Browsing by Author "Tedeschi, E."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Centralized control of a wave energy farm(2012-04) Santos, M.; Salcedo, F.; Tedeschi, E.; Robles, E.; Villate, J. L.; POWER SYSTEMS; RENOVABLES OFFSHORE; GENERALAs long as an increased number of Wave Energy Converters are reaching their prototypal and pre-commercial stage it is fundamental to analyse in detail the issues arising from the grid integration of such devices. Point absorbers are among the most promising Wave Energy Converters. In this paper a point absorbers wave farm, connected to a weak grid, is simulated in order to evaluate how active and reactive power control strategies can help to fulfil the grid codes and to improve the behaviour of the farm as well as the efficiency of the internal grid. The real test case offered by bimep is used to model the internal grid of the farm. Different farm level control strategies, centralized and decentralized, are considered and compared. Both steady-state and dynamic analyses are carried out in order to assess the performance of the farm under its nominal operation and also to underline the detrimental effect of the energy source intermittency. Fault analyses are performed to evaluate the effect of voltage dips on the system operation.Item Grid connection improvements by control strategy selection for wave energy converters(2011-05) Santos, M.; Tedeschi, E.; Ricci, P.; Molinas, M.; Martin, J. L.; POWER SYSTEMSIn this paper a wave-to-wire approach to model the exploitation of ocean energy by point absorbers in heave is presented. Attention is focused on the impact that the control strategy of the Wave Energy Converter (WEC) has both on the power performance of the single device and on the grid power quality at the connection point, when point absorbers are arranged in wave farms. Two different control strategies are proposed and compared to theoretical ones such as the complex-conjugate method. Their effectiveness in improving the system overall power extraction while reducing each Power Take-Off’s rating and easing the Wave Farm grid integration is proved by time domain simulations, developed both at single-device level and at farm level.