Pub Date : 2014-10-01DOI: 10.1109/IECON.2014.7048673
Marc Hagemeyer, J. Solanki, N. Fröhleke, J. Böcker, A. Averberg, P. Wallmeier
In this paper, a commonly reported single-phase four-switch AC chopper topology is compared with a six-switch topology in terms of the total harmonic distortion (THD) of the input current, power factor (PF), commutation behavior, robustness and efficiency. Working principles of both topologies are presented along with simulation results. Based on a comparison of the findings, the four-switch topology is found to be better choice for the given application. Thus, the implementation of a four-switch topology is carried out at a power level of 10 kW. Experimental evaluation is carried out in order to verify the suitability of the circuit for the intended application. The experimental setup validates the findings of the simulations. Thus, the proposed approach is a practical way to improve input current THD and PF compared to thyristor choppers.
{"title":"Comparison of PWM AC chopper topologies","authors":"Marc Hagemeyer, J. Solanki, N. Fröhleke, J. Böcker, A. Averberg, P. Wallmeier","doi":"10.1109/IECON.2014.7048673","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048673","url":null,"abstract":"In this paper, a commonly reported single-phase four-switch AC chopper topology is compared with a six-switch topology in terms of the total harmonic distortion (THD) of the input current, power factor (PF), commutation behavior, robustness and efficiency. Working principles of both topologies are presented along with simulation results. Based on a comparison of the findings, the four-switch topology is found to be better choice for the given application. Thus, the implementation of a four-switch topology is carried out at a power level of 10 kW. Experimental evaluation is carried out in order to verify the suitability of the circuit for the intended application. The experimental setup validates the findings of the simulations. Thus, the proposed approach is a practical way to improve input current THD and PF compared to thyristor choppers.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125070992","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 : 2014-10-01DOI: 10.1109/IECON.2014.7049021
Philipp Klein, Dirk Benyoucef, J. Mercklé, D. Abdeslam
Our goal is to successively build and publish a catalog of appliance characteristics. This is a fundamental basis for Non-Intrusive Load Monitoring (NILM) because it helps to structure the multitude of different appliances by grouping them in classes. In this paper we investigate time series signatures of electric household appliances, so called "fingerprints". We describe a methodology to find similarities in the loads' signatures that currently relies on visual inspection. First results are discussed on the basis of three types of equipment.
{"title":"Analysis of fingerprints of electric appliances as starting point for an appliance characteristics catalog","authors":"Philipp Klein, Dirk Benyoucef, J. Mercklé, D. Abdeslam","doi":"10.1109/IECON.2014.7049021","DOIUrl":"https://doi.org/10.1109/IECON.2014.7049021","url":null,"abstract":"Our goal is to successively build and publish a catalog of appliance characteristics. This is a fundamental basis for Non-Intrusive Load Monitoring (NILM) because it helps to structure the multitude of different appliances by grouping them in classes. In this paper we investigate time series signatures of electric household appliances, so called \"fingerprints\". We describe a methodology to find similarities in the loads' signatures that currently relies on visual inspection. First results are discussed on the basis of three types of equipment.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126105404","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 : 2014-10-01DOI: 10.1109/IECON.2014.7049043
F. Ferrese, Q. Dong, S. Biswas, Jason Batcho
This paper presents a novel method of control system design for nonlinear interconnected large-scale systems. Conventional control design techniques often involve linearization of the system model with respect to an operating state, which may lead to incorrect control performance for systems that are highly nonlinear and interconnected. In this paper, a decentralized control design consisting of a PI controller with constant feedback gains is considered. Then a nonlinear optimal control method based on integral minimum principle of Pontryagin is developed. In this method, the controller performance is defined using a standard quadratic cost function, and the control law is defined using the PI structure with constant feedback gain. The effectiveness of the developed control scheme shows that the controller is capable of maintaining the desired water level in the four tanks.
{"title":"Decentralized control of coupled nonlinear dynamic systems with application to quadruple-tank process","authors":"F. Ferrese, Q. Dong, S. Biswas, Jason Batcho","doi":"10.1109/IECON.2014.7049043","DOIUrl":"https://doi.org/10.1109/IECON.2014.7049043","url":null,"abstract":"This paper presents a novel method of control system design for nonlinear interconnected large-scale systems. Conventional control design techniques often involve linearization of the system model with respect to an operating state, which may lead to incorrect control performance for systems that are highly nonlinear and interconnected. In this paper, a decentralized control design consisting of a PI controller with constant feedback gains is considered. Then a nonlinear optimal control method based on integral minimum principle of Pontryagin is developed. In this method, the controller performance is defined using a standard quadratic cost function, and the control law is defined using the PI structure with constant feedback gain. The effectiveness of the developed control scheme shows that the controller is capable of maintaining the desired water level in the four tanks.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123787548","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 : 2014-10-01DOI: 10.1109/IECON.2014.7049183
T. Todorcevic, P. Bauer, J. Ferreira, R. V. Kessel
This paper presents a modulation strategy for wide voltage output in a bidirectional modular multilevel dc-dc power electronic converter for wave energy extraction using Electro Active Polymer Wave Energy Converters (EAPWECs). The chosen electrical power converter uses a 10 kV, low current bidirectional dc-dc modular multilevel topology with Dual Active Bridges (DABs) as a basis for each module. This paper proposes a modulation method consisting of several variable frequency DAB modulation modes and explains their operating areas and limitations. Through a simulation model it is shown how the control for the multilevel converter is implemented. Finally, loss estimation is performed using the developed loss model, which was previously validated on an experimental setup.
{"title":"A modulation strategy for wide voltage output in DAB based DC-DC modular multilevel converter","authors":"T. Todorcevic, P. Bauer, J. Ferreira, R. V. Kessel","doi":"10.1109/IECON.2014.7049183","DOIUrl":"https://doi.org/10.1109/IECON.2014.7049183","url":null,"abstract":"This paper presents a modulation strategy for wide voltage output in a bidirectional modular multilevel dc-dc power electronic converter for wave energy extraction using Electro Active Polymer Wave Energy Converters (EAPWECs). The chosen electrical power converter uses a 10 kV, low current bidirectional dc-dc modular multilevel topology with Dual Active Bridges (DABs) as a basis for each module. This paper proposes a modulation method consisting of several variable frequency DAB modulation modes and explains their operating areas and limitations. Through a simulation model it is shown how the control for the multilevel converter is implemented. Finally, loss estimation is performed using the developed loss model, which was previously validated on an experimental setup.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126927453","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 : 2014-10-01DOI: 10.1109/IECON.2014.7048917
Yuuki Fujita, M. Izutsu, S. Hatakeyama
This paper gives a realization of a swinging up and stabilizing control for a twin furuta pendulums. The twin furuta pendulums has two inverted pendulums which placed at direct drive motor. A control method is a switching of stabilization control and swing-up control. A LQ optimal control is used for stabilization of the pendulums in the neighborhood of upright positions. The effectiveness of the energy control was showed by experimental result. Then, we analyze that the two pendulums simultaneous go to the neighborhood of upright positions. Further, the mechanical structure is evaluated based on the natural angular frequency of each pendulum length and the condition number of controllability matrix of the linearized twin furuta pendulums.
{"title":"Swing-up and stabilization control of twin furuta pendulums by energy control","authors":"Yuuki Fujita, M. Izutsu, S. Hatakeyama","doi":"10.1109/IECON.2014.7048917","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048917","url":null,"abstract":"This paper gives a realization of a swinging up and stabilizing control for a twin furuta pendulums. The twin furuta pendulums has two inverted pendulums which placed at direct drive motor. A control method is a switching of stabilization control and swing-up control. A LQ optimal control is used for stabilization of the pendulums in the neighborhood of upright positions. The effectiveness of the energy control was showed by experimental result. Then, we analyze that the two pendulums simultaneous go to the neighborhood of upright positions. Further, the mechanical structure is evaluated based on the natural angular frequency of each pendulum length and the condition number of controllability matrix of the linearized twin furuta pendulums.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114885626","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 : 2014-10-01DOI: 10.1109/IECON.2014.7048510
A. Veksler, T. Johansen, R. Skjetne, E. Mathiesen
A thrust allocation method with a functionality to assist power management systems by using the hull of the ship as a store of potential energy in the field of environmental forces has been recently proposed and demonstrated to work in simulation. This functionality allows the thrust allocation algorithm to decrease the power consumption in the thrusters when a sharp increase in power consumption is demanded elsewhere on the ship. This way, the high-frequency part of the load variations on the power plant can be reduced, at the expense of minor (typically less than 1 meter) variations in the position of the vessel. The advantages from reduced variations in load include reduced wear-and-tear of the power plant, more stable frequency on the electric grid, reduced risk of blackout due to underfrequency, and more reliable synchronization when connecting additional generators or connecting bus segments. In the present work, this functionality is improved further by continuously monitoring the environmental forces and modifying the setpoint of the dynamic positioning algorithm to place the vessel a short distance (e.g. 20 cm) in the direction of steepest increase of the environmental force potential, thus maximizing the available potential energy. The increased potential energy creates additional capacity for assisting the power plant, which is shown in simulation to be significant.
{"title":"Reducing power transients in diesel-electric dynamically positioned ships using re-positioning","authors":"A. Veksler, T. Johansen, R. Skjetne, E. Mathiesen","doi":"10.1109/IECON.2014.7048510","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048510","url":null,"abstract":"A thrust allocation method with a functionality to assist power management systems by using the hull of the ship as a store of potential energy in the field of environmental forces has been recently proposed and demonstrated to work in simulation. This functionality allows the thrust allocation algorithm to decrease the power consumption in the thrusters when a sharp increase in power consumption is demanded elsewhere on the ship. This way, the high-frequency part of the load variations on the power plant can be reduced, at the expense of minor (typically less than 1 meter) variations in the position of the vessel. The advantages from reduced variations in load include reduced wear-and-tear of the power plant, more stable frequency on the electric grid, reduced risk of blackout due to underfrequency, and more reliable synchronization when connecting additional generators or connecting bus segments. In the present work, this functionality is improved further by continuously monitoring the environmental forces and modifying the setpoint of the dynamic positioning algorithm to place the vessel a short distance (e.g. 20 cm) in the direction of steepest increase of the environmental force potential, thus maximizing the available potential energy. The increased potential energy creates additional capacity for assisting the power plant, which is shown in simulation to be significant.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114941307","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 : 2014-10-01DOI: 10.1109/IECON.2014.7048968
N. Nguyen, D. Flieller, Xavier Kestelyn, Tiago José dos Santos Moraes, É. Semail
An original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions. Based on the existing solutions [i]opt1 (without zero sequence of current constraint) and [i]opt2 (with zero sequence constraint), this new expression of currents [i]opt3 is obtained by means of a geometrical representation and can be applied to open-circuit, defect of current regulation, current saturation and machine phase short-circuit fault. Simulation results are presented to validate the proposed approach.
{"title":"Analytical optimal currents for multiphase PMSMs under fault conditions and saturation","authors":"N. Nguyen, D. Flieller, Xavier Kestelyn, Tiago José dos Santos Moraes, É. Semail","doi":"10.1109/IECON.2014.7048968","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048968","url":null,"abstract":"An original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions. Based on the existing solutions [i]opt1 (without zero sequence of current constraint) and [i]opt2 (with zero sequence constraint), this new expression of currents [i]opt3 is obtained by means of a geometrical representation and can be applied to open-circuit, defect of current regulation, current saturation and machine phase short-circuit fault. Simulation results are presented to validate the proposed approach.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115028438","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 : 2014-10-01DOI: 10.1109/IECON.2014.7049161
B. Vermulst, J. Duarte, C. Wijnands, E. Lomonova
An approach for three-phase AC to DC conversion is proposed, which consists of a single-stage while offering galvanic isolation, soft-switching, bi-directional power flow and a significant reduction of inductive and capacitive energy storage. Two elements enable this approach, namely a neutral voltage-lift capacitor and a Quad Active Bridge (QAB) converter. Moreover, a control strategy is described and a detailed converter analysis is given.
{"title":"Single-stage three-phase AC to DC conversion with isolation and Bi-directional power flow","authors":"B. Vermulst, J. Duarte, C. Wijnands, E. Lomonova","doi":"10.1109/IECON.2014.7049161","DOIUrl":"https://doi.org/10.1109/IECON.2014.7049161","url":null,"abstract":"An approach for three-phase AC to DC conversion is proposed, which consists of a single-stage while offering galvanic isolation, soft-switching, bi-directional power flow and a significant reduction of inductive and capacitive energy storage. Two elements enable this approach, namely a neutral voltage-lift capacitor and a Quad Active Bridge (QAB) converter. Moreover, a control strategy is described and a detailed converter analysis is given.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115572415","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 : 2014-10-01DOI: 10.1109/IECON.2014.7048631
R. S. Farswan, B. G. Fernandes
To improve the reliability and efficiency of grid tied inverters, it is suggested to replace some of the fully controllable devices by semi-controllable devices like thyristor. A modification for the HERIC topology is proposed, wherein the upper two switches of inverter leg and additional series connected switches for freewheeling are replaced by thyristors. The efficiency and reliability of full bridge transformerless inverter, full bridge transformer based inverter, HERIC transformer-less inverter and proposed transformer based inverter are calculated. It is shown that the proposed change not only improves reliability but also the efficiency. Calculated efficiency is around 98% and calculated failure rate of inverter stage is 4150 FIT (Failures In Time = 10-9 failures per hour). These figures are better than those reported for the other popular topologies. Simulation results of the grid tied inverter feeding power at unity power factor are given.
{"title":"A low cost high reliable hybrid switch single phase grid-tied inverter","authors":"R. S. Farswan, B. G. Fernandes","doi":"10.1109/IECON.2014.7048631","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048631","url":null,"abstract":"To improve the reliability and efficiency of grid tied inverters, it is suggested to replace some of the fully controllable devices by semi-controllable devices like thyristor. A modification for the HERIC topology is proposed, wherein the upper two switches of inverter leg and additional series connected switches for freewheeling are replaced by thyristors. The efficiency and reliability of full bridge transformerless inverter, full bridge transformer based inverter, HERIC transformer-less inverter and proposed transformer based inverter are calculated. It is shown that the proposed change not only improves reliability but also the efficiency. Calculated efficiency is around 98% and calculated failure rate of inverter stage is 4150 FIT (Failures In Time = 10-9 failures per hour). These figures are better than those reported for the other popular topologies. Simulation results of the grid tied inverter feeding power at unity power factor are given.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115991359","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 : 2014-10-01DOI: 10.1109/IECON.2014.7048654
S. C. Ferreira, R. Pereira, R. Gonzatti, Carlos Henrique da Silva, Luiz Eduardo Borges da Silva, G. Lambert-Torres, R. Pereira
This work presents a comparison between two adaptive filters applied to harmonic and reactive power detection in power electronics conditioners. The objective is to demonstrate their ability of tracking the signal variations without the use of synchronization techniques, with fast dynamic response and low computational burden. The algorithms are simulated and implemented in DSP TMS320F2812 for power electronics appliances. Important aspects concerning the computational efficiency, convergence speed, steady-state error are analyzed, in order to present the advantages of adaptive filters over the synchronous reference frame and algorithms dependents on PLL techniques.
{"title":"Adaptive notch filters: Comparison and applications in power conditioning","authors":"S. C. Ferreira, R. Pereira, R. Gonzatti, Carlos Henrique da Silva, Luiz Eduardo Borges da Silva, G. Lambert-Torres, R. Pereira","doi":"10.1109/IECON.2014.7048654","DOIUrl":"https://doi.org/10.1109/IECON.2014.7048654","url":null,"abstract":"This work presents a comparison between two adaptive filters applied to harmonic and reactive power detection in power electronics conditioners. The objective is to demonstrate their ability of tracking the signal variations without the use of synchronization techniques, with fast dynamic response and low computational burden. The algorithms are simulated and implemented in DSP TMS320F2812 for power electronics appliances. Important aspects concerning the computational efficiency, convergence speed, steady-state error are analyzed, in order to present the advantages of adaptive filters over the synchronous reference frame and algorithms dependents on PLL techniques.","PeriodicalId":228897,"journal":{"name":"IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122525436","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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