Pub Date : 2019-07-23DOI: 10.1109/CJECE.2019.2898432
C. Chung, R. Karki, Raman Paranjape, S. Yousefi
Welcome to a Special Issue of the Canadian Journal of Electrical and Computer Engineering, which presents some of the top papers (in extended form) from the Electrical Power and Energy Conference (EPEC 2017) held in Saskatoon, SK, Canada, October 22–25, 2017. This conference was jointly organized by the IEEE North Saskatchewan Section and the IEEE South Saskatchewan Section, and this was the first time that it was held in Saskatoon.
{"title":"Guest Editorial: Special Issue on EPEC 2017 Éditorial invité: Numéro spécial sur EPEC 2017","authors":"C. Chung, R. Karki, Raman Paranjape, S. Yousefi","doi":"10.1109/CJECE.2019.2898432","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2898432","url":null,"abstract":"Welcome to a Special Issue of the Canadian Journal of Electrical and Computer Engineering, which presents some of the top papers (in extended form) from the Electrical Power and Energy Conference (EPEC 2017) held in Saskatoon, SK, Canada, October 22–25, 2017. This conference was jointly organized by the IEEE North Saskatchewan Section and the IEEE South Saskatchewan Section, and this was the first time that it was held in Saskatoon.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"31 1","pages":"134-134"},"PeriodicalIF":1.7,"publicationDate":"2019-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86139685","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 : 2019-07-23DOI: 10.1109/CJECE.2019.2914723
Dimas Aji Nugraha, K. Lian, .. Suwarno
Partial shading is a common and difficult problem to be solved in a photovoltaic (PV) system. Numerous efforts have been introduced to mitigate this problem. Some commonly used approaches are deploying some metaheuristic (MH) algorithm to track the multiple-peak $P - V$ curve of partially shaded PV system. Cuckoo search (CS) is a new optimization algorithm based on the MH approach. It has been used to solve an optimization problem in many applications, including the maximum power point tracking (MPPT) problem. The CS algorithm performs well in tracking the global maximum power point (GMPP). However, just like any other MH algorithm, there is still a dilemmatic trading between their accuracy and the tracking time needed to find GMPP. This paper proposes a new MPPT algorithm by combining the CS algorithm with golden section search (GSS) to take beneficial features from both the algorithms. To validate the proposed algorithm, it is evaluated with various cases of partial shading. The simulation and experimental results show a noticeable performance improvement compared with the original CS algorithm and other MH algorithms.
{"title":"A Novel MPPT Method Based on Cuckoo Search Algorithm and Golden Section Search Algorithm for Partially Shaded PV System","authors":"Dimas Aji Nugraha, K. Lian, .. Suwarno","doi":"10.1109/CJECE.2019.2914723","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2914723","url":null,"abstract":"Partial shading is a common and difficult problem to be solved in a photovoltaic (PV) system. Numerous efforts have been introduced to mitigate this problem. Some commonly used approaches are deploying some metaheuristic (MH) algorithm to track the multiple-peak $P - V$ curve of partially shaded PV system. Cuckoo search (CS) is a new optimization algorithm based on the MH approach. It has been used to solve an optimization problem in many applications, including the maximum power point tracking (MPPT) problem. The CS algorithm performs well in tracking the global maximum power point (GMPP). However, just like any other MH algorithm, there is still a dilemmatic trading between their accuracy and the tracking time needed to find GMPP. This paper proposes a new MPPT algorithm by combining the CS algorithm with golden section search (GSS) to take beneficial features from both the algorithms. To validate the proposed algorithm, it is evaluated with various cases of partial shading. The simulation and experimental results show a noticeable performance improvement compared with the original CS algorithm and other MH algorithms.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"173-182"},"PeriodicalIF":1.7,"publicationDate":"2019-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2914723","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44620810","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 : 2019-07-23DOI: 10.1109/CJECE.2018.2802461
Ali R. Al-Roomi, M. El-Hawary
The optimal relay coordination (ORC) problem for directional overcurrent relays (DOCRs) has been solved by many conventional and modern optimization algorithms. All these studies were based on the common assumption that all DOCRs are numerical, digital “hardware-based,” static, or electromechanical. Unfortunately, the transition between these technologies does not happen instantaneously, so protection engineers could see different models of these protective relays in some real electric power systems. Moreover, when old electromechanical, static, and digital relays are replaced with the latest state-of-the-art numerical relays, the older relays are kept as backup protective devices. Some called them “primary” and “local-backup” relays, whereas others called them “main-1” and “main-2” relays. The reason behind the second terminology is the chance that the old relays could act ahead of the numerical relays. In this paper, a realistic mathematical model of the ORC problem is formulated and solved using a new hybrid evolutionary algorithm. To judge whether this realistic ORC problem is completely/partially solvable or not, the IEEE 6-bus, 15-bus, and 42-bus test systems are simulated. The results prove that the technique is an effective tool to indicate which relay sets accept/do not accept this double primary relay strategy.
{"title":"Optimal Coordination of Double Primary Directional Overcurrent Relays Using a New Combinational BBO/DE Algorithm","authors":"Ali R. Al-Roomi, M. El-Hawary","doi":"10.1109/CJECE.2018.2802461","DOIUrl":"https://doi.org/10.1109/CJECE.2018.2802461","url":null,"abstract":"The optimal relay coordination (ORC) problem for directional overcurrent relays (DOCRs) has been solved by many conventional and modern optimization algorithms. All these studies were based on the common assumption that all DOCRs are numerical, digital “hardware-based,” static, or electromechanical. Unfortunately, the transition between these technologies does not happen instantaneously, so protection engineers could see different models of these protective relays in some real electric power systems. Moreover, when old electromechanical, static, and digital relays are replaced with the latest state-of-the-art numerical relays, the older relays are kept as backup protective devices. Some called them “primary” and “local-backup” relays, whereas others called them “main-1” and “main-2” relays. The reason behind the second terminology is the chance that the old relays could act ahead of the numerical relays. In this paper, a realistic mathematical model of the ORC problem is formulated and solved using a new hybrid evolutionary algorithm. To judge whether this realistic ORC problem is completely/partially solvable or not, the IEEE 6-bus, 15-bus, and 42-bus test systems are simulated. The results prove that the technique is an effective tool to indicate which relay sets accept/do not accept this double primary relay strategy.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"135-147"},"PeriodicalIF":1.7,"publicationDate":"2019-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2018.2802461","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48594499","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 : 2019-07-23DOI: 10.1109/CJECE.2019.2906007
Xiaodong Liang, Md. Nasmus Sakib Khan Shabbir, N. Khan, Xiaodi Yan
In this paper, the measurement-based characteristic curves, reactive power–voltage ($Q$ –$V$ ) curve and reactive power–active power–voltage ($Q$ –$P$ –$V$ ) curve, are developed for voltage stability and control at the point of interconnection (POI) between a wind power plant (WPP) and a utility grid. The procedure to obtain an effective $Q$ –$V$ curve using the supervisory control and data acquisition (SCADA) measurement data is proposed. The SCADA data used in this paper were recorded in 2016 at the POI of a 27-MW WPP currently in operation in Newfoundland and Labrador (NL), Canada. Each $Q$ –$V$ curve is created for a particular month using the SCADA data corresponding to a very narrowly defined active power range, so the active power is considered constant as the conventional $Q$ –$V$ curve concept. The MATLAB curve fitting toolbox is used to realize the most fit mathematical equations for $Q$ –$V$ and $Q$ –$P$ –$V$ curves. The developed $Q$ –$V$ and $Q$ –$P$ –$V$ curves can be used for the data-driven voltage control for WPPs; and the $Q$ –$V$ curves can also be used for the voltage stability evaluation.
{"title":"Measurement-Based Characteristic Curves for Voltage Stability and Control at the Point of Interconnection of Wind Power Plants","authors":"Xiaodong Liang, Md. Nasmus Sakib Khan Shabbir, N. Khan, Xiaodi Yan","doi":"10.1109/CJECE.2019.2906007","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2906007","url":null,"abstract":"In this paper, the measurement-based characteristic curves, reactive power–voltage (<inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula>) curve and reactive power–active power–voltage (<inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$P$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula>) curve, are developed for voltage stability and control at the point of interconnection (POI) between a wind power plant (WPP) and a utility grid. The procedure to obtain an effective <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curve using the supervisory control and data acquisition (SCADA) measurement data is proposed. The SCADA data used in this paper were recorded in 2016 at the POI of a 27-MW WPP currently in operation in Newfoundland and Labrador (NL), Canada. Each <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curve is created for a particular month using the SCADA data corresponding to a very narrowly defined active power range, so the active power is considered constant as the conventional <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curve concept. The MATLAB curve fitting toolbox is used to realize the most fit mathematical equations for <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> and <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$P$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curves. The developed <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> and <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$P$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curves can be used for the data-driven voltage control for WPPs; and the <inline-formula> <tex-math notation=\"LaTeX\">$Q$ </tex-math></inline-formula>–<inline-formula> <tex-math notation=\"LaTeX\">$V$ </tex-math></inline-formula> curves can also be used for the voltage stability evaluation.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"163-172"},"PeriodicalIF":1.7,"publicationDate":"2019-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2906007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44565618","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 : 2019-06-24DOI: 10.1109/CJECE.2018.2885855
I. Orlovskyi
The method of transformation of a nonlinear mathematical model of an electromechanical object to the form of a modified artificial recurrent neural network has been further developed. The method makes it possible to use knowledge about the object for the synthesis of a recurrent neural network (RNN) structure and the computation of their coefficients. Nonlinearities in the proposed RNN were realized by expanding the input signal space of the network, using the normalized signals of polynomial terms. Mathematical transformations were performed for a model of thyristor-based electric drive with a dc motor of series excitation. In the electric drive model, different nonlinearities were set, namely, the magnetic flux and inductance of the motor winding dependence on the motor current and its derivative, the thyristor converter gain from the reference voltage, and the dependence of the moment of inertia on the speed. An accuracy estimation for the models in the form of an RNN was made.
{"title":"Transformation Method of Nonlinear Mathematical Models of the DC Series Drive into the Form of Modified Recurrent Neural Network","authors":"I. Orlovskyi","doi":"10.1109/CJECE.2018.2885855","DOIUrl":"https://doi.org/10.1109/CJECE.2018.2885855","url":null,"abstract":"The method of transformation of a nonlinear mathematical model of an electromechanical object to the form of a modified artificial recurrent neural network has been further developed. The method makes it possible to use knowledge about the object for the synthesis of a recurrent neural network (RNN) structure and the computation of their coefficients. Nonlinearities in the proposed RNN were realized by expanding the input signal space of the network, using the normalized signals of polynomial terms. Mathematical transformations were performed for a model of thyristor-based electric drive with a dc motor of series excitation. In the electric drive model, different nonlinearities were set, namely, the magnetic flux and inductance of the motor winding dependence on the motor current and its derivative, the thyristor converter gain from the reference voltage, and the dependence of the moment of inertia on the speed. An accuracy estimation for the models in the form of an RNN was made.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"68-77"},"PeriodicalIF":1.7,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2018.2885855","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45666015","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 : 2019-06-24DOI: 10.1109/CJECE.2019.2892087
A. Sheir, M. Orabi, M. Youssef, Mahrous E. Ahmed
This paper introduces a generalized platform for the design selection of multilevel inverters (MLIs) topologies for any industry, especially in low- and medium-power applications. This platform is novel as it combines the component count and stress in any MLI in a normalized unique score. Each MLI topology is designed to match specific criteria to meet a specific application, which introduces diversified sets of merits and demerits in each case. Therefore, choosing a suitable MLI topology for the specific application is rather a difficult, time-consuming, and complex process. Moreover, the comparison can only be conducted between MLI topologies that fall under the same category. This paper introduces a comprehensive study to propose a new benchmark (BM) which can be used to compare MLI topologies regardless of their constructions or oriented applications. Each MLI topology gets a BM score based on comparative factors that evaluate its components quantitatively and qualitatively. Thus, comparing different types of MLI topologies is a simple process of comparing their calculated BM scores leading to better well-informed choice. First, the proposed BM-derived forms are discussed. Then, the proposed methodology is illustrated by applying to various types of MLI topologies including conventional and recently introduced ones.
{"title":"Toward a Way to Benchmark Multilevel Inverter Topologies Based on Level to Components Ratio","authors":"A. Sheir, M. Orabi, M. Youssef, Mahrous E. Ahmed","doi":"10.1109/CJECE.2019.2892087","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2892087","url":null,"abstract":"This paper introduces a generalized platform for the design selection of multilevel inverters (MLIs) topologies for any industry, especially in low- and medium-power applications. This platform is novel as it combines the component count and stress in any MLI in a normalized unique score. Each MLI topology is designed to match specific criteria to meet a specific application, which introduces diversified sets of merits and demerits in each case. Therefore, choosing a suitable MLI topology for the specific application is rather a difficult, time-consuming, and complex process. Moreover, the comparison can only be conducted between MLI topologies that fall under the same category. This paper introduces a comprehensive study to propose a new benchmark (BM) which can be used to compare MLI topologies regardless of their constructions or oriented applications. Each MLI topology gets a BM score based on comparative factors that evaluate its components quantitatively and qualitatively. Thus, comparing different types of MLI topologies is a simple process of comparing their calculated BM scores leading to better well-informed choice. First, the proposed BM-derived forms are discussed. Then, the proposed methodology is illustrated by applying to various types of MLI topologies including conventional and recently introduced ones.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"78-92"},"PeriodicalIF":1.7,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2892087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43628904","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 : 2019-06-24DOI: 10.1109/CJECE.2019.2903842
M. Daryabak, S. Filizadeh, Afshin Bagheri Vandaei
This paper develops a dynamic phasor model of a line-commutated converter high-voltage direct current (LCC-HVDC) system that includes unbalanced operation and commutation failure. This model is beneficial in studying the behavior of the HVDC systems under asymmetrical faults, and it complements the conventional transient simulation-based methods. Equally, importantly, the model includes the representation of commutation failure that may arise as a result of severe faults. Due to its selectivity of the considered harmonics, the developed model has markedly less computational intensity than an electromagnetic transient (EMT) simulation model. This gives the model a distinct advantage in the study of large-signal transients of the LCC-HVDC systems, particularly where repetitive simulations are required. Validation of the proposed model is done using a detailed EMT model of the CIGRE monopolar LCC-HVDC benchmark.
{"title":"Dynamic Phasor Modeling of LCC-HVDC Systems: Unbalanced Operation and Commutation Failure","authors":"M. Daryabak, S. Filizadeh, Afshin Bagheri Vandaei","doi":"10.1109/CJECE.2019.2903842","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2903842","url":null,"abstract":"This paper develops a dynamic phasor model of a line-commutated converter high-voltage direct current (LCC-HVDC) system that includes unbalanced operation and commutation failure. This model is beneficial in studying the behavior of the HVDC systems under asymmetrical faults, and it complements the conventional transient simulation-based methods. Equally, importantly, the model includes the representation of commutation failure that may arise as a result of severe faults. Due to its selectivity of the considered harmonics, the developed model has markedly less computational intensity than an electromagnetic transient (EMT) simulation model. This gives the model a distinct advantage in the study of large-signal transients of the LCC-HVDC systems, particularly where repetitive simulations are required. Validation of the proposed model is done using a detailed EMT model of the CIGRE monopolar LCC-HVDC benchmark.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"121-131"},"PeriodicalIF":1.7,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2903842","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48036687","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 : 2019-06-24DOI: 10.1109/CJECE.2019.2895047
Riadul Islam
It appears that the relentless pursuit of Moore’s law scaling from one generation of process technology to the next increases circuit vulnerability to single-event transient (SET)-induced double-node upset (SEDU). In this paper, we present a novel SEDU-hardened latch. The latch consists of a new 16-transistor (16T) SEDU-hardened storage cell and a C-type output buffer. The latch exhibits 25% lower power consumption, is 81% faster, and also shows 86% lower power-delay product than the existing SEDU-hardened latches. In addition, we present the first SEDU-hardened flip-flop that exhibits negative hold time. The proposed SEDU-hardened flip-flop is 29% faster, consumes 50% lower dynamic power and 25% lower static power, has 45% lower setup time, and uses 27% lower area than the existing partial SEDU-hardened flip-flop.
{"title":"Low-Power Highly Reliable SET-Induced Dual-Node Upset-Hardened Latch and Flip-Flop","authors":"Riadul Islam","doi":"10.1109/CJECE.2019.2895047","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2895047","url":null,"abstract":"It appears that the relentless pursuit of Moore’s law scaling from one generation of process technology to the next increases circuit vulnerability to single-event transient (SET)-induced double-node upset (SEDU). In this paper, we present a novel SEDU-hardened latch. The latch consists of a new 16-transistor (16T) SEDU-hardened storage cell and a C-type output buffer. The latch exhibits 25% lower power consumption, is 81% faster, and also shows 86% lower power-delay product than the existing SEDU-hardened latches. In addition, we present the first SEDU-hardened flip-flop that exhibits negative hold time. The proposed SEDU-hardened flip-flop is 29% faster, consumes 50% lower dynamic power and 25% lower static power, has 45% lower setup time, and uses 27% lower area than the existing partial SEDU-hardened flip-flop.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"93-101"},"PeriodicalIF":1.7,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2895047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45236818","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 : 2019-04-02DOI: 10.1109/CJECE.2018.2883030
L. Dekhici, R. Redjem, K. Belkadi, A. E. Mhamedi
This paper aims to solve the problem of home-care routing by using a metaheuristic inspired by nature which is the firefly (FF) algorithm. A good discretization and correction of the solution was provided to maintain the advantages of such an algorithm on this combinatorial problem. Even if the problem is only an extension of the vehicle routing problem with time windows (TWVRP), the human aspect hardens it so that any abuse of a constraint can destroy the feasibility or reduce the services quality. Hard constraints concern the precedence between cares and a patient cares synchronization, while soft constraints concern time windows preferences. The problem in this paper also takes into account overtime and the painfulness of home workers. The main purpose is to minimize the routing total duration and to maximize the constraints satisfaction. The results on two examples show that the discrete version of the FF algorithm gives a better total travel time and better satisfies the constraints.
{"title":"Discretization of the Firefly Algorithm for Home Care","authors":"L. Dekhici, R. Redjem, K. Belkadi, A. E. Mhamedi","doi":"10.1109/CJECE.2018.2883030","DOIUrl":"https://doi.org/10.1109/CJECE.2018.2883030","url":null,"abstract":"This paper aims to solve the problem of home-care routing by using a metaheuristic inspired by nature which is the firefly (FF) algorithm. A good discretization and correction of the solution was provided to maintain the advantages of such an algorithm on this combinatorial problem. Even if the problem is only an extension of the vehicle routing problem with time windows (TWVRP), the human aspect hardens it so that any abuse of a constraint can destroy the feasibility or reduce the services quality. Hard constraints concern the precedence between cares and a patient cares synchronization, while soft constraints concern time windows preferences. The problem in this paper also takes into account overtime and the painfulness of home workers. The main purpose is to minimize the routing total duration and to maximize the constraints satisfaction. The results on two examples show that the discrete version of the FF algorithm gives a better total travel time and better satisfies the constraints.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"20-26"},"PeriodicalIF":1.7,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2018.2883030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45388578","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 : 2019-04-02DOI: 10.1109/CJECE.2019.2891850
Yongkeun Lee, Jongkwan Kim
A bootstrap circuit for operating the high-side insulated-gate bipolar transistor of a three-phase inverter for a brushless dc motor drive is analyzed theoretically to avoid under voltage lockout by minimizing the discharge of a bootstrap capacitor (BSC). Unlike various methods of reducing the discharge of BSCs, which limits the controllability of the motor speed/torque, a proposed inverted PWM driving scheme has no limit to the controllability while maintaining the proper voltage level for a BSC. This method is verified experimentally in this paper.
{"title":"Analysis of Bootstrap Circuit Operation With an Inverted PWM Drive Scheme for a Three-Phase Inverter for a Brushless DC Motor Drive","authors":"Yongkeun Lee, Jongkwan Kim","doi":"10.1109/CJECE.2019.2891850","DOIUrl":"https://doi.org/10.1109/CJECE.2019.2891850","url":null,"abstract":"A bootstrap circuit for operating the high-side insulated-gate bipolar transistor of a three-phase inverter for a brushless dc motor drive is analyzed theoretically to avoid under voltage lockout by minimizing the discharge of a bootstrap capacitor (BSC). Unlike various methods of reducing the discharge of BSCs, which limits the controllability of the motor speed/torque, a proposed inverted PWM driving scheme has no limit to the controllability while maintaining the proper voltage level for a BSC. This method is verified experimentally in this paper.","PeriodicalId":55287,"journal":{"name":"Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique","volume":"42 1","pages":"58-65"},"PeriodicalIF":1.7,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CJECE.2019.2891850","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42501917","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}
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