Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908271
Prathviraj Shetty, S. Dawnee
Hybrid electric vehicles (HEV) are in greater demand these days because of the increase in fuel price and environmental effects of burning fuel. Hence it is important to understand the behavior of the complete electric power train to meet the greater performance expectation from the HEV. In this paper the modeling of the entire electric power train of the HEV that includes an E-motor which is selected based on the characteristics best suited for HEV application is attempted. The E-motor in this case, Permanent Magnet Synchronous motor (PMSM) is controlled by a 3 phase 2 level voltage source inverter (VSI) whose switching is controlled by SVPWM technique. The speed and current feedbacks are taken to control the speed and torque by creating an error signal and passing it through the PI controller. The results of the PI controllers are the two voltage references from which the magnitude and reference angle is calculated and fed to the SVPWM module. The SVPWM module generates the appropriate pulses for the VSI to generate the required voltages as requested by the user. The modeling and simulation was carried out using Matlab Simulink and the proposed electric power-train is clean and efficient for potential application in hybrid electrical vehicles.
{"title":"Modeling and simulation of the complete electric power train of a hybrid electric vehicle","authors":"Prathviraj Shetty, S. Dawnee","doi":"10.1109/AICERA.2014.6908271","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908271","url":null,"abstract":"Hybrid electric vehicles (HEV) are in greater demand these days because of the increase in fuel price and environmental effects of burning fuel. Hence it is important to understand the behavior of the complete electric power train to meet the greater performance expectation from the HEV. In this paper the modeling of the entire electric power train of the HEV that includes an E-motor which is selected based on the characteristics best suited for HEV application is attempted. The E-motor in this case, Permanent Magnet Synchronous motor (PMSM) is controlled by a 3 phase 2 level voltage source inverter (VSI) whose switching is controlled by SVPWM technique. The speed and current feedbacks are taken to control the speed and torque by creating an error signal and passing it through the PI controller. The results of the PI controllers are the two voltage references from which the magnitude and reference angle is calculated and fed to the SVPWM module. The SVPWM module generates the appropriate pulses for the VSI to generate the required voltages as requested by the user. The modeling and simulation was carried out using Matlab Simulink and the proposed electric power-train is clean and efficient for potential application in hybrid electrical vehicles.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122960102","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908273
P. Ramakrishnan, M. Athira
A control algorithm for a Series Hybrid Active power Filter is proposed. The compensating signals are derived based on Dual instantaneous reactive power theory. A, DC link voltage reduction algorithm is incorporated in the model to reduce the switching stresses. The proposed scheme does not vary the compensation characteristics of the filter. Different loads are applied at different time intervals and the DC link voltage reference is calculated for each interval. Simulations have been done based on the MATLAB/Simulink platform.
{"title":"Control of SHAPF using dual instantaneous reactive power theory with minimum DC link voltage deduction algorithm","authors":"P. Ramakrishnan, M. Athira","doi":"10.1109/AICERA.2014.6908273","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908273","url":null,"abstract":"A control algorithm for a Series Hybrid Active power Filter is proposed. The compensating signals are derived based on Dual instantaneous reactive power theory. A, DC link voltage reduction algorithm is incorporated in the model to reduce the switching stresses. The proposed scheme does not vary the compensation characteristics of the filter. Different loads are applied at different time intervals and the DC link voltage reference is calculated for each interval. Simulations have been done based on the MATLAB/Simulink platform.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122982181","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908175
P. P. Shimmeer, A. Bisharathu Beevi
Zig-Zag transformer is one of the best device employed for nullifying the fundamental and zero-sequence harmonic current on the customer side under balanced voltage. The customer side neutral current becomes dangerously high under polluted distribution voltage. The proposed scheme consist of a combination of Hybrid DSTATCOM topology with a Zig-Zag transformer for solving power quality issue as well as neutral current mitigation. The topology consist of an additional capacitor, which is connected in series with the parallel branch of the hybrid DSTATCOM so as to reduce the DC side capacitor voltage. The selection of the of the series capacitor is in such a way that voltage at the dc side capacitor is reduced. An enhanced PLL (EPLL) based control algorithm is used for DSTATCOM. In this scheme, active and reactive components of a particular phase current can be extracted for the generation of reference source current even under polluted utility voltage. DC link voltage is maintained to a constant value using Fuzzy logic. Fuzzy logic controller is designed so as to change the controller gain under dynamic load disturbances. The effectiveness of the new topology is confirmed using MATLAB environment. The Zig-Zag transformer performance is verified through software as well as hardware experiment.
{"title":"Performance analysis of a hybrid DSTATCOM topology as an effective solution in distribution systems","authors":"P. P. Shimmeer, A. Bisharathu Beevi","doi":"10.1109/AICERA.2014.6908175","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908175","url":null,"abstract":"Zig-Zag transformer is one of the best device employed for nullifying the fundamental and zero-sequence harmonic current on the customer side under balanced voltage. The customer side neutral current becomes dangerously high under polluted distribution voltage. The proposed scheme consist of a combination of Hybrid DSTATCOM topology with a Zig-Zag transformer for solving power quality issue as well as neutral current mitigation. The topology consist of an additional capacitor, which is connected in series with the parallel branch of the hybrid DSTATCOM so as to reduce the DC side capacitor voltage. The selection of the of the series capacitor is in such a way that voltage at the dc side capacitor is reduced. An enhanced PLL (EPLL) based control algorithm is used for DSTATCOM. In this scheme, active and reactive components of a particular phase current can be extracted for the generation of reference source current even under polluted utility voltage. DC link voltage is maintained to a constant value using Fuzzy logic. Fuzzy logic controller is designed so as to change the controller gain under dynamic load disturbances. The effectiveness of the new topology is confirmed using MATLAB environment. The Zig-Zag transformer performance is verified through software as well as hardware experiment.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123896898","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908272
R. Mini, S. Resna, M. Dinesh
In many industrial applications, Pulse Width Modulated (PWM) inverter-fed induction motors needs long cables. The PWM inverter output voltage pulses behave like travelling waves on these cables. This phenomenon causes voltage reflection that results in over voltage at the motor terminals. Over voltage at the terminals of the motor is attributed by the rise time of the inverter pulses, length of the power cable that connects the inverter to the motor, or the disparity in impedance between the inverter, cable, and the motor. High dv/dt pulse at the inverter output terminal causes voltage reflection in the cable. One of the methods used to mitigate the voltage reflection at the input terminals of the motor is to increase the rise time of the voltage at these terminals. To accomplish this delay in voltage rise, a passive filter that consists of an LC clamp circuit can be used. This circuit helps to reduce the dv/dt value. Both the common mode and the differential mode issues are addressed by connecting the neutral of the LC clamp filter with diode to the mid-point of DC bus. Since the size of the filter required is small even this filter can be placed inside the inverter enclosure. Thus, the use of LC filter with diode reduces the voltage reflection issue and increases the life of the motor and the reliability of the drive systems.
{"title":"LC clamp filter for voltage reflection due to long cable in induction motor drives","authors":"R. Mini, S. Resna, M. Dinesh","doi":"10.1109/AICERA.2014.6908272","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908272","url":null,"abstract":"In many industrial applications, Pulse Width Modulated (PWM) inverter-fed induction motors needs long cables. The PWM inverter output voltage pulses behave like travelling waves on these cables. This phenomenon causes voltage reflection that results in over voltage at the motor terminals. Over voltage at the terminals of the motor is attributed by the rise time of the inverter pulses, length of the power cable that connects the inverter to the motor, or the disparity in impedance between the inverter, cable, and the motor. High dv/dt pulse at the inverter output terminal causes voltage reflection in the cable. One of the methods used to mitigate the voltage reflection at the input terminals of the motor is to increase the rise time of the voltage at these terminals. To accomplish this delay in voltage rise, a passive filter that consists of an LC clamp circuit can be used. This circuit helps to reduce the dv/dt value. Both the common mode and the differential mode issues are addressed by connecting the neutral of the LC clamp filter with diode to the mid-point of DC bus. Since the size of the filter required is small even this filter can be placed inside the inverter enclosure. Thus, the use of LC filter with diode reduces the voltage reflection issue and increases the life of the motor and the reliability of the drive systems.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116306872","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908241
Preethy Thankachen, Daru Anna Thomas
The paper proposes an alternative control strategy for downstream fault current interruption using a dynamic voltage restorer (DVR). In case of downstream fault large fault current will flow through DVR. And if DVR is not effectively limited it may result in voltage sag at PCC, leading the fault condition further worse. So as to control the drift of huge line current, thereby to reimpose the PCC voltage and to defend the DVR elements, a fault controlling concept is suggested for downstream fault and coupled with DVR operation. The proposed controller achieves fault current limitation by magnitude control of its injection voltage. The study results performed in the MATLAB/SIMULINK platform indicates that the discussed scheme could control the fault current value to less than nominal load current value and restores the voltage magnitude at point of connection within less time.
{"title":"Hysteresis controller based fault current interruption using DVR","authors":"Preethy Thankachen, Daru Anna Thomas","doi":"10.1109/AICERA.2014.6908241","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908241","url":null,"abstract":"The paper proposes an alternative control strategy for downstream fault current interruption using a dynamic voltage restorer (DVR). In case of downstream fault large fault current will flow through DVR. And if DVR is not effectively limited it may result in voltage sag at PCC, leading the fault condition further worse. So as to control the drift of huge line current, thereby to reimpose the PCC voltage and to defend the DVR elements, a fault controlling concept is suggested for downstream fault and coupled with DVR operation. The proposed controller achieves fault current limitation by magnitude control of its injection voltage. The study results performed in the MATLAB/SIMULINK platform indicates that the discussed scheme could control the fault current value to less than nominal load current value and restores the voltage magnitude at point of connection within less time.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127247884","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908259
Shana Moothedath, Renju Gangadharan, R. Kumari
The guidance of a launch vehicle with constraints on the impact point of the spent stages is discussed. Guidance equations for a flat Earth based model is studied and an analytical optimization algorithm called FE guidance algorithm is validated for honoring the targeted states even under the circumstances of modified initial conditions. The splash down constraint can be imposed into this existing model through a numerical optimization technique, with objective function of maximizing payload mass. Combining the merits of both these techniques a Numerico Analytical optimization algorithm is proposed that maximizes payload mass with guaranteed splash down constraint. The proposed algorithm could be run in parallel with an existing algorithm for on board guidance.
{"title":"On board trajectory optimization of a launch vehicle with splash down constraint","authors":"Shana Moothedath, Renju Gangadharan, R. Kumari","doi":"10.1109/AICERA.2014.6908259","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908259","url":null,"abstract":"The guidance of a launch vehicle with constraints on the impact point of the spent stages is discussed. Guidance equations for a flat Earth based model is studied and an analytical optimization algorithm called FE guidance algorithm is validated for honoring the targeted states even under the circumstances of modified initial conditions. The splash down constraint can be imposed into this existing model through a numerical optimization technique, with objective function of maximizing payload mass. Combining the merits of both these techniques a Numerico Analytical optimization algorithm is proposed that maximizes payload mass with guaranteed splash down constraint. The proposed algorithm could be run in parallel with an existing algorithm for on board guidance.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124830100","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908270
Naseel Ibnu Azeez, Ashwin Chandy Alex
Almost all machines have rotating parts, of which a vital and critical part is the bearing. The life of rotating machines are mainly depended on the working condition of the bearings. Detecting the health of the bearing has an important role in predective maintenance system. Bearing failures leads to safety issues and it negatively affect the working environment, in terms of machine down times, interruption of production, leading to higher manufacturing costs. The vibration signals siganture generated from a rolling element bearing delivers huge amounts of information about its structural dynamics and working conditions. The basic principle behind the vibration analysis is, the fact that any defect in a bearing gives rise to some vibration. This vibration consists of certain frequencies depending on the nature and location of the defect. The important measurement parameters of vibration are displacement, velocity and acceleration. On the basis of vibration analysis it is possible to detect and locate even very small bearing faults like false brinelling, minute wear marks etc. The vibration signal from a good bearing is compared with the vibration signal from a faulty bearing, the vibration signature generated from a defective bearing differs from the normal state vibration signature and it is determined through the shape of time domain signal peaks, the randomness of peak position and also through frequency domain characteristics.
{"title":"Detection of rolling element bearing defects by vibration signature analysis: A review","authors":"Naseel Ibnu Azeez, Ashwin Chandy Alex","doi":"10.1109/AICERA.2014.6908270","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908270","url":null,"abstract":"Almost all machines have rotating parts, of which a vital and critical part is the bearing. The life of rotating machines are mainly depended on the working condition of the bearings. Detecting the health of the bearing has an important role in predective maintenance system. Bearing failures leads to safety issues and it negatively affect the working environment, in terms of machine down times, interruption of production, leading to higher manufacturing costs. The vibration signals siganture generated from a rolling element bearing delivers huge amounts of information about its structural dynamics and working conditions. The basic principle behind the vibration analysis is, the fact that any defect in a bearing gives rise to some vibration. This vibration consists of certain frequencies depending on the nature and location of the defect. The important measurement parameters of vibration are displacement, velocity and acceleration. On the basis of vibration analysis it is possible to detect and locate even very small bearing faults like false brinelling, minute wear marks etc. The vibration signal from a good bearing is compared with the vibration signal from a faulty bearing, the vibration signature generated from a defective bearing differs from the normal state vibration signature and it is determined through the shape of time domain signal peaks, the randomness of peak position and also through frequency domain characteristics.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"312 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124253645","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908190
A. Rajeevan, P. V. Shouri, Usha Nair
The output power of a wind energy conversion system (WECS) fluctuates with wind speed variations. Accurate wind speed modeling is essential to forecast wind power changes in a site. This paper is intended to develop an autoregressive integrated moving average (ARIMA) time series model for wind speed. In ARIMA time series modeling, it is possible to change a nonstationary time series to a stationary time series by taking differences. A wind speed collection of one year from a 99MW wind farm situated in Theni, Tamil Nadu, India is used in this modeling. The developed model is used to evaluate annual reliability indices like loss of load probability (LOLP), loss of load expectation (LOLE), and loss of energy expectation (LOEE) by convolving wind farm generation model with load model of the grid. Furthermore, variations of LOLE and reliability with changes in peak load are carried out. The study illustrates that system risk index LOLE improves with decrease in peak load and WECS has high reliability to meet the changes in peak load.
{"title":"ARIMA modeling of wind speed for wind farm reliability analysis","authors":"A. Rajeevan, P. V. Shouri, Usha Nair","doi":"10.1109/AICERA.2014.6908190","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908190","url":null,"abstract":"The output power of a wind energy conversion system (WECS) fluctuates with wind speed variations. Accurate wind speed modeling is essential to forecast wind power changes in a site. This paper is intended to develop an autoregressive integrated moving average (ARIMA) time series model for wind speed. In ARIMA time series modeling, it is possible to change a nonstationary time series to a stationary time series by taking differences. A wind speed collection of one year from a 99MW wind farm situated in Theni, Tamil Nadu, India is used in this modeling. The developed model is used to evaluate annual reliability indices like loss of load probability (LOLP), loss of load expectation (LOLE), and loss of energy expectation (LOEE) by convolving wind farm generation model with load model of the grid. Furthermore, variations of LOLE and reliability with changes in peak load are carried out. The study illustrates that system risk index LOLE improves with decrease in peak load and WECS has high reliability to meet the changes in peak load.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122223045","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908212
Greeshma Chandran, Sandip Das, R. Praveen
Space rovers demands for the choice of a drive system with high performance characteristics like low inertia, high power to weight ratio, capacity to develop high acceleration, wide velocity range and high positioning accuracy. This paper focuses on the development of controller for a precision actuator as per the requirements of space environment. The design uses slotless, coreless PMBLDC motor with non axial winding topology that not only gives high torque to weight ratio and less cogging torque but also limit weight to a few hundred grams. A mathematical modeling of PMBLDC motor is included in this paper. A Triangle Pulse Width Modulation technique for Brushless Direct Current (BLDC) motor drives, with a view to attain high positioning accuracy is proposed. MATLAB/Simulink results verify that PWM control strategy with position and velocity control functionality allows sophisticated positioning applications.
{"title":"PWM based control electronics of a PMBLDC motor for hip yaw joint of a space rover application","authors":"Greeshma Chandran, Sandip Das, R. Praveen","doi":"10.1109/AICERA.2014.6908212","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908212","url":null,"abstract":"Space rovers demands for the choice of a drive system with high performance characteristics like low inertia, high power to weight ratio, capacity to develop high acceleration, wide velocity range and high positioning accuracy. This paper focuses on the development of controller for a precision actuator as per the requirements of space environment. The design uses slotless, coreless PMBLDC motor with non axial winding topology that not only gives high torque to weight ratio and less cogging torque but also limit weight to a few hundred grams. A mathematical modeling of PMBLDC motor is included in this paper. A Triangle Pulse Width Modulation technique for Brushless Direct Current (BLDC) motor drives, with a view to attain high positioning accuracy is proposed. MATLAB/Simulink results verify that PWM control strategy with position and velocity control functionality allows sophisticated positioning applications.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129962487","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 : 2014-07-24DOI: 10.1109/AICERA.2014.6908224
J. George, A. Benny
The current paper proposes a methodology for calculating switching angles for a multilevel cascaded H-bridge converter connected to varying DC sources. Here desired voltage is synthesized from separate DC sources connected to each series-connected bridges of the cascaded multilevel inverter. This is obtained by generating the suitable switching angles and thereby achieving the required fundamental frequency and the lower harmonics can be minimized. Particle Swarm Optimization (PSO) algorithm is used to find the solution for the set of equations where the input voltages are the known variables and the switching angles are the unknown variables and the Artificial Neural Networks (ANN) is trained to store solutions without excessive memory storage requirements. Switching pulse logic is designed for H-bridge. The effectiveness of the proposed system is validated by simulation using MATLAB/Simulink.
{"title":"Intelligent optimization techniques for real-time harmonics reduction in multilevel inverters","authors":"J. George, A. Benny","doi":"10.1109/AICERA.2014.6908224","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908224","url":null,"abstract":"The current paper proposes a methodology for calculating switching angles for a multilevel cascaded H-bridge converter connected to varying DC sources. Here desired voltage is synthesized from separate DC sources connected to each series-connected bridges of the cascaded multilevel inverter. This is obtained by generating the suitable switching angles and thereby achieving the required fundamental frequency and the lower harmonics can be minimized. Particle Swarm Optimization (PSO) algorithm is used to find the solution for the set of equations where the input voltages are the known variables and the switching angles are the unknown variables and the Artificial Neural Networks (ANN) is trained to store solutions without excessive memory storage requirements. Switching pulse logic is designed for H-bridge. The effectiveness of the proposed system is validated by simulation using MATLAB/Simulink.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131142763","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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