Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261642
Francisco Javier Arcos-Pardo, J. L. Monroy-Morales, M. Hernández-Ángeles, D. Campos-Gaona
Renewable energy sources have been increasing and developing continuously in the last years, due to advantages over conventional generation sources. Photovoltaic (PV) systems generate electricity from sunlight without creating any air or water pollution and in a clean, quiet and reliable way. The efficiency and performance of PV systems are still under development. As a consequence, the control structures of the PV system grid-connected are a fundamental part for its proper functioning. In this paper, a grid connected photovoltaic system based on a three-phase three-level neutral point clamped (NPC) inverter is presented. The proposed system describes in detail each stage along with the suited controllers, which operate in a proper and efficient way. In addition, the Perturbation and Observation (P&O) algorithm to get the maximum power point tracking (MPPT) of the PV system under different irradiation conditions, is proposed. In order to maximize the PV system power, a three-phase three-level NPC converter is used to achieve higher power levels, lower voltage stress on devices, lower switching frequency and reduce harmonic content. In addition, d-q reference frames are used to decouple the active and reactive power controllers. Simulations to validate the proposed procedures of the complete system are presented.
{"title":"Modeling of photovoltaic grid connected generation system based on three level NPC converter","authors":"Francisco Javier Arcos-Pardo, J. L. Monroy-Morales, M. Hernández-Ángeles, D. Campos-Gaona","doi":"10.1109/ROPEC.2017.8261642","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261642","url":null,"abstract":"Renewable energy sources have been increasing and developing continuously in the last years, due to advantages over conventional generation sources. Photovoltaic (PV) systems generate electricity from sunlight without creating any air or water pollution and in a clean, quiet and reliable way. The efficiency and performance of PV systems are still under development. As a consequence, the control structures of the PV system grid-connected are a fundamental part for its proper functioning. In this paper, a grid connected photovoltaic system based on a three-phase three-level neutral point clamped (NPC) inverter is presented. The proposed system describes in detail each stage along with the suited controllers, which operate in a proper and efficient way. In addition, the Perturbation and Observation (P&O) algorithm to get the maximum power point tracking (MPPT) of the PV system under different irradiation conditions, is proposed. In order to maximize the PV system power, a three-phase three-level NPC converter is used to achieve higher power levels, lower voltage stress on devices, lower switching frequency and reduce harmonic content. In addition, d-q reference frames are used to decouple the active and reactive power controllers. Simulations to validate the proposed procedures of the complete system are presented.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"17 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133424256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261678
V. Torres, H. Ruiz-Paredes, R. Venegas, Z. Ramírez, G. J. P. Torres
A high-impedance fault (HIF) is generated when an overhead power line physically breaks and falls to the ground or when makes unwanted contact with any object to ground which restricts the flow of current. Such kind of fault are difficult to detect and locate in electric distribution systems because of the small currents magnitudes involved which cannot be detected by conventional overcurrent protection. Furthermore, an arcing often accompanies high-impedance faults that can result in fire hazard, damage to electrical equipment, or even worst, a risk to human life. For these reasons the high impedance faults phenomenon has been the subject of intense research. In this paper an analysis HIF field test using the discrete wavelet transform (DWT) is presented, the proposed analysis is a step forward in the HIFs detection and localization in electric distribution systems.
{"title":"HIF analysis using discrete wavelet transform","authors":"V. Torres, H. Ruiz-Paredes, R. Venegas, Z. Ramírez, G. J. P. Torres","doi":"10.1109/ROPEC.2017.8261678","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261678","url":null,"abstract":"A high-impedance fault (HIF) is generated when an overhead power line physically breaks and falls to the ground or when makes unwanted contact with any object to ground which restricts the flow of current. Such kind of fault are difficult to detect and locate in electric distribution systems because of the small currents magnitudes involved which cannot be detected by conventional overcurrent protection. Furthermore, an arcing often accompanies high-impedance faults that can result in fire hazard, damage to electrical equipment, or even worst, a risk to human life. For these reasons the high impedance faults phenomenon has been the subject of intense research. In this paper an analysis HIF field test using the discrete wavelet transform (DWT) is presented, the proposed analysis is a step forward in the HIFs detection and localization in electric distribution systems.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126980250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261627
Jaime A. Torres-Arias, Cristhian M. Quezada- Viñanzaca, D. Chacón-Troya, F. Quizhpi-Palomeque
This document details of the conventional electric method for measuring partial discharges (DP) based on the norm IEC 60156, various test were performed on dielectric oils which had different qualities, the test results were processed through MATLAB's signal processing filters in conjunction with fast fourier transform (FFT) in order to determine the type of partial discharge based on the quality of the dielectric oil and it's contamination level.
{"title":"Measurement of internal partial discharges in dielectric oils by applying the electrical method","authors":"Jaime A. Torres-Arias, Cristhian M. Quezada- Viñanzaca, D. Chacón-Troya, F. Quizhpi-Palomeque","doi":"10.1109/ROPEC.2017.8261627","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261627","url":null,"abstract":"This document details of the conventional electric method for measuring partial discharges (DP) based on the norm IEC 60156, various test were performed on dielectric oils which had different qualities, the test results were processed through MATLAB's signal processing filters in conjunction with fast fourier transform (FFT) in order to determine the type of partial discharge based on the quality of the dielectric oil and it's contamination level.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"2023 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121782190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261620
H. Esponda, E. Vázquez, A. Avalos
This paper describes a method to identify inrush currents in a distribution transformer using the Singular Value Decomposition during transient conditions. The proposed method applies the SVD to a measurement matrix formed by the differential current per each phase normalized and filtered. The goal is to obtain the greatest singular value that brings the most variability highlighting the characteristic patterns in differential currents. A threshold based on Euclidean norm was established to differentiate between inrush and fault currents. If the magnitude of the largest singular value is above the threshold, an internal fault is determined, otherwise, an inrush current. The algorithm was implemented on MATLAB, and a broad array of experimental cases was made in two different three-phase transformers to validate its performance. The algorithm successfully differentiated inrush conditions from internal faults in all 100 cases.
{"title":"Experimental results of a new differential protection algorithm in a distribution transformer using singular values","authors":"H. Esponda, E. Vázquez, A. Avalos","doi":"10.1109/ROPEC.2017.8261620","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261620","url":null,"abstract":"This paper describes a method to identify inrush currents in a distribution transformer using the Singular Value Decomposition during transient conditions. The proposed method applies the SVD to a measurement matrix formed by the differential current per each phase normalized and filtered. The goal is to obtain the greatest singular value that brings the most variability highlighting the characteristic patterns in differential currents. A threshold based on Euclidean norm was established to differentiate between inrush and fault currents. If the magnitude of the largest singular value is above the threshold, an internal fault is determined, otherwise, an inrush current. The algorithm was implemented on MATLAB, and a broad array of experimental cases was made in two different three-phase transformers to validate its performance. The algorithm successfully differentiated inrush conditions from internal faults in all 100 cases.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130173793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261604
J. Muñoz-Minjares, Y. Shmaliy, R. Olivera-Reyna, Reynel Olivera-Reyna, O. Vite-Chavez
Jitter is inherent to the breakpoints of measured genome somatic copy number alterations (SCNAs). Therefore, an analysis of jitter is required to reduce errors in the SCNA estimation. The SCNA measurements are accompanied with intensive noise that may cause errors and ambiguities in the breakpoint detection with low signal-to-noise ratios (SNRs). We show that the asymmetric exponential power distribution (AEPD) provides much better approximation to the jitter distribution than the earlier proposed discrete skew Laplace distribution. Furthermore, we confirm that (AEP) distribution its suitable for computing the confidence upper and lower boundary limits in order to guarantee an existence of genomic changes with a required probability. We test some neuroblastoma SCNAs measurements by the upper and lower confidence bound masks with several probabilities.
{"title":"Approximation of Jitter probability in the breakpoints using AEP distribution and confidence masks of SCNA","authors":"J. Muñoz-Minjares, Y. Shmaliy, R. Olivera-Reyna, Reynel Olivera-Reyna, O. Vite-Chavez","doi":"10.1109/ROPEC.2017.8261604","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261604","url":null,"abstract":"Jitter is inherent to the breakpoints of measured genome somatic copy number alterations (SCNAs). Therefore, an analysis of jitter is required to reduce errors in the SCNA estimation. The SCNA measurements are accompanied with intensive noise that may cause errors and ambiguities in the breakpoint detection with low signal-to-noise ratios (SNRs). We show that the asymmetric exponential power distribution (AEPD) provides much better approximation to the jitter distribution than the earlier proposed discrete skew Laplace distribution. Furthermore, we confirm that (AEP) distribution its suitable for computing the confidence upper and lower boundary limits in order to guarantee an existence of genomic changes with a required probability. We test some neuroblastoma SCNAs measurements by the upper and lower confidence bound masks with several probabilities.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127256993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261621
S. F. M. Sinchi, P. F. Quizhpi, C. H. P. Guillén
This report discloses the modification of the Schwarz equations presented in the IEEE 80-2013 standard, in order to calculate the ground resistance of two and three rods connected in line, and three rods connected in triangle. The implementation of these designs is carried out in several soils with different resistivity values, to proceed to measure the resistance of grounding and to check with the theoretical calculation.
{"title":"Calculation of the earth resistance of the union of two and three rods by modified Schwarz equations and field tests","authors":"S. F. M. Sinchi, P. F. Quizhpi, C. H. P. Guillén","doi":"10.1109/ROPEC.2017.8261621","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261621","url":null,"abstract":"This report discloses the modification of the Schwarz equations presented in the IEEE 80-2013 standard, in order to calculate the ground resistance of two and three rods connected in line, and three rods connected in triangle. The implementation of these designs is carried out in several soils with different resistivity values, to proceed to measure the resistance of grounding and to check with the theoretical calculation.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121126908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261608
L. A. Arias, E. Rivas, F. Santamaria
This paper proposes an integration agent of Demand Response (DR). The integrator agent answers requests for ancillary services made by the network operator, using demand response. The mode of operation to offer an auxiliary load reduction service is explained by the objective cost function and UML (Unified Modeling Language). The operation is illustrated in case of study.
{"title":"Integration of demand response in energy distribution markets: A new approach","authors":"L. A. Arias, E. Rivas, F. Santamaria","doi":"10.1109/ROPEC.2017.8261608","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261608","url":null,"abstract":"This paper proposes an integration agent of Demand Response (DR). The integrator agent answers requests for ancillary services made by the network operator, using demand response. The mode of operation to offer an auxiliary load reduction service is explained by the objective cost function and UML (Unified Modeling Language). The operation is illustrated in case of study.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115570579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261622
K. G. Herrera, E. Ruiz‐Velázquez, J. García-Rodríguez
This paper presents a H∞ robust controller to glycemic control in Type 2 Diabetes Mellitus (T2DM) patients. The proposed control action calculates the insulin delivery rate in order to prevent hypoglycemic and hyperglycemic levels in patients. A nonlinear compartmental model that represents the glucose regulation behavior for T2DM subjects was linearized around a nominal healthy subject conditions, and then reduced for synthesis design. Unstructured uncertainties were considered in model based on sensitivity analysis and a 10th order robust controller was derived with a γ = 0.9921. The proposed scheme uses as a reference glucose values of a healthy patient. The applicability of the proposed control scheme is shown via simulations for a scenario of three daily intakes.
{"title":"Robust blood glucose regulation for Type II Diabetes Mellitus patients","authors":"K. G. Herrera, E. Ruiz‐Velázquez, J. García-Rodríguez","doi":"10.1109/ROPEC.2017.8261622","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261622","url":null,"abstract":"This paper presents a H∞ robust controller to glycemic control in Type 2 Diabetes Mellitus (T2DM) patients. The proposed control action calculates the insulin delivery rate in order to prevent hypoglycemic and hyperglycemic levels in patients. A nonlinear compartmental model that represents the glucose regulation behavior for T2DM subjects was linearized around a nominal healthy subject conditions, and then reduced for synthesis design. Unstructured uncertainties were considered in model based on sensitivity analysis and a 10th order robust controller was derived with a γ = 0.9921. The proposed scheme uses as a reference glucose values of a healthy patient. The applicability of the proposed control scheme is shown via simulations for a scenario of three daily intakes.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132470672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261580
Salvador Z. Hernandez-Michel, Uriel Hernandez- Osornio, J. Amezquita-Sanchez, M. Valtierra-Rodríguez, D. Granados-Lieberman
Wind turbines (WTs) are increasingly used in many countries for clean and green electric generation. Condition monitoring and fault detection of WTs reduce both downtimes and costs in the electric service. In this regard, it is important to ensure their safety and reliability. This paper presents a methodology based on the wavelet packet transform (WPT) for detection of unbalance fault in a WT. In general, the methodology consists of the acquisition and analysis of vibration signals coming from the WT. For vibration signals, WPT is firstly applied. Then, one node of the wavelet packet tree is analyzed using an energy index. This index is computed as a fault feature. Finally, a statistical analysis is carried out in order to observe the capability of discriminating between a nominal condition and a fault condition. Obtained results show that the proposal can detect the unbalance fault.
{"title":"Detection of unbalance in a wind turbine by using wavelet packet transform and vibration signals","authors":"Salvador Z. Hernandez-Michel, Uriel Hernandez- Osornio, J. Amezquita-Sanchez, M. Valtierra-Rodríguez, D. Granados-Lieberman","doi":"10.1109/ROPEC.2017.8261580","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261580","url":null,"abstract":"Wind turbines (WTs) are increasingly used in many countries for clean and green electric generation. Condition monitoring and fault detection of WTs reduce both downtimes and costs in the electric service. In this regard, it is important to ensure their safety and reliability. This paper presents a methodology based on the wavelet packet transform (WPT) for detection of unbalance fault in a WT. In general, the methodology consists of the acquisition and analysis of vibration signals coming from the WT. For vibration signals, WPT is firstly applied. Then, one node of the wavelet packet tree is analyzed using an energy index. This index is computed as a fault feature. Finally, a statistical analysis is carried out in order to observe the capability of discriminating between a nominal condition and a fault condition. Obtained results show that the proposal can detect the unbalance fault.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"28 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132653969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ROPEC.2017.8261589
Clarissa Nallely Acosta Campas, M. Martínez
The integration of distributed generation (DG) in the electrical systems of distribution (ESD), specifically photovoltaic (PV) systems, have taken increasingly greater importance with the passage of time. As the number of installations of PV is growing exponentially worldwide. Therefore, the level of penetration (LP) of the PV on the ESD must be quantified according to the situations and characteristics of each country and circuit following a series of simulations and certain studies. Studies can provide information about problems of regulation from voltage (VR), losses, power quality, among others. This article focuses on studying the impact that have the PV on power (PF) factor, especially in feeders and electrical substations (ES), in the case of Mexico.
{"title":"Interaction between photovoltaic power systems and distribution power systems: Impact on the power factor and energy losses","authors":"Clarissa Nallely Acosta Campas, M. Martínez","doi":"10.1109/ROPEC.2017.8261589","DOIUrl":"https://doi.org/10.1109/ROPEC.2017.8261589","url":null,"abstract":"The integration of distributed generation (DG) in the electrical systems of distribution (ESD), specifically photovoltaic (PV) systems, have taken increasingly greater importance with the passage of time. As the number of installations of PV is growing exponentially worldwide. Therefore, the level of penetration (LP) of the PV on the ESD must be quantified according to the situations and characteristics of each country and circuit following a series of simulations and certain studies. Studies can provide information about problems of regulation from voltage (VR), losses, power quality, among others. This article focuses on studying the impact that have the PV on power (PF) factor, especially in feeders and electrical substations (ES), in the case of Mexico.","PeriodicalId":260469,"journal":{"name":"2017 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130863664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：