Enrique C. Quispe

Universidad Autónoma de Occidente | UAdeO · Depto. Energética y Mecánica

This article evaluates energy quality in individual circuits within an industrial electrical system and its impact on common connection point parameters. The research is crucial due to rising challenges in power quality arising from increased nonlinear electrical loads in industrial processes. The study involves sequential steps, covering the indus...

Higher education institutions (HEIs) play a fundamental role in sustainability, promoters of innovation, science, and technology. Therefore, every day more institutions are joining the fight against global warming. One of the contributions of HEIs is the carbon footprint (CF) report, to implement policies and management systems to establish strateg...

El propósito de este estudio es presentar la aplicación de herramientas de gestión energética para llevar a cabo una caracterización energética de un Ingenio. Este trabajo de investigación se llevó a cabo en el marco de un proyecto industrial nacional, que recibió financiamiento de la Organización de las Naciones Unidas para el Desarrollo Industria...

This paper introduces a methodology to conduct an energy assessment at a Higher Education Institution (HEI) based on the international standard ISO 50001. This methodology was applied at the Universidad Autónoma de Occidente (UAO) in Cali, Colombia, to develop energy consumption baselines for each building and the air conditioning system of the mai...

Renewable energy and energy efficiency are essential for a transition to cleaner and sustainable energy. Photovoltaic and wind turbine systems introduce operation, control, protection, and planning issues, particularly affecting frequency stability in the grid. In contrast to more widespread wind turbines and photovoltaic systems, biomass based ele...

The copper rotor induction motor (CURIM) was recently introduced because it has lower rotor fusion losses than the aluminum rotor (ALRIM). Furthermore, with CURIM, it is easier to reach IE4 and IE5 efficiency levels. The CURIM is advantageous for compact motors, escalators, and electric vehicle applications. However, CURIMs present slip, power fact...

The ISO 50001:2018 standard establishes a standardized set of concepts and practices for energy management of industrial assets and processes, providing criteria to establish policies, processes, procedures, and tasks related to energy management to meet established energy objectives. This article presents the application of these tools in thermal...

Este libro surge en momentos donde la Inteligencia Artificial se ha convertido en una tecnología que cada vez está más presente en nuestras labores cotidianas, tiempos en los que aparecen serios cuestionamientos sobre sus beneficios. Incluso, algunos estudiosos la consideran una tecnología que puede poner en riesgo la humanidad y provocar un colaps...

This paper aims to present a simulation model for the analysis of the operational characteristics of electric motors (EMs). The model was developed on the Simulink platform of the MATLAB program and allows analysis in supply conditions with harmonics and voltage unbalance. The contribution of the model is that it considers the mechanical losses and...

Currently, the feasibility to replace standard efficiency electric motors with higher efficiency ones is assessed with considerations differing from real operating conditions in the industry. This study compares the feasibility of replacing 26 standard efficiency motors (IE1) with high-efficiency efficiency ones (IE2 and IE3) in a sugar plant, base...

This paper aims to evaluate the performance of synchronous reluctance motors assisted by a permanent magnet (PMa-SynRM) focused on efficiency and torque pulsations. PMa-SynRM shows high efficiency and power factor, compared to induction motors (IM), although they have a greater cost. These machines develop relatively high torque ripple, cogging tor...

Voltage Unbalance (VU) is one of the most common power quality problems in industrial electrical systems and it is a subject of systematic study. This problem affects the operation and the efficiency of Induction Motors (IMs), which are the loads that demand more energy in the industrial sector with around 68%. The Voltage Unbalance Factor (VUF), d...

This paper presents the application of tools to develop a procedure to estimate the energy saving potentials in a small foundry company in Colombia, based on the ISO 50001 standard. This work was carried within the framework of a national industrial project, funded by UNIDO, aimed at the small and medium industrial sector companies (SMEs) of Valle...

Este documento presenta el estudio energético realizado a una empresa de fundición de metal ubicada en el municipio de Yumbo (Valle del Cauca), con el fin de estimar el potencial de ahorro de energía. En este trabajo se utilizan técnicas de gestión de energía que permitieron plantear unas propuestas de mejoramiento del desempeño energético y calcul...

More than 65% of electricity consumed worldwide by the industrial sector is used in electric-motor-driven systems. For this reason, the efficiency of electric motors is an important factor in improving the energy efficiency of the industry. Additionally, this contributes to reducing energy consumption, production costs, as well as CO 2eq emissions....

En este libro se presenta un estudio sobre algunos de los problemas que se presentan en el análisis del desequilibrio de tensiones sobre la operación del motor de inducción trifásico. Entonces, con el objetivo de presentar esta problemática y su solución, el libro se ha estructurado de la siguiente manera: en el primer capítulo se muestra la import...

For driving constant loads in industry, the use of direct-on-line-start permanent-magnet-assisted synchronous reluctance motors with ferrite magnets (DOL-Start-PMa-SynRM) is proposed. The bibliographic search demonstrated that this new motor has greater efficiency than one similar induction motor (IM). It was evidenced that the main element that is...

This paper proposes the analysis of the effects of power electronics devices on the energy quality of an administrative building. For the study a method is applied that allows the analysis of the main problems of energy quality such as voltage variation, harmonics, flicker, and the effect of harmonics on the power factor. As a case study, the offic...

This paper proposes the analysis of the effects of power electronics devices on the energy quality of an administrative building. For the study a method is applied that allows the analysis of the main problems of energy quality such as voltage variation, harmonics, flicker, and the effect of harmonics on the power factor. As a case study, the offic...

In this paper the feasibility of energy saving by implementing flow regulation at constant load in feedwater pumps in a sugar industry is studied. As regulation strategy, the use of a variable speed drive in the hydraulic system is proposed. For the project evaluation, the Net Present Value and Payback Period techniques are used. Among the variable...

In this paper the feasibility of energy saving by implementing flow regulation at constant load in feedwater pumps in a sugar industry is studied. As regulation strategy, the use of a variable speed drive in the hydraulic system is proposed. For the project evaluation, the Net Present Value and Payback Period techniques are used. Among the variable...

La política energética acerca de la integración de planes de eficiencia energética y energías renovables tienen impactos a corto, mediano y largo plazo en la competitividad y productividad de Colombia. Este artículo construye un escenario energético entre 2017-2030 basado en planes de eficiencia energética con impacto en la curva de demanda de ener...

Resumen-This paper presents a methodology for modeling and simulation of three-phase induction machine in transient state, including the effect of magnetic saturation. The spatial vector method is used for the modeling of this machine, which makes it possible to simplify the non-linear differential equations with variable coefficients. The develope...

This paper analyzes the effects of voltage harmonic distortion on the losses and efficiency of energy efficient induction motors (EEIM). Preliminary studies show that when fed with distorted voltages the new EEIM have a greater impact on efficiency than standard induction motors. Therefore, in this work a more precise steady state equivalent circui...

The global induction motor market is moving fast towards the higher efficiency classes, such as premium efficiency (IE3) and super-premium efficiency (IE4) classes. Despite that, the existing operating motor stock is still dominated by below-standard and standard motors, since, on average, induction motors, regardless their efficiency classes, can...

A study on the fundamental characteristics, basic parameters, and some applications of permanent magnet assisted synchronous reluctance motors (PMa-SynRM), controlled by variable frequency drives (AFV) for centrifugal loads, is presented. This system facilitates savings. PMa-SynRM (considering different types of magnets), synchronous reluctance mot...

This paper presents the results of a study about the effects of unbalanced voltages on the energy performance of three-phase induction motors. The principal contribution of this paper is that presents a detailed analysis of the influence of positive and negative sequence voltage components and the angle between them on several characteristics such...

In recent years, energy and environmental crisis has driven that implement policies that promote increased energy efficiency in end-use equipment power. The electric motors driven systems (EMDS) are the biggest consumers of electricity, this has promoted the development of new technologies to increase the efficiency of electric motors. This work sh...

This paper evaluates the harmonic distortion generated by PWM motor drives in an electrical industrial system of a wheat flour mill company. For this, a comparative study between two industrial circuits connected at the same point of common coupling (PCC) with similar characteristics of load and transformers is presented. The difference is that one...

In this paper, we study the behavior of line start permanent magnet synchronous motors (LSPMSM) and squirrel cage induction motors (IM) under different voltage unbalance levels and different load conditions. To this end, we carried out different tests on a 5.5 kW, 4 pole, 1500 rpm, IE4 efficiency LSPMSM and on a 5.5 kW, 4 pole, 1475 rpm, IE4 effici...

In electric supply systems of industry and other entities, it is very common to find problems of power quality. Among these problems, unbalanced voltage is very common. In this paper, is presented the study of the effects of unbalanced voltages on the energy performance of three-phase induction motors. The main contribution of this investigation is...

The energy management of electric motors is an important part of the industrial energy management, because the electric motors consume about 70% of industrial electricity. The energy management allows reduce electricity consumption through the increase efficiency of industrial processes and reduce CO2 emissions. Knowing the cause of failure in elec...

In this paper we estimate the effect of voltage unbalance on the losses in the core of the induction motor (IM). To measure losses in the core of the stator and the rotor, we used an IM with the rotor bars removed. We propose a test to estimate the equivalent resistance of the core losses and validate the results. We analyze the core losses for two...

In this work the application of a method to estimate the shaft power of induction motors operating in the presences of unbalanced and harmonics voltages is presented. The method uses the steady state equivalent circuits, with some considerations for the analysis of motor performance, fed with unbalanced and harmonic voltages. The parameters of circ...

RESUMEN En este trabajo se analizan los efectos de la distorsión armónica de tensión en las pérdidas y el rendimiento de los motores eléctricos de inducción de alta eficiencia (EEM Energy Efficient Motors). Estudios preliminares muestran que los nuevos EEM consumen menos energía que los de eficiencia estándar en condiciones similares de suministro....

This paper presents the application of a method to determine the output power, losses, and efficiency of induction motors, working in no-controlled conditions, in the presences of unbalanced and harmonics voltages. The method uses the steady state equivalent circuits, with some considerations for the analysis of motor performance, fed with unbalanc...

This paper presents the results of a study about the effects of unbalanced voltages on the energy performance of three-phase induction motors. The principal contribution of this paper is that presents a study of the influence of positive sequence voltage on the several characteristics: line currents, losses, efficiency and power factor under differ...

The enactment of the ISO 50001 standard has led the industry to its rapid deployment in production or service processes. This process has sometimes been limited by difficulties in the proper definition of Base Line Energy. This paper addresses the process of drafting the Energy Base Line in three companies; a tourist hotel; a cement factory and an...

Se presenta un estudio sobre aplicaciones de los motores sincrónicos de reluctancia (MSR) controlados por accionamientos de frecuencia variable (AFV), que posibilitan el ahorro de energía. Se realizó una comparación entre las características constructivas de los MSR y los motores asincrónicos de jaula (MA), evaluando las ventajas y limitaciones que...

Among the most important components of the electrical systems are power transformers, whose efficiency is affected by power quality problems present in electrical power networks. One of the problems affecting the operation of the transformers is the circulation of nonsinusoidal currents in the windings when they are feeding nonlinear loads. This ca...

La eficiencia y gestión energetica son actualmente herramientas claves de la humanidad en su lucha por detener el calentamiento global y avanzar hacia un desarrollo sostenible. La aplicación de la eficiencia energetica en las empresas industriales permite reducir su consumo energético, sus costos de operación, aumentar sus utilidades, reducir sus e...

With the growing use of electronic soft-starters for starting fixed-speed three-phase squirrel-cage induction motors with a rated power higher than 4 kW, the six-terminal star/delta-connection stator windings with delta as the nominal connection, used for the typical contactor-based star-delta starting, are not mandatory. In fact, when a motor is t...

In electric power systems, it is very common to find problems of power quality. The flow of harmonics significantly affect the operation of three-phase induction motors, and its energy characterization becomes difficult. There are different methods in-situ to estimate motor efficiency. However, it is necessary to deepen in the in-situ efficiency ana...

Se presenta una metodología para cuantificar el efecto de la distorsión armónica de tensión sobre la eficiencia, el factor de potencia y la potencia del motor trifásico de inducción. La metodología usa un circuito equivalente modificado del motor de inducción que permite calcular su operación ante frecuencias armónicas. Las ecuaciones del modelo se...

This paper presents the structure, strategies and advance of the Colombian Strategic Program for Energy Management called "Programa Estratégico Nacional (PEN)-Sistema de Gestión Integral de la Energía (SGIE): PEN-SGIE". The PEN-SGIE is a joint initiative among government, university and industry and, its aim is to develop and broadcast the Integral...

This paper presents a methodology for quantify both induction motor efficiency and its power factor under non-sinusoidal conditions. The methodology uses an induction motor equivalent electric circuit, whose equations are solved with simulation using MATLAB and applying superposition principle to calculate its operation with harmonic frequencies. T...

This paper presents a study of the influence of the positive sequence voltage on the derating of three-phase induction motors under voltage unbalance and its comparison with the NEMA derating curve. Three criteria for derating induction motors under unbalanced voltages are presented: the rated current, the rated equivalent current and the rated los...

The time harmonic flow in industrial electrical grids with voltage deviations and unbalance, significantly affects three phase induction motor operation and makes difficult energy characterization. There are different methods for in situ estimation of motors efficiency. However, none of them have been sufficiently precise for the analysis under non...

The technology of energy management called "Sistema de Gestión Integral de la Energía, SGIE" was proposed in Colombia in 2007 as a result of a research project funded by the government. The SGIE technology consists of statistical and monitoring tools, energy efficiency indicators and conforms to the requirements of the Standard ISO 50001. This pape...

form only given. Rotating electrical machines are vital elements in the modern world, they generate the electrical energy used in all sectors of society, they also convert the electrical energy into mechanical power, to drive all kinds of processes where movement is required. Therefore, it is important to ensure that they operate efficiently and re...