Now showing items 1-10 of 26
A comparison of bio-inspired optimization methodologies applied to the tuning of industrial controllers
A comparison of different bio-inspired methods is presented for the problem of tuning the parameters of a PID industrial controller for second order plus time delay plants. The compared algorithms are representative of ...
Integration of Open Source Tools for Studying Large-Scale Distribution Networks
The penetration of Low Carbon Technologies (LCTs) is expected to increase in the near future given the attractive incentives from governments, the cost-effectiveness of the technologies and the appearance of Smart Grid ...
Reactive Power Limits in Distributed Generators from Generic Capability Curves
This paper presents a generic trapezoid-type capability curve for any distributed generation technology. This curve is used to estimate the machine reactive power limits in terms of the actual active power and terminal ...
Estimation of Lost Voltage Measurements in Distribution Networks
Estimación de medicines de tensión perdidas en redes de distribución
This paper presents an algorithm to estimate lost bus voltage measurements in balanced distribution networks regulated by centralized control schemes. The objective is to feed controllers with reliable estimations of lost ...
OpenDSS-Based Distribution Network Analyzer in Open Source GIS Environment
The adoption of low carbon technologies (e.g., photovoltaic systems) is expected to increase in the near future given their contribution to reduce greenhouse gas emissions. However, high penetrations of these new technologies ...
Multi-objective optimal tuning of two degrees of freedom PID controllers using the ENNC method
In this paper the Enhanced Normalized Normal Constrained method is applied to find the optimal tuning of second order PID controllers. This tuning takes into account both the servo and regulatory modes simultaneously, as ...
Resolution improvements on poly(methyl methacrylate) as electron-beam resist
(San José, Costa Rica, 2012-10-23)
The present thesis expands the topic of lithographic resolution improvement of poly(methyl methacrylate) (PMMA) as a positive tone electron-beam resist. The investigation used electron-beam lithography (EBL) to define ...