A5077097675- Microgrid Control and Optimization
- Power Systems Fault Detection
- Islanding Detection in Power Systems
- Power Transformer Diagnostics and Insulation
- Smart Grid Energy Management
- Power Quality and Harmonics
- Optimal Power Flow Distribution
- High voltage insulation and dielectric phenomena
- Electrical Fault Detection and Protection
- Machine Fault Diagnosis Techniques
- Hydraulic and Pneumatic Systems
- Wind Energy Research and Development
- Renewable energy and sustainable power systems
- Energy Load and Power Forecasting
- Fault Detection and Control Systems
- Electric Power System Optimization
- Energy and Environment Impacts
- Gear and Bearing Dynamics Analysis
- Power System Optimization and Stability
- HVDC Systems and Fault Protection
- Water Resource Management and Quality
- Quality and Safety in Healthcare
- Integrated Energy Systems Optimization
- Drilling and Well Engineering
- Hybrid Renewable Energy Systems
Universidad de Costa Rica
2013-2024
Instituto Tecnológico de Costa Rica
2022
University of Chile
2013-2018
This paper presents both an extensive literature review and a qualitative quantitative study conducted on nearly 200 publications from the last six years (based international experience top-down analysis framework with five classification levels) to establish main trends in field of centralized energy management systems (EMS) for microgrids. No systematic trend analyses have been observed this previous reviews. EMS attributes several features such as objective functions, resolution...
The World Bank, one of the most important supporters rural electrification projects, estimates that approximately 1.2 billion people do not have regular access to electricity. In Latin America as a whole, according International Energy Agency, rate has reached 92.3% but still leaves 33.8 million without electricity (see Figure 1). They live mostly in and isolated areas are often neglected by projects due high associated costs technical difficulties.
The development of a proper protection system is essential for the secure and reliable operation microgrids. In this paper, novel adaptive microgrids presented. scheme based on protective device that includes two directional elements which are operating in an interleaved manner, namely overcurrent undervoltage elements. proposed can be implemented microprocessor-based relays. To define settings device, robust programming approach was considering finite set fault scenarios. scenarios...
The increasing integration of renewable energy sources into current power systems has posed the challenge adequately representing statistical properties associated with their variable generation. In this paper, a novel procedure is proposed to select proper synthetic time series generation model for analyze system problems. takes advantage objective specific analysis be performed and characteristics available series. aim determine suitable used generating sources. A set indicators verify...
The task of electrifying isolated zones involves several requirements that must be attended. One option to fulfil this is by using microgrids energize typically disconnected from the main grid. high penetration variable energy resources and their corresponding power-electronics-based interfaces make operating conditions considerably different than large-scale power systems. Consequently, one most important challenges design protection system, i.e., traditional schemes should rethought...
The development of a proper protection system is essential for the secure and reliable operation microgrids. In microgrid, operating conditions that produce limited magnitudes fault currents will be insufficient to activate overcurrent protective devices. Therefore, it necessary propose new systems its safe operation. this work, methodology optimal coordination devices based in robust optimization proposed. This proposal uses device on combined action undervoltage elements, which are an...
The development of proper condition monitoring routines is essential for the secure and reliable operation industrial induction motors, either low or medium voltage motors. In an motor, possible to develop a series testing evaluate its insulation system. system motor subjected various stresses, which degrades their characteristics day. Therefore, key guide decision making by those in charge operation. this work, new methodology motors based health index proposed. This proposal uses on...
The development of a proper monitoring condition power transformers is essential for the secure and reliable operation electric systems. In transformer, health influenced by multiple factors including chemical, electrical mechanical stresses. Therefore, it will be necessary to propose new tools evaluate transformers. This paper proposes index (HI) assessment HI divided into two sub-indices, which determine overall using series off-line tests frequently performed. Firstly, functional...
The use of methodologies for condition monitoring rotating machines has been growing to reduce unplanned downtime and increase the reliability industrial processes. companies must select a correct maintenance strategy follow evolution machines. Condition is collection data related health status machine it widely studied so far. Different have developed identify specific behaviors in induction motors. This paper proposes methodology bearing failure detection by using vibrations data, based on...
Rotating electric machines with operating voltage greater than 12 [kV] are an integral part of the installed base generators in different countries. These voltages incorporate new challenges to be solved maintenance practices. One most important is identification condition stator winding. For many years, commonly used monitoring techniques electrical were off-line insulation measurements, especially direct current. More recently, use on-line has enabled problems detected advance, such as...
This document presents a general guide to imple-ment modified IEEE standard distribution test feeder with high penetration of distributed generation DG, using the OPAL-RT HYPERSIM simulation platform, which allows synchronized measurements compatible C.37-118 protocol. Through phasor measurement units (PMUs) real-time monitoring specific power system nodes by directly measuring voltage and current phasors is realized. Once bus operational, it proposed develop software interfaces that allow...
The interest of companies in reducing their energy consumption has been latent recent years, and Costa Rica is no exception. In this case, the government established different policies aiming for reduction costs industry sector; however, method reaching goal not clear. Hence, paper we propose a methodology, from an electrical point view, conducting audits, specifically small office buildings (those which up to 200,000 kWh per year). proposed considers aspects include: intention carrying out...
Today, power systems face new challenges in different fields, such as economic, social, environmental and technical. In the technical field, a number of issues related to protection are recognized, due inclusion distributed generation microgrids, among other aspects. This paper presents novel laboratory experience aimed at university students, with objective understanding operation limitations that traditional today. is part learning process Micro-grid Distributed Generation course,...