The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents the impact of environmental variables on the rating of a transmission line of Colombia and the energy dispatch of a system with overloaded lines. The IEEE Std. 738-2012, a method of calculation regarding Dynamic Line Rating (DLR), was programmed in LAB+i. Two analyses were conducted; these show differences in calculations when using DLR and static line rating (SLR). In the first...
The introduction of Smart Grids elements into electric power distribution and market systems poses new challenges and opportunities to meet demand of end users. To properly incorporate these technologies into the electricity sector in Colombia, actors need to increase research capabilities, develop and implement technologies, test them through pilot projects under local conditions and adjust the current...
This paper discusses the impact of dynamic line rating (henceforth DLR) of transmission lines on power flow of the Colombian National Interconnected System (SIN, in Spanish), specifically in the Department of Cundinamarca. Input data were meteorological values as angle of wind, wind speed and environmental temperature. DLR was implemented on National Laboratory of Smart Grids, LAB-i, on Bogotá Campus...
The main purpose of this paper is to introduce the development of a simulation model in order to evaluate the impact of massive recharge of Electrical Vehicles (EVs) on distribution networks in Bogotá, Colombia, taking into account specific EVs user behavior scenarios. EVs recharge is characterized and represented by software models based on EVs test measures and existing distribution networks topologies...
Electric mobility is the answer to the current problems associated with transport as inefficiency and pollution; however autonomy presents difficulties due to the low energy storage capacity of batteries. In that way, it is necessary to optimize the performance of electric vehicles in a city considering the factors that could affect it. In road tests of EVs in other cities it has been established...
This paper describes the design and implementation of the National Laboratory of Smart Grids in the University Campus (LAB+i) with the real-time integration of electricity, water and/or gas systems through six layers of Smart Grids that allow to make measurement of a process, local or remote communication in order to be integrated to the supervision and management system. Likewise in the following...
This article presents a methodology for efficiency and performance evaluation in electric vehicles (EVs) in different segments (cars, motorbikes, bicycles and vehicles for massive transportation), that allows to characterize its real behavior in Bogotá, where the performance is affected by local conditions, such as weather, geography, driving and culture. The methodology includes a procedure which...
This paper presents the losses characterization on distribution transformers windings. The losses are determined through the Frequency Response Analysis (FRA), using the Finite Element Method (FEM). The losses on the windings are evaluated on a frequency range established from 100Hz to 2MHz for a specific transformer. Finally, a methodology is proposed, that can be applied to different transformers.
This paper presents the losses characterization on distribution transformers windings. The losses are determined through the Frequency Response Analysis (FRA), using the Finite Element Method (FEM). The losses on the windings are evaluated on a frequency range established from 100Hz to 2MHz for a specific transformer. Finally, a methodology is proposed, that can be applied to different transformers.
This paper proposes a new model for electric energy production, using physical workout that is done daily in spinning bicycles and elliptical trainers in gyms. Two gyms were visited and the kinetic energy generated for the machines was evaluated in order to determine the most efficient machine and the amount of energy the machine can produce. Having the machine design, the next step is to simulate...
This paper presents a procedure to measure the efficiency on a induction motor fed by a frequency inverter. The article describes the procedure, instrumentation precision requirements described by international standards, the research for an accurate data measurement, information processing, power calculations and also efficiency calculations. The paper also describes and analyzes the different power...
This paper presents and analyzed short circuit failures for permanent magnet synchronous motor (PMSM). The study includes stated state and dynamic condition for experimental test. The stator current is analyzed by means of Hilbert-Huang transform (HHT) and energy spectrum.
This paper presents and analyzed short circuit failures for permanent magnet synchronous motor (PMSM). The study includes stated and dynamic condition for experimental and simulation test. The stator current is analyzed by means of higher order spectral analysis (HOSA). HOSA techniques are used for stator current analysis under stable conditions is power frequency spectrum density (PSD); and multiple...
This paper presents a study of the permanent magnet synchronous machine (PMSM) running under bearing damage. To carry out the study a two-dimensional (2-D) Finite Element Analysis (FEA) is used. Stator current induced harmonics for fault condition were investigated. Advanced signal analysis by means of continuous and discrete wavelet transforms was performed. Simulation were carried out and compared...
This paper presents a study of the permanent magnet synchronous motor (PMSM) running under demagnetization. The simulation has been carried out by means of two dimensional (2-D) finite element analysis (FEA), and simulations results were compared with experimental results. The demagnetization fault is analyzed by means of decomposition of stator currents obtained at different speeds for torque change.
This paper presents a rigorous model to simultaneously solving the mechanic and electromagnetic coupled differential equations which govern the dynamic response of the contactor. The model is validated with data obtained experimentally and therefore the accuracy of the model is validated. On the other hand, an estimator of the position and the velocity of the contacts, as well as of the moving core...
This paper presents permanent magnet synchronous machines with short circuit of turns. Two-dimensional (2-D) finite element analysis (FEA) is used to simulation of PMSM under fault. PMSM is working at nominal condition and speed change of 5000 rpm. Relationships between stator-current-induced harmonics were investigated by means of Fourier (FFT) and discrete wavelet transforms (DWT). The simulation...
This paper presents and analyzes short circuit failures for Permanent Magnet Synchronous Motor (PMSM). The study includes stable condition and speed transients in simulation and realistic experimental conditions. The stator current is analyzed by the empirical mode decomposition (EMD) method, which will generate a collection of intrinsic mode functions (IMF). Finally, the Hilbert-Huang transform (HHT)...
This paper presents the study of permanent magnet synchronous machines (PMSM) running with eccentricity and bearings damage. The objective is to detect and identify the fault through the current signature analysis. The stator current has been analyzed by means of both Fourier (FFT) and Discrete Wavelet (DWT) transforms. Simulations have been carried out with a two-dimensional (2-D) finite element...
This paper presents a study of a permanent magnet synchronous machine (PMSM) running under demagnetization. The demagnetization fault is analyzed through stator currents analysis and processing tools at different speeds. Advanced signal analysis by means of wavelet transforms is presented. Simulations were carried out by using two dimensional (2-D) finite element analysis (FEA), and result were compared...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.