http://hdl.handle.net/2117/4014 Thu, 23 May 2013 04:03:00 GMT 2013-05-23T04:03:00Z webmaster.bupc@upc.edu Universitat Politècnica de Catalunya. Servei de Biblioteques i Documentació no http://hdl.handle.net/2117/19373 Title: A MILP model to design hybrid wind-photovoltaic isolated rural electrification projects in developing countries Authors: Ferrer Martí, Laia; Domenech Lega, Bruno; García Villoria, Alberto; Pastor Moreno, Rafael Abstract: Electrification systems based on the use of renewable energy sources are a suitable option for providing electricity to isolated communities autonomously. Wind and hybrid wind–photovoltaic (PV) systems are increasingly getting attention. To electrify scattered communities, designs that combine individual systems and microgrids have recently proven advantageous. In this paper we present a mathematical programming model to optimize the design of hybrid wind–PV systems that solves the location of the wind–PV generators and the design of the microgrids, taking into account the demand of the consumption points and the energy potential. The criterion is the minimization of the initial investment cost required to meet the demand. The proposed hybrid model is tested with realistic size instances and results show the instances are efficiently solved. Moreover, the model is applied to real case studies in Peru; obtained results verify that the hybrid model efficiently finds solutions that significantly reduce cost. http://hdl.handle.net/2117/19373 Ferrer Martí, Laia; Domenech Lega, Bruno; García Villoria, Alberto; Pastor Moreno, Rafael no Case study, Mixed integer linear programming, OR in developing countries, Wind-photovoltaic system Electrification systems based on the use of renewable energy sources are a suitable option for providing electricity to isolated communities autonomously. Wind and hybrid wind–photovoltaic (PV) systems are increasingly getting attention. To electrify scattered communities, designs that combine individual systems and microgrids have recently proven advantageous. In this paper we present a mathematical programming model to optimize the design of hybrid wind–PV systems that solves the location of the wind–PV generators and the design of the microgrids, taking into account the demand of the consumption points and the energy potential. The criterion is the minimization of the initial investment cost required to meet the demand. The proposed hybrid model is tested with realistic size instances and results show the instances are efficiently solved. Moreover, the model is applied to real case studies in Peru; obtained results verify that the hybrid model efficiently finds solutions that significantly reduce cost. http://hdl.handle.net/2117/19371 Title: Solution methods for the double-support indeterminacy in human gait Authors: Lugrís, Urbano; Carlín, Jairo; Pàmies Vila, Rosa; Font Llagunes, Josep Maria; Cuadrado, Javier Abstract: There is a growing interest in predicting the gait motion of real subjects under virtual conditions, e.g., to anticipate the result of surgery or to help in the design of prosthetic/ orthotic devices. To this end, the motion parameters can be considered as the design parameters of an optimization problem. In this context, determination of the joint efforts for a given motion is a required step for the subsequent evaluation of cost function and constraints. In the double-support phase of gait, the ground reaction forces include twelve unknowns, rendering the inverse dynamics problem indeterminate if no force plate data are available. In this paper, several methods for solving the inverse dynamics problem of the human gait during the double-support phase, using force plates or not, are presented and compared. Wed, 22 May 2013 11:29:50 GMT http://hdl.handle.net/2117/19371 2013-05-22T11:29:50Z Lugrís, Urbano; Carlín, Jairo; Pàmies Vila, Rosa; Font Llagunes, Josep Maria; Cuadrado, Javier no There is a growing interest in predicting the gait motion of real subjects under virtual conditions, e.g., to anticipate the result of surgery or to help in the design of prosthetic/ orthotic devices. To this end, the motion parameters can be considered as the design parameters of an optimization problem. In this context, determination of the joint efforts for a given motion is a required step for the subsequent evaluation of cost function and constraints. In the double-support phase of gait, the ground reaction forces include twelve unknowns, rendering the inverse dynamics problem indeterminate if no force plate data are available. In this paper, several methods for solving the inverse dynamics problem of the human gait during the double-support phase, using force plates or not, are presented and compared. http://hdl.handle.net/2117/19361 Title: Improvement of the manufacturing process of abrasive stones for honing Authors: Buj Corral, Irene; Vivancos Calvet, Joan Abstract: In the present work, the mixing process of different components of abrasive stones of cubic boron nitride used for rough honing was studied. Stones are made by the sintering process of abrasive grains, a metallic bond, and a humectant that favors covering of each abrasive grain by the bond. Incorrect mixing of abrasive grains with the bond and humectant can result in stones with nonuniform abrasive grain distribution. As the abrasive stone wears out, grain distribution will vary and modify efficiency of the honing operation. Tin is the metal having the lowest melting point among metals in the bond. By means of a scanning electron microscope and energy-dispersive X-ray microanalysis, tin segregation was discarded, which could have led to abrasive grain segregation. Later, mixing tests of the different components of the stones were performed at different mixing times Tue, 21 May 2013 13:10:14 GMT http://hdl.handle.net/2117/19361 2013-05-21T13:10:14Z Buj Corral, Irene; Vivancos Calvet, Joan no Honing, Abrasive stone, Cubic boron nitride, Mixing In the present work, the mixing process of different components of abrasive stones of cubic boron nitride used for rough honing was studied. Stones are made by the sintering process of abrasive grains, a metallic bond, and a humectant that favors covering of each abrasive grain by the bond. Incorrect mixing of abrasive grains with the bond and humectant can result in stones with nonuniform abrasive grain distribution. As the abrasive stone wears out, grain distribution will vary and modify efficiency of the honing operation. Tin is the metal having the lowest melting point among metals in the bond. By means of a scanning electron microscope and energy-dispersive X-ray microanalysis, tin segregation was discarded, which could have led to abrasive grain segregation. Later, mixing tests of the different components of the stones were performed at different mixing times http://hdl.handle.net/2117/18732 Title: Enhancement in evaluating small group work in courses with large number of students. Machine theory at industrial engineering degrees Authors: Jordi Nebot, Lluïsa; Pàmies Vila, Rosa; Català Calderon, Pau; Puig Ortiz, Joan Tue, 09 Apr 2013 11:49:48 GMT http://hdl.handle.net/2117/18732 2013-04-09T11:49:48Z Jordi Nebot, Lluïsa; Pàmies Vila, Rosa; Català Calderon, Pau; Puig Ortiz, Joan no http://hdl.handle.net/2117/18640 Title: Micro-mechanical damage in tool steels analyzed by acoustic emission technique Authors: Picas Anfruns, Ingrid; Martínez González, Eva; Casellas, Daniel; Romeu Garbí, Jordi Abstract: The carbides in tool steels act as hard particles and dictate the wear resistance. The origin of failure of these steels is mostly related with the carbide cracking, as a nucleation site of final cracks. This paper shows the acoustic emission (AE) signals related with the nucleation (carbide cracking) and the crack growth (in the metallic matrix) during a monotonic bending test of a tool steel obtained by ingot metallurgy routes (DIN 1.2379). The paper presents a relationship between the frequency spectrum of AE signals obtained and the microscopic images during the test. Fri, 05 Apr 2013 11:01:05 GMT http://hdl.handle.net/2117/18640 2013-04-05T11:01:05Z Picas Anfruns, Ingrid; Martínez González, Eva; Casellas, Daniel; Romeu Garbí, Jordi no The carbides in tool steels act as hard particles and dictate the wear resistance. The origin of failure of these steels is mostly related with the carbide cracking, as a nucleation site of final cracks. This paper shows the acoustic emission (AE) signals related with the nucleation (carbide cracking) and the crack growth (in the metallic matrix) during a monotonic bending test of a tool steel obtained by ingot metallurgy routes (DIN 1.2379). The paper presents a relationship between the frequency spectrum of AE signals obtained and the microscopic images during the test. http://hdl.handle.net/2117/18505 Title: Valoración del daño corporal en personas afectadas de secuelas neurológicas Authors: Peña Pitarch, Esteve; Ticó Falguera, Neus Abstract: Objetivo: Mostrar un nuevo sistema para simular la recuperación inicial de las funciones de la extremidad superior los primeros días después del ictus y simular la recuperación funcional de los pacientes bajo los programas de rehabilitación. Pacientes y metodología: Seleccionamos 29 pacientes en los primeros cuatro días después de padecer un ictus, valorados a los tres y siete días y uno, tres y seis meses, recogiendo tipo de ictus, clasificación (escala de Oxford), déficit neurológico (escala de NIHSS), medidas de discapacidad, valoración de la función motora de la extremidad superior (escala de Fugl-Meyer), tono muscular y balance muscular de la extremidad superior. Resultados: Los pacientes que presentaron un tono muscular disminuido tuvieron más dificultad en mejorar el control motor de las articulaciones de la extremidad superior. Los pacientes TACI presentaron mayor déficit neurológico, mientras que los tipos de ictus POCI y LACI tenían una función motora mejor con mayor independencia para el desarrollo de sus actividades de la vida diaria. Conclusión: La simulación virtual del brazo y la mano en pacientes afectados por un ictus proporciona a los médicos y fisioterapeutas una nueva herramienta que permite simular la evolución de los déficits en algunos pacientes. Fri, 22 Mar 2013 16:16:33 GMT http://hdl.handle.net/2117/18505 2013-03-22T16:16:33Z Peña Pitarch, Esteve; Ticó Falguera, Neus no Objetivo: Mostrar un nuevo sistema para simular la recuperación inicial de las funciones de la extremidad superior los primeros días después del ictus y simular la recuperación funcional de los pacientes bajo los programas de rehabilitación. Pacientes y metodología: Seleccionamos 29 pacientes en los primeros cuatro días después de padecer un ictus, valorados a los tres y siete días y uno, tres y seis meses, recogiendo tipo de ictus, clasificación (escala de Oxford), déficit neurológico (escala de NIHSS), medidas de discapacidad, valoración de la función motora de la extremidad superior (escala de Fugl-Meyer), tono muscular y balance muscular de la extremidad superior. Resultados: Los pacientes que presentaron un tono muscular disminuido tuvieron más dificultad en mejorar el control motor de las articulaciones de la extremidad superior. Los pacientes TACI presentaron mayor déficit neurológico, mientras que los tipos de ictus POCI y LACI tenían una función motora mejor con mayor independencia para el desarrollo de sus actividades de la vida diaria. Conclusión: La simulación virtual del brazo y la mano en pacientes afectados por un ictus proporciona a los médicos y fisioterapeutas una nueva herramienta que permite simular la evolución de los déficits en algunos pacientes. http://hdl.handle.net/2117/17955 Title: Synthesis of displacement functions by Bézier curves in constant-breadth cams with parallel flat-faced translating and oscillating followers Authors: Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Català Calderon, Pau Abstract: The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of displacement of the follower can only be freely designed for an interval of the rotation angle of the cam – the designed segment – close or equal to 180°, and the remaining interval – the calculated segment – is obtained through calculation from the first. Guaranteeing the continuity between segments is not a trivial task. This work shows a design procedure which guarantees automatically the global continuity of the law of displacement. This procedure provides the expressions of calculation for both parallel flat-faced double translating follower and parallel flat-faced double oscillating follower. Non-parametric Bézier curves are used for the definition of the displacement functions. For both types of followers, two numerical examples of the design of the displacement functions are given. Furthermore, the corresponding cam profiles are provided. Mon, 25 Feb 2013 10:56:13 GMT http://hdl.handle.net/2117/17955 2013-02-25T10:56:13Z Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Català Calderon, Pau no The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of displacement of the follower can only be freely designed for an interval of the rotation angle of the cam – the designed segment – close or equal to 180°, and the remaining interval – the calculated segment – is obtained through calculation from the first. Guaranteeing the continuity between segments is not a trivial task. This work shows a design procedure which guarantees automatically the global continuity of the law of displacement. This procedure provides the expressions of calculation for both parallel flat-faced double translating follower and parallel flat-faced double oscillating follower. Non-parametric Bézier curves are used for the definition of the displacement functions. For both types of followers, two numerical examples of the design of the displacement functions are given. Furthermore, the corresponding cam profiles are provided. http://hdl.handle.net/2117/17769 Title: Proyecto de Ingeniería Mecánica integrador de conocimientos. Cuarto cuatrimestre del Grado de Ingeniería en Tecnologías Industriales Authors: Cardona Foix, Salvador; Jordi Nebot, Lluïsa; Puig Ortiz, Joan Thu, 14 Feb 2013 14:41:34 GMT http://hdl.handle.net/2117/17769 2013-02-14T14:41:34Z Cardona Foix, Salvador; Jordi Nebot, Lluïsa; Puig Ortiz, Joan no http://hdl.handle.net/2117/17767 Title: Soporte dinámico para el material docente del profesorado. Teoría de Máquinas y Mecanismos Authors: Jordi Nebot, Lluïsa; Cardona Foix, Salvador; Puig Ortiz, Joan Abstract: Es usual que el material docente para las clases tenga procedencia diversa: publicaciones, material de elaboración propia, acceso a la red, etc. y que varíe en mayor o menor grado de un curso a otro, e incluso que tenga que reelaborarse o reorganizarse durante el curso para hacer frente a situaciones no previstas. Todo ello hace deseable un soporte dinámico de este material. Por estas razones se ha buscado un soporte adecuado para el material utilizado en la impartición de la materia de Teoría de Máquinas y Mecanismos en la Escuela Técnica Superior de Ingeniería Industrial de Barcelona. Se ha optado por una aplicación TiddlyWiki. El contenido se ha estructurado en una introducción más los temas que se corresponden con los capítulos del libro de texto utilizado. Cada tema tiene tres apartados: libro, guión del contenido y ejercicios para realizar en clase. Thu, 14 Feb 2013 14:29:16 GMT http://hdl.handle.net/2117/17767 2013-02-14T14:29:16Z Jordi Nebot, Lluïsa; Cardona Foix, Salvador; Puig Ortiz, Joan no Es usual que el material docente para las clases tenga procedencia diversa: publicaciones, material de elaboración propia, acceso a la red, etc. y que varíe en mayor o menor grado de un curso a otro, e incluso que tenga que reelaborarse o reorganizarse durante el curso para hacer frente a situaciones no previstas. Todo ello hace deseable un soporte dinámico de este material. Por estas razones se ha buscado un soporte adecuado para el material utilizado en la impartición de la materia de Teoría de Máquinas y Mecanismos en la Escuela Técnica Superior de Ingeniería Industrial de Barcelona. Se ha optado por una aplicación TiddlyWiki. El contenido se ha estructurado en una introducción más los temas que se corresponden con los capítulos del libro de texto utilizado. Cada tema tiene tres apartados: libro, guión del contenido y ejercicios para realizar en clase. http://hdl.handle.net/2117/17759 Title: Analysis of different uncertainties in the inverse dynamic analysis of human gait Authors: Pàmies Vila, Rosa; Font Llagunes, Josep Maria; Cuadrado, Javier; Alonso, F. Javier Thu, 14 Feb 2013 11:56:04 GMT http://hdl.handle.net/2117/17759 2013-02-14T11:56:04Z Pàmies Vila, Rosa; Font Llagunes, Josep Maria; Cuadrado, Javier; Alonso, F. Javier no http://hdl.handle.net/2117/17736 Title: Dynamic analysis of impact in swing-through crutch gait using impulsive and continuous contact models Authors: Font Llagunes, Josep Maria; Barjau Condomines, Ana; Pàmies Vila, Rosa; Kövecses, József Abstract: The dynamics associated with the impact of the crutch with the ground is an important topic of research, since this is known to be the main cause of mechanical energy loss during swing-through gait. In this work, a multibody system representing a subject walking with crutches is used to investigate the behavior of two different contact models, impulsive and continuous, used for impact analysis. In the impulsive (discrete) approach, the impact interval is considered to be negligible and, therefore, the system configuration is constant. The postimpact state is directly obtained from the preimpact one through algebraic equations. In the continuous approach, the stiffness and dissipation characteristics of the contact surfaces are modeled through nonlinear springs and dampers. The equations of motion are integrated during the impact time interval to obtain the postimpact state, which, in principle, can differ from that obtained by means of the impulsive approach. Although both approaches have been widely used in the field of biomechanics, we have not found any comparative study in the existing literature justifying the model chosen for impact analysis. In this work, we present detailed numerical results and discussions to investigate several dynamic and energetic features associated with crutch impact. Based on the results, we compare the implications of using one contact model or the other. Wed, 13 Feb 2013 17:14:04 GMT http://hdl.handle.net/2117/17736 2013-02-13T17:14:04Z Font Llagunes, Josep Maria; Barjau Condomines, Ana; Pàmies Vila, Rosa; Kövecses, József no The dynamics associated with the impact of the crutch with the ground is an important topic of research, since this is known to be the main cause of mechanical energy loss during swing-through gait. In this work, a multibody system representing a subject walking with crutches is used to investigate the behavior of two different contact models, impulsive and continuous, used for impact analysis. In the impulsive (discrete) approach, the impact interval is considered to be negligible and, therefore, the system configuration is constant. The postimpact state is directly obtained from the preimpact one through algebraic equations. In the continuous approach, the stiffness and dissipation characteristics of the contact surfaces are modeled through nonlinear springs and dampers. The equations of motion are integrated during the impact time interval to obtain the postimpact state, which, in principle, can differ from that obtained by means of the impulsive approach. Although both approaches have been widely used in the field of biomechanics, we have not found any comparative study in the existing literature justifying the model chosen for impact analysis. In this work, we present detailed numerical results and discussions to investigate several dynamic and energetic features associated with crutch impact. Based on the results, we compare the implications of using one contact model or the other. http://hdl.handle.net/2117/17735 Title: Evaluating and comparing three community small-scale wind electrification projects Authors: Ferrer Martí, Laia; Garwood, Anna; Chiroque, José; Ramirez, Benito; Marcelo, Oliver; Garfi, Marianna; Velo García, Enrique Abstract: Electrificationsystemsbasedonrenewableenergyhaveprovensuitableforprovidingelectricity autonomouslytoruralcommunities.Amongthetechnicaloptionsavailable,windsystemsare increasinglygettingattention.InthenorthernmountainsofPeru,at3800m.a.s.l.,threecommunity wind electrificationprojectshavebeenimplemented.Thetechnicalsolutionsusedineachprojectare different:windvs.hybridphotovoltaic-windsystems;individualequipmentvs.microgrids.Thisstudy aims todescribe,evaluateandcomparethesethreesmall-scalecommunitywindelectrification projects.Theevaluationofthethreeprojectswascarriedoutbycomparingpreviousandpresent scenario;attentionhasbeenfocusedonprojectdesignandtechnicalaspects,socio-economicimpacts and sustainabilityandmanagementmodel.Thesethreeexamplesshedlightonboththeadvantages and disadvantagesofdifferenttechnologicaloptionsaswellasonappropriatecommunity-level managementmodels Wed, 13 Feb 2013 16:47:09 GMT http://hdl.handle.net/2117/17735 2013-02-13T16:47:09Z Ferrer Martí, Laia; Garwood, Anna; Chiroque, José; Ramirez, Benito; Marcelo, Oliver; Garfi, Marianna; Velo García, Enrique no Electrificationsystemsbasedonrenewableenergyhaveprovensuitableforprovidingelectricity autonomouslytoruralcommunities.Amongthetechnicaloptionsavailable,windsystemsare increasinglygettingattention.InthenorthernmountainsofPeru,at3800m.a.s.l.,threecommunity wind electrificationprojectshavebeenimplemented.Thetechnicalsolutionsusedineachprojectare different:windvs.hybridphotovoltaic-windsystems;individualequipmentvs.microgrids.Thisstudy aims todescribe,evaluateandcomparethesethreesmall-scalecommunitywindelectrification projects.Theevaluationofthethreeprojectswascarriedoutbycomparingpreviousandpresent scenario;attentionhasbeenfocusedonprojectdesignandtechnicalaspects,socio-economicimpacts and sustainabilityandmanagementmodel.Thesethreeexamplesshedlightonboththeadvantages and disadvantagesofdifferenttechnologicaloptionsaswellasonappropriatecommunity-level managementmodels http://hdl.handle.net/2117/17673 Title: Synthesis of displacement functions by Bézier curves in constant-breadth cams with parallel flat-faced double translating and oscillating followers Authors: Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Català Calderon, Pau Abstract: The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of displacement of the follower can only be freely designed for an interval of the rotation angle of the cam – the designed segment – close or equal to 180°, and the remaining interval – the calculated segment – is obtained through calculation from the first. Guaranteeing the continuity between segments is not a trivial task. This work shows a design procedure which guarantees automatically the global continuity of the law of displacement. This procedure provides the expressions of calculation for both parallel flat-faced double translating follower and parallel flat-faced double oscillating follower. Non-parametric Bézier curves are used for the definition of the displacement functions. For both types of followers, two numerical examples of the design of the displacement functions are given. Furthermore, the corresponding cam profiles are provided. Tue, 12 Feb 2013 16:06:32 GMT http://hdl.handle.net/2117/17673 2013-02-12T16:06:32Z Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; Jordi Nebot, Lluïsa; Català Calderon, Pau no The constant-breadth cam mechanisms, which drive a parallel flat-faced double follower, are desmodromic, and guarantee global bilaterality. In the said mechanisms, the law of displacement of the follower can only be freely designed for an interval of the rotation angle of the cam – the designed segment – close or equal to 180°, and the remaining interval – the calculated segment – is obtained through calculation from the first. Guaranteeing the continuity between segments is not a trivial task. This work shows a design procedure which guarantees automatically the global continuity of the law of displacement. This procedure provides the expressions of calculation for both parallel flat-faced double translating follower and parallel flat-faced double oscillating follower. Non-parametric Bézier curves are used for the definition of the displacement functions. For both types of followers, two numerical examples of the design of the displacement functions are given. Furthermore, the corresponding cam profiles are provided. http://hdl.handle.net/2117/17657 Title: Uso de la STFT en el análisis de vibraciones para detectar y caracterizar la presencia de un defecto en la superficie de las ruedas de un tren Authors: Flórez Serrano, Elkin Gregorio; Cardona Foix, Salvador; Jordi Nebot, Lluïsa Tue, 12 Feb 2013 13:17:20 GMT http://hdl.handle.net/2117/17657 2013-02-12T13:17:20Z Flórez Serrano, Elkin Gregorio; Cardona Foix, Salvador; Jordi Nebot, Lluïsa no http://hdl.handle.net/2117/17617 Title: Heuristic indicators for the design of community off-grid electrification systems based on multiple renewable energies Authors: Ranaboldo, Matteo; Ferrer Martí, Laia; García Villoria, Alberto; Pastor Moreno, Rafael Abstract: Off-grid rural electrification project configurations which consider hybrid generation systems based on multiple renewable sources and the implementation of micro-grids are the most promising design solutions. The efficient design of those systems is a complex task that is facing several technical issues such as limited time and resources available for the purpose, especially in developing countries. This study proposes indicators for supporting and improving the design of community off-grid electrification projects considering hybrid generation and micro-grids. A (Grid Generation Score) GGS is defined in order to identify most promising locations for being the generation point of a micro-grid. The (No- Generation Score) NGS and the (Independent Generation Score) IGS evaluate respectively if a point should be reliably connected to a micro-grid or should better be an independent generation point. All indicators could be easily and quickly calculated at a very first stage of the plan of a community project requiring as input data only demand and resource distributions in the studied area. It is shown that the utilization of proposed indictors can enhance the design of stand-alone community electrification projects based on renewable energies. Mon, 11 Feb 2013 09:41:02 GMT http://hdl.handle.net/2117/17617 2013-02-11T09:41:02Z Ranaboldo, Matteo; Ferrer Martí, Laia; García Villoria, Alberto; Pastor Moreno, Rafael no Off-grid rural electrification project configurations which consider hybrid generation systems based on multiple renewable sources and the implementation of micro-grids are the most promising design solutions. The efficient design of those systems is a complex task that is facing several technical issues such as limited time and resources available for the purpose, especially in developing countries. This study proposes indicators for supporting and improving the design of community off-grid electrification projects considering hybrid generation and micro-grids. A (Grid Generation Score) GGS is defined in order to identify most promising locations for being the generation point of a micro-grid. The (No- Generation Score) NGS and the (Independent Generation Score) IGS evaluate respectively if a point should be reliably connected to a micro-grid or should better be an independent generation point. All indicators could be easily and quickly calculated at a very first stage of the plan of a community project requiring as input data only demand and resource distributions in the studied area. It is shown that the utilization of proposed indictors can enhance the design of stand-alone community electrification projects based on renewable energies.