In this study, a technical and economic comparative analysis for evaluating the performance of various electrical photovoltaic (PV) plant configurations is presented. This methodology assessment is based on a holistic approach that calculates the levelised cost of energy (LCOE) considering the capital and installation cost of the PV components, as well as, the operation and maintenance costs over the lifetime of the project. Also, the potential economic impact of the installation of batteries for providing flat-output response is investigated. Moreover, a sensitivity analysis is included for considering both economic and technical uncertainty on the LCOE. The presented methodology compares the performance of six different configurations in three hypothetical PV power plants (1, 50 and 200 MW) located in Golden, Colorado, USA. The results obtained demonstrate that although some PV power plant configurations present better efficiency (higher performance ratio), they are not the most cost-effective solutions because of the requirement of extra equipment or the inclusion of expensive technologies. Finally, the benefit of including batteries into the system is shown for flat output operation. The results show that in spite of their inclusion increases the LCOE, extra revenues can be obtained when providing such services.
In this work, a voltage source converter (VSC) is configured to perform STATCOM tasks and generate reactive power. An optimal H8 controller has been successfully implemented including an anti-windup compensator. Data from an experimental test bench is provided and compared with simulation results showing good accuracy level.
Dominguez, J.; Gomis-Bellmunt, O.; Trilla , L.; Junyent-Ferré, A. Computers & mathematics with applications Vol. 64, num. 2, p. 102-114 DOI: 10.1016/j.camwa.2012.01.021 Data de publicació: 2012-07 Article en revista
Trilla , L.; Gomis-Bellmunt, O.; Junyent-Ferré, A.; Mata, M.; Sánchez, J.; Sudria, A. IEEE Transactions on Sustainable Energy Vol. 2, num. 4, p. 509-519 DOI: 10.1109/TSTE.2011.2155685 Data de publicació: 2011-10 Article en revista
A planning framework is proposed for the task of cleaning a table and stack an unknown number of objects of different size on a tray. We propose to divide this problem in two, and combine two different planning algorithms. One, plan hand motions in the euclidean space to be able to move the hand in a noisy scenario using a novel Time-of-Flight camera (ToF) to perform the perception of the environment.
The other one, chooses the strategy to effectively clean the table, considering the symbolic position of the objects, and also its size for stacking considerations. Our formulation does not use information about the number of objects available, and thus is general in this sense. Also, it can deal with different object sizes, planning adequately to stack them. The special definition of the possible actions allows a simple and elegant way of characterizing the problem, and is one of the key ingredients of the proposed solution. Some experiments are provided in simulated and real scenarios that validate our approach.