI+CI...
Conference Paper
Wide bandgap (WBG) power electronic devices realized using silicon carbide(SiC) and gallium nitride (GaN) are increasingly replacing their silicon(Si) counterparts in power electronics applications. The obvious advantages of these devices with their higher switching speeds, lower on state resistance and high temperature operation over Si devices ha...
Conference Paper
Full-text available
The goal of this work is to apply the framework of reset systems, in particular PI+CI controllers, in the controller design for power converters. While the PI+CI controller has been applied in several industrial applications, the application of such controllers in fast electrical systems especially power electronic converters appears to be new. The...
Conference Paper
Full-text available
Industrial processes are still relying on high frequency converters based on vacuum tubes. Emerging silicon carbide semiconductor devices have potential to replace vacuum tubes and bring benefits for converters in the high frequency range. At high switching frequencies hard-switched gate drivers can enable high power density design, but suffer from...
Conference Paper
Full-text available
Hybrid controllers are capable of improved performance over their linear counterparts. In particular, reset controllers like the PI+CI are capable of fast flat response for lag dominant plants. Grid connected power converters especially interfacing energy storage systems to grids are required to have fast response to varying load demands to ensure...
Conference Paper
Resonant converters which have high power density are highly sensitive to tank circuit tuning. The Class E converter prototype developed in this work shows the detrimental effects that arise with stray components during load connection and thus proposes a test circuit which minimizes its effect on the tank circuit tuning. The experimental results o...

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Projects

Projects (2)
Project
INCITE is Marie Sklodowska-Curie European Training Network (ITN-ETN) funded by the HORIZON 2020 Programme that brings together experts on control and power systems, from academia and industry with the aim of training fourteen young researchers capable of providing innovative control solutions for the future electrical networks. New smart meters, distributed generation, renewable energy sources and the concern about the environment are redefining electrical networks. Now, both consumers and generators are active agents, capable of coordinating the power exchange in the electrical grids depending on multiple factors. To take full advantage of the new electrical networks, it is necessary a coordinated and harmonic interaction of the all actors in the network. Control algorithms are intended for this purpose; to act at several levels to conduct the electrical power exchange and improve efficiency, reliability and resilience of the network. INCITE seeks new control algorithms with an integral view of the future electrical networks, covering aspects like energy management, stability of electrical variables, monitoring and communication implementation, energy storage, among others. http://www.incite-itn.eu