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RESEARCH PRODUCT

Event-Triggered Nonlinear Control of OWC Ocean Wave Energy Plant

Sunil Kumar MishraNand KishorShubhi Purwar

subject

Lyapunov stabilityRenewable Energy Sustainability and the EnvironmentControl theoryComputer science020209 energy0202 electrical engineering electronic engineering information engineeringOscillating Water ColumnTorque02 engineering and technologyNonlinear controlTurbineWells turbinePower (physics)

description

This paper presents event-triggered nonlinear controllers for oscillating water column (OWC) ocean wave energy plant. The study is based on event-triggered backstepping controller (ET-BSC) and event-triggered sliding mode controller (ET-SMC) to control the rotational speed of an OWC turbine coupled to a generator. The designed controllers are capable to avoid the stalling of the Wells turbine so as to maximize its output power. The aim of event-triggered control is to minimize the control updates, thus providing efficient utilization of resources without compromising the OWC performance. In this regard, aperiodic sampling has been applied using an event-triggering rule derived from Lyapunov stability analysis. In order to validate the proposed controllers, simulation results have been performed using a JONSWAP irregular wave model. It is observed that performance of the ET-BSC is better than the ET-SMC in terms of defined indices, control effort, and inter-event execution time.

yearjournalcountryeditionlanguage
2018-10-01IEEE Transactions on Sustainable Energy
https://doi.org/10.1109/tste.2018.2811642