Pub Date : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980566
D. Djalel, Daas Abdelhakim
Electrical networks of power transmission practically deals in the bulk transfer of electrical energy, from generating stations situated many kilometers away from the main consumption centers or the cities. For this reason the long distance transmission cables are of utmost necessity for effective power transfer, which in-evidently results in huge losses across the system. The Reliable electrical network is one that transports the energy with minimal power losses, losses corona effect represent one of causes that hinder reaching this performance in HV lines are either permanent mode or in the transient mode. In this paper we present the phenomenon of corona and its behavior in different climatic and atmospheric conditions such as rain, humidity, the dust, the sand, dry weather of the one part and over-voltages induced by strokes lightning. We deal in this paper, the influence of the corona under these different conditions on the power losses in the power lines and the proposal of a new model of three-phase line with transient corona.
{"title":"Influence of atmospheric conditions on the corona effect in HV power systems","authors":"D. Djalel, Daas Abdelhakim","doi":"10.1109/EPEPEMC.2014.6980566","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980566","url":null,"abstract":"Electrical networks of power transmission practically deals in the bulk transfer of electrical energy, from generating stations situated many kilometers away from the main consumption centers or the cities. For this reason the long distance transmission cables are of utmost necessity for effective power transfer, which in-evidently results in huge losses across the system. The Reliable electrical network is one that transports the energy with minimal power losses, losses corona effect represent one of causes that hinder reaching this performance in HV lines are either permanent mode or in the transient mode. In this paper we present the phenomenon of corona and its behavior in different climatic and atmospheric conditions such as rain, humidity, the dust, the sand, dry weather of the one part and over-voltages induced by strokes lightning. We deal in this paper, the influence of the corona under these different conditions on the power losses in the power lines and the proposal of a new model of three-phase line with transient corona.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115680560","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980609
M. Kale, I. Hauer, W. Kruschel, T. Maurer, P. Zacharias
Diverse and dynamic load and generation patterns are putting new demands on the operation of distribution networks. New network management approaches and innovative equipment are needed to handle highly volatile voltage profiles resulting from intermittent distributed generation. This paper investigates the use of an inline voltage regulator in a LV network. As simulations based on realistic feed-in scenarios show, it is an efficient tool for influencing a network's voltage profile. Since voltage regulation is not required permanently, such a flexible power electronic device can be further used to increase a power system's efficiency and reliability by implementing features such as reactive power compensation or mitigation of harmonics. Concerning this matter, an approach for an adaptive system management is discussed that allows the provision of additional functionality whenever the converter is not used to its full capacity for the voltage regulation task.
{"title":"Use of multifunctional power electronic network controllers in smart distribution systems","authors":"M. Kale, I. Hauer, W. Kruschel, T. Maurer, P. Zacharias","doi":"10.1109/EPEPEMC.2014.6980609","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980609","url":null,"abstract":"Diverse and dynamic load and generation patterns are putting new demands on the operation of distribution networks. New network management approaches and innovative equipment are needed to handle highly volatile voltage profiles resulting from intermittent distributed generation. This paper investigates the use of an inline voltage regulator in a LV network. As simulations based on realistic feed-in scenarios show, it is an efficient tool for influencing a network's voltage profile. Since voltage regulation is not required permanently, such a flexible power electronic device can be further used to increase a power system's efficiency and reliability by implementing features such as reactive power compensation or mitigation of harmonics. Concerning this matter, an approach for an adaptive system management is discussed that allows the provision of additional functionality whenever the converter is not used to its full capacity for the voltage regulation task.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125242570","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980534
S. Onofre, Pedro A. C. Sousa, J. Pimentão
Surveillance systems are evolving and analog cameras give way to IP cameras, wireless sensors are used in home surveillance, remote mobile phones access to video surveillance is current practice, but the concept itself, of “surveillance systems”, has not evolved accordingly. Control rooms are still the heart of operations, where several security guards spread their attention over an array of monitors, trying to find events. In some cases, a set of sensors may be used to help detect intrusion or fire, but these are seldom integrated with video surveillance. Under a research project (DVA) we developed a new approach to surveillance systems based in geographic position of events, sensors and security agents. This new architecture, based in geographic positions, is fully distributed (empowering sensors with processing skills), bridging them together in a society of software agents that, supported by inference capabilities, work for a common awareness and, given that they are location aware, can direct the appropriate security officers for each kind of emergency.
{"title":"Geo-referenced multi-agent architecture for surveillance","authors":"S. Onofre, Pedro A. C. Sousa, J. Pimentão","doi":"10.1109/EPEPEMC.2014.6980534","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980534","url":null,"abstract":"Surveillance systems are evolving and analog cameras give way to IP cameras, wireless sensors are used in home surveillance, remote mobile phones access to video surveillance is current practice, but the concept itself, of “surveillance systems”, has not evolved accordingly. Control rooms are still the heart of operations, where several security guards spread their attention over an array of monitors, trying to find events. In some cases, a set of sensors may be used to help detect intrusion or fire, but these are seldom integrated with video surveillance. Under a research project (DVA) we developed a new approach to surveillance systems based in geographic position of events, sensors and security agents. This new architecture, based in geographic positions, is fully distributed (empowering sensors with processing skills), bridging them together in a society of software agents that, supported by inference capabilities, work for a common awareness and, given that they are location aware, can direct the appropriate security officers for each kind of emergency.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"30 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120907238","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980668
Shota Watanabe, T. Takeshita
This paper presents the characteristics of the Pulse Width Modulation (PWM) patterns of the Matrix Converter (MC). The various PWM patterns of nine bi-directional switches for the MC can be established. All the combinations of duty cycles with four commutations in three phases during one control period using only input voltage values are derived. The PWM patterns of the derived duty cycles for low output voltage harmonics are evaluated. The characteristics and evaluations of the output voltage harmonics for the PWM patterns have been verified by theories and experiments.
{"title":"Evaluation of PWM patterns of a matrix converter for reduction of output voltage harmonics","authors":"Shota Watanabe, T. Takeshita","doi":"10.1109/EPEPEMC.2014.6980668","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980668","url":null,"abstract":"This paper presents the characteristics of the Pulse Width Modulation (PWM) patterns of the Matrix Converter (MC). The various PWM patterns of nine bi-directional switches for the MC can be established. All the combinations of duty cycles with four commutations in three phases during one control period using only input voltage values are derived. The PWM patterns of the derived duty cycles for low output voltage harmonics are evaluated. The characteristics and evaluations of the output voltage harmonics for the PWM patterns have been verified by theories and experiments.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124903104","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980535
A. M. Humada, F. Samsuri, Mojgan Hojabria, Mortaza B. Mohamed, Mohd Herwan Bin Sulaiman, Taha Hamad Dakheel
Different methods of configuration have been formulated regarding photovoltaic solar power by employing several techniques. This has been done because of the varying conditions so that the loss of power can be minimized. The main factor which decreases energy output of the photovoltaic PV solar systems is partial shadowing. The way the energy output of partially shadowed arrays varies with the system configuration used, has been studied extensively. A huge degree of disorder still exists, particularly with respect to the best modularity grade for these systems. There are two distinct sub-divisions in the systems implemented in the reconfiguration mechanism: reconfigurable solar arrays, and a switching matrix to do a reconfiguration. Using different methods, the proportions of shadowing obstructions were noted to allow for calculation of the likely shadowing losses. The outcomes of this paper on modeling and monitoring are used to evaluate the photovoltaic system with respect to shadowing losses with different levels and their reliance on the system configuration are selected. It has been found that power loss because of varying conditions is majorly due to the decrease in radiance occurring on the photovoltaic array and can be avoided through selecting the suitable configuration and connection. The simulation results show that the output characteristics of the simulator presented better results with that proposed model.
{"title":"Modeling of photovoltaic solar array under different levels of partial shadow conditions","authors":"A. M. Humada, F. Samsuri, Mojgan Hojabria, Mortaza B. Mohamed, Mohd Herwan Bin Sulaiman, Taha Hamad Dakheel","doi":"10.1109/EPEPEMC.2014.6980535","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980535","url":null,"abstract":"Different methods of configuration have been formulated regarding photovoltaic solar power by employing several techniques. This has been done because of the varying conditions so that the loss of power can be minimized. The main factor which decreases energy output of the photovoltaic PV solar systems is partial shadowing. The way the energy output of partially shadowed arrays varies with the system configuration used, has been studied extensively. A huge degree of disorder still exists, particularly with respect to the best modularity grade for these systems. There are two distinct sub-divisions in the systems implemented in the reconfiguration mechanism: reconfigurable solar arrays, and a switching matrix to do a reconfiguration. Using different methods, the proportions of shadowing obstructions were noted to allow for calculation of the likely shadowing losses. The outcomes of this paper on modeling and monitoring are used to evaluate the photovoltaic system with respect to shadowing losses with different levels and their reliance on the system configuration are selected. It has been found that power loss because of varying conditions is majorly due to the decrease in radiance occurring on the photovoltaic array and can be avoided through selecting the suitable configuration and connection. The simulation results show that the output characteristics of the simulator presented better results with that proposed model.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125946442","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980505
R. Krall, J. Krenn, A. Schmid
Due to the large magnetic relevant air gap the leakage inductance is the main inductance in a surface mounted permanent magnet machine. The major components of the leakage inductance are known as the harmonic leakage and the slot leakage inductance. This paper proposes an analytical method to determine those two leakage components for a fractional slot concentrated winding machine (FSCW) with an arbitrary phase number. Further, a comparison to a machine design with distributed winding (DTBW), having the same number of poles and fundamental flux linkage, is done. The comparison is done for FSCW machines with a double layer and single layer winding layout.
{"title":"Comparison of leakage inductance between fractional slot winding and distributed winding","authors":"R. Krall, J. Krenn, A. Schmid","doi":"10.1109/EPEPEMC.2014.6980505","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980505","url":null,"abstract":"Due to the large magnetic relevant air gap the leakage inductance is the main inductance in a surface mounted permanent magnet machine. The major components of the leakage inductance are known as the harmonic leakage and the slot leakage inductance. This paper proposes an analytical method to determine those two leakage components for a fractional slot concentrated winding machine (FSCW) with an arbitrary phase number. Further, a comparison to a machine design with distributed winding (DTBW), having the same number of poles and fundamental flux linkage, is done. The comparison is done for FSCW machines with a double layer and single layer winding layout.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125278509","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980498
F. Lee
Gallium Nitride devices are gathering momentum, with a number of recent market introductions for such applications as point of load converters (POL), off-line switching power supplies, battery chargers and motor drives. GaN devices have a much lower gate charge and lower output capacitance and, therefore, are capable of operating at a switching frequency 10 times of that of the silicon MOSFET. This might significantly impact the power density, form factor and even the current design and manufacturing practice.
{"title":"Keynote 1: Is GaN a Game Changing Device ?","authors":"F. Lee","doi":"10.1109/EPEPEMC.2014.6980498","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980498","url":null,"abstract":"Gallium Nitride devices are gathering momentum, with a number of recent market introductions for such applications as point of load converters (POL), off-line switching power supplies, battery chargers and motor drives. GaN devices have a much lower gate charge and lower output capacitance and, therefore, are capable of operating at a switching frequency 10 times of that of the silicon MOSFET. This might significantly impact the power density, form factor and even the current design and manufacturing practice.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114262618","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980624
G. Ram, V. Prasanth, P. Bauer, Eva-Maria Barthlein
On-load tap changing (OLTC) transformers are widely used for voltage control in the distribution network. The paper provides a comparative analysis of different OLTC topologies for the design of a power electronic (assisted) tap changer. Eleven different topologies are compared on the basis of voltage and current rating of the transformer windings and tap switches, using a p.u. methodology. The topologies are designed in such a way that they can provide both positive and negative compensation of the grid voltage. The p.u. comparison is a beneficial tool for OLTC designers to suitably choose the right topology based on the voltage and power levels of the network, type of solid-state switch used and the voltage regulation application.
{"title":"Comparative analysis of on-load tap changing (OLTC) transformer topologies","authors":"G. Ram, V. Prasanth, P. Bauer, Eva-Maria Barthlein","doi":"10.1109/EPEPEMC.2014.6980624","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980624","url":null,"abstract":"On-load tap changing (OLTC) transformers are widely used for voltage control in the distribution network. The paper provides a comparative analysis of different OLTC topologies for the design of a power electronic (assisted) tap changer. Eleven different topologies are compared on the basis of voltage and current rating of the transformer windings and tap switches, using a p.u. methodology. The topologies are designed in such a way that they can provide both positive and negative compensation of the grid voltage. The p.u. comparison is a beneficial tool for OLTC designers to suitably choose the right topology based on the voltage and power levels of the network, type of solid-state switch used and the voltage regulation application.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122016770","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 : 2014-12-11DOI: 10.1109/EPEPEMC.2014.6980651
Natália M. R. Santos, V. Fernão Pires, J. F. Silva
The three-level active neutral point clamped converter (ANPC) allows to overcame the problem of unequal loss distribution among semiconductor devices that appears in the classical neutral point clamped converter NPC. Another advantage of this power converter is that it can operate under faulty conditions. In this paper the study of the ANPC using a voltage sliding mode controller for a vector modulator under a semiconductor open fault is presented. The approach allows keeping the voltage of the neutral point balanced under a fault condition. Simulation results are presented in order to verify the effectiveness of the proposed control strategy under the fault condition mode.
{"title":"Fault tolerant operation of active neutral point clamped multilevel converters using a voltage sliding mode controller","authors":"Natália M. R. Santos, V. Fernão Pires, J. F. Silva","doi":"10.1109/EPEPEMC.2014.6980651","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2014.6980651","url":null,"abstract":"The three-level active neutral point clamped converter (ANPC) allows to overcame the problem of unequal loss distribution among semiconductor devices that appears in the classical neutral point clamped converter NPC. Another advantage of this power converter is that it can operate under faulty conditions. In this paper the study of the ANPC using a voltage sliding mode controller for a vector modulator under a semiconductor open fault is presented. The approach allows keeping the voltage of the neutral point balanced under a fault condition. Simulation results are presented in order to verify the effectiveness of the proposed control strategy under the fault condition mode.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129307064","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}
Subramani Chinnamuthu, P. C. Babu, R. Bayindir, S. DashS, M. Mohanty
This paper proposes a new control structure for two feeders, three phase four wire distribution systems (3P4W) operating with multi-converter unified power quality conditioner (MC-UPQC). The modified synchronous reference frame theory (MSRF) is mainly used in the new controller design. The proposed system is designed and applied for two feeders of 3P4W with UPQC. This system employed with three voltage source converter which is connected commonly to two feeder distribution systems. The proposed control scheme is simulated with 3P4W and it is efficiently compensate the voltage sag and reduce the total harmonics distortion under linear and nonlinear load conditions. The fast dynamics response of dc link capacitor is achieved with the help of Fuzzy logic controller. The neutral current flowing in series transformers of the two feeders is zero with the implementation of proposed system.
{"title":"A new control strategy with fuzzy logic technique in distribution system for power quality issues","authors":"Subramani Chinnamuthu, P. C. Babu, R. Bayindir, S. DashS, M. Mohanty","doi":"10.20508/IJRER.78587","DOIUrl":"https://doi.org/10.20508/IJRER.78587","url":null,"abstract":"This paper proposes a new control structure for two feeders, three phase four wire distribution systems (3P4W) operating with multi-converter unified power quality conditioner (MC-UPQC). The modified synchronous reference frame theory (MSRF) is mainly used in the new controller design. The proposed system is designed and applied for two feeders of 3P4W with UPQC. This system employed with three voltage source converter which is connected commonly to two feeder distribution systems. The proposed control scheme is simulated with 3P4W and it is efficiently compensate the voltage sag and reduce the total harmonics distortion under linear and nonlinear load conditions. The fast dynamics response of dc link capacitor is achieved with the help of Fuzzy logic controller. The neutral current flowing in series transformers of the two feeders is zero with the implementation of proposed system.","PeriodicalId":325670,"journal":{"name":"2014 16th International Power Electronics and Motion Control Conference and Exposition","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124623250","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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