Pub Date : 2005-12-01DOI: 10.1109/PEDS.2005.1619663
C. L. Toh, N. Idris, A. Yatim, F. Patkar
Employing both DSP and FPGA in motion control will give advantages of rapid prototyping and higher switching frequency in Direct Torque Control (DTC) drive. This paper presents a high performance DTC induction motor drive with constant switching frequency and low torque and flux ripples. The experimental results prove the feasibility of the proposed controllers, which is achieved using the combination of a DSP and an FPGA.
{"title":"Design and Implementation of a Direct Torque Control of Induction Machine utilizing a Digital Signal Processor and the Field Programmable Gate Arrays","authors":"C. L. Toh, N. Idris, A. Yatim, F. Patkar","doi":"10.1109/PEDS.2005.1619663","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619663","url":null,"abstract":"Employing both DSP and FPGA in motion control will give advantages of rapid prototyping and higher switching frequency in Direct Torque Control (DTC) drive. This paper presents a high performance DTC induction motor drive with constant switching frequency and low torque and flux ripples. The experimental results prove the feasibility of the proposed controllers, which is achieved using the combination of a DSP and an FPGA.","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127358556","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 : 2005-12-01DOI: 10.1109/PEDS.2005.1619955
Yuang-Shung Lee, Chia-Hui Kao, Wei-Yen Wang
Electricity is widely applied in many aspects of modern life. Precise forecasting of electricity consumption may not only reduce operational and maintenance cost for power companies but also enhance the reliability of power supply systems, as well as avoid shortage of supply that causes damage and inconvenience to customers. In this paper, load forecasting is facilitated by a so-called BMF fuzzy neural network, which features a structure adjusted by genetic algorithm. The purpose is to obtain better control points and weights, so as to ensure sound performance. Seven networks are constructed in correspondence with the seven different electrical loading models from Monday to Sunday. Results of the simulation reflect the forecasted loading in winter and summer months
{"title":"BMF Fuzzy Neural Network with Genetic Algorithm for Forecasting Electric Load","authors":"Yuang-Shung Lee, Chia-Hui Kao, Wei-Yen Wang","doi":"10.1109/PEDS.2005.1619955","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619955","url":null,"abstract":"Electricity is widely applied in many aspects of modern life. Precise forecasting of electricity consumption may not only reduce operational and maintenance cost for power companies but also enhance the reliability of power supply systems, as well as avoid shortage of supply that causes damage and inconvenience to customers. In this paper, load forecasting is facilitated by a so-called BMF fuzzy neural network, which features a structure adjusted by genetic algorithm. The purpose is to obtain better control points and weights, so as to ensure sound performance. Seven networks are constructed in correspondence with the seven different electrical loading models from Monday to Sunday. Results of the simulation reflect the forecasted loading in winter and summer months","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115367060","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619947
P. Anandavel, K. Rajambal, C. Chellamuthu
This paper discusses the performance of a grid connected variable speed wind energy conversion system consisting of a wind turbine coupled to a permanent magnet synchronous generator (PMSG) through a gearbox. The generator output voltage which varies with wind velocity and grid voltage is rectified and fed to a DC/DC chopper. The duty ratio of the chopper is adjusted to extract maximum power from the wind turbine. The maximized power is fed to the local grid at the required voltage and frequency using a PWM inverter. The mathematical model of the wind energy conversion system is developed using MATLAB. Simulation is carried out to identify the optimum duty ratio and modulation index for varying wind velocities and grid voltages. The simulation data are used to design a neuro controller for power optimization.
{"title":"Power Optimization in a Grid-Connected Wind Energy Conversion System","authors":"P. Anandavel, K. Rajambal, C. Chellamuthu","doi":"10.1109/PEDS.2005.1619947","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619947","url":null,"abstract":"This paper discusses the performance of a grid connected variable speed wind energy conversion system consisting of a wind turbine coupled to a permanent magnet synchronous generator (PMSG) through a gearbox. The generator output voltage which varies with wind velocity and grid voltage is rectified and fed to a DC/DC chopper. The duty ratio of the chopper is adjusted to extract maximum power from the wind turbine. The maximized power is fed to the local grid at the required voltage and frequency using a PWM inverter. The mathematical model of the wind energy conversion system is developed using MATLAB. Simulation is carried out to identify the optimum duty ratio and modulation index for varying wind velocities and grid voltages. The simulation data are used to design a neuro controller for power optimization.","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124398293","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619656
E. D. Monica, W. Stefanutti, P. Mattavelli, E. Tedeschi, P. Tenti, S. Saggini
A digital control technique for voltage regulation module (VRM) is investigated, which is based on a predictive current regulator. Due to the adaptive-voltage-positioning (AVP) of the VRM, the controlled variable includes a combination of output voltage and inductor current. Besides the predictive regulator, a disturbance observer is used for compensation of input voltage variations and any other source of errors, such as dead-times, parameter and model mismatches. Even if aimed to an integrated digital controller, experimental investigation has been performed using discrete components, implementing the digital control in a field programmable gate array (FPGA). Experimental results on a synchronous buck DC-DC converter confirm the properties of the predictive control
{"title":"Predictive Digital Control for Voltage Regulation Module Applications","authors":"E. D. Monica, W. Stefanutti, P. Mattavelli, E. Tedeschi, P. Tenti, S. Saggini","doi":"10.1109/PEDS.2005.1619656","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619656","url":null,"abstract":"A digital control technique for voltage regulation module (VRM) is investigated, which is based on a predictive current regulator. Due to the adaptive-voltage-positioning (AVP) of the VRM, the controlled variable includes a combination of output voltage and inductor current. Besides the predictive regulator, a disturbance observer is used for compensation of input voltage variations and any other source of errors, such as dead-times, parameter and model mismatches. Even if aimed to an integrated digital controller, experimental investigation has been performed using discrete components, implementing the digital control in a field programmable gate array (FPGA). Experimental results on a synchronous buck DC-DC converter confirm the properties of the predictive control","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124264363","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619849
Cheng-Hu Chen, M. Cheng
This paper presents the design, analysis, and implementation of a high performance and cost effective sensorless control scheme for the extensively used brushless DC motors (BLDCMs). Taking into consideration cost and ease of implementation, the commutation signals are obtained without the motor neutral voltage, multistage analog filters, A/D converter, and the complex digital phase shift (delay) circuit which are indispensable in the conventional sensorless control algorithms. Instead of detecting the zero crossing point of the non-excited phase back EMF to the neutral voltage, the commutation signals are extracted directly from the specific average terminal voltages with simple RC circuits and comparators in this study. Since the neutral voltage is not needed, the extracted commutation signal is insensitive to the common mode noise, hence the low speed performance is superior to the conventional methods. Moreover, the complex phase shift circuit has been eliminated. As a result, the control algorithm can be easily interfaced with the cost effective commercial Hall effect sensor based commutation ICs. Because of the inherent low cost property, the proposed algorithm is particularly suitable for cost sensitive products such as air purifiers, air blowers, cooling fans, and related home appliances. Theoretical analysis and experimental results show that the proposed control algorithm exhibits superior performance over a wide operation range when compared with the conventional solutions
{"title":"A New Sensorless Control Scheme for Brushless DC Motors without Phase Shift Circuit","authors":"Cheng-Hu Chen, M. Cheng","doi":"10.1109/PEDS.2005.1619849","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619849","url":null,"abstract":"This paper presents the design, analysis, and implementation of a high performance and cost effective sensorless control scheme for the extensively used brushless DC motors (BLDCMs). Taking into consideration cost and ease of implementation, the commutation signals are obtained without the motor neutral voltage, multistage analog filters, A/D converter, and the complex digital phase shift (delay) circuit which are indispensable in the conventional sensorless control algorithms. Instead of detecting the zero crossing point of the non-excited phase back EMF to the neutral voltage, the commutation signals are extracted directly from the specific average terminal voltages with simple RC circuits and comparators in this study. Since the neutral voltage is not needed, the extracted commutation signal is insensitive to the common mode noise, hence the low speed performance is superior to the conventional methods. Moreover, the complex phase shift circuit has been eliminated. As a result, the control algorithm can be easily interfaced with the cost effective commercial Hall effect sensor based commutation ICs. Because of the inherent low cost property, the proposed algorithm is particularly suitable for cost sensitive products such as air purifiers, air blowers, cooling fans, and related home appliances. Theoretical analysis and experimental results show that the proposed control algorithm exhibits superior performance over a wide operation range when compared with the conventional solutions","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616783","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619822
K. Rajambal, C. Chellamuthu
This paper focuses on the controller designs for an isolated wind electric generator supplying power to heating and voltage sensitive loads. The wind driven self-excited induction generator (SEIG) and other network components are modeled and simulated using Matlab/Simulink. The variable voltage and frequency of the generator is first rectified and the DC power is then transferred to the load through a DC link converter. By adjusting the modulation index of the PWM inverter, either maximum power can be obtained from the system or the terminal voltage can be maintained constant under varying wind velocities and load conditions. The design of neuro controllers is presented: 1) to maximize the power extraction for heating type of loads and 2) to regulate the terminal voltage for voltage sensitive loads.
{"title":"Intelligent Controllers for an Isolated Wind Energy Conversion Scheme","authors":"K. Rajambal, C. Chellamuthu","doi":"10.1109/PEDS.2005.1619822","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619822","url":null,"abstract":"This paper focuses on the controller designs for an isolated wind electric generator supplying power to heating and voltage sensitive loads. The wind driven self-excited induction generator (SEIG) and other network components are modeled and simulated using Matlab/Simulink. The variable voltage and frequency of the generator is first rectified and the DC power is then transferred to the load through a DC link converter. By adjusting the modulation index of the PWM inverter, either maximum power can be obtained from the system or the terminal voltage can be maintained constant under varying wind velocities and load conditions. The design of neuro controllers is presented: 1) to maximize the power extraction for heating type of loads and 2) to regulate the terminal voltage for voltage sensitive loads.","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116655549","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619744
N. Hamzah, A. Mohamed, A. Hussain
This paper proposed a new method to locate the source of voltage sag from the measurements taken at the point of common coupling (PCC) which is the point of connection between utility and customer in a power distribution system. The proposed method uses the RMS current and power factor angle, which are the measured parameters at the PCC. The product of the RMS current and the power factor angle at the PCC is then used to locate the source of voltage sag. A graph of this product against time is plotted and by examining the value of the product at the beginning of the sag, the voltage sag source location is determined. A positive value indicates the source of voltage sag is from the customer side and a negative value indicates the source of voltage sag is from the utility side. The proposed method has been verified by simulations and the results are proven to be accurate
{"title":"Locating Voltage Sag Source At The Point Of Common Coupling In Industrial Distribution Systems","authors":"N. Hamzah, A. Mohamed, A. Hussain","doi":"10.1109/PEDS.2005.1619744","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619744","url":null,"abstract":"This paper proposed a new method to locate the source of voltage sag from the measurements taken at the point of common coupling (PCC) which is the point of connection between utility and customer in a power distribution system. The proposed method uses the RMS current and power factor angle, which are the measured parameters at the PCC. The product of the RMS current and the power factor angle at the PCC is then used to locate the source of voltage sag. A graph of this product against time is plotted and by examining the value of the product at the beginning of the sag, the voltage sag source location is determined. A positive value indicates the source of voltage sag is from the customer side and a negative value indicates the source of voltage sag is from the utility side. The proposed method has been verified by simulations and the results are proven to be accurate","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117172940","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619690
Yan Jia, R. Shibata, N. Yamamura, M. Ishida
A control method for prolonging the service life of battery bank in stand-alone renewable energy system using electric double layer capacitor (EDLC) is presented. Recently, it has become one of the main problem needed to be solved urgently in future stand-alone renewable energy system that the service life of battery bank is shortened due to the fluctuant output power caused by varied weather condition, with higher cost and power loss. In this paper, to prolong the service life of battery bank by realizing smoothed power supply to battery bank, a bi-directional buck/boost topology and its control method using electric double layer capacitor (EDLC) is proposed, Simulation in PSIM and experiment are carried out in order to confirm the validity of the proposed method. And the simulation parameters range is identified according to the smooth level of battery current output. The experiment result is better agreed with the anticipated design and simulation results when the higher harmonic frequency varies under the appointed range of frequency and fluctuation amplitude
{"title":"A Control Method of Prolonging the Service Life of Battery in Stand-alone Renewable Energy System using Electric Double Layer Capacitor (EDLC)","authors":"Yan Jia, R. Shibata, N. Yamamura, M. Ishida","doi":"10.1109/PEDS.2005.1619690","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619690","url":null,"abstract":"A control method for prolonging the service life of battery bank in stand-alone renewable energy system using electric double layer capacitor (EDLC) is presented. Recently, it has become one of the main problem needed to be solved urgently in future stand-alone renewable energy system that the service life of battery bank is shortened due to the fluctuant output power caused by varied weather condition, with higher cost and power loss. In this paper, to prolong the service life of battery bank by realizing smoothed power supply to battery bank, a bi-directional buck/boost topology and its control method using electric double layer capacitor (EDLC) is proposed, Simulation in PSIM and experiment are carried out in order to confirm the validity of the proposed method. And the simulation parameters range is identified according to the smooth level of battery current output. The experiment result is better agreed with the anticipated design and simulation results when the higher harmonic frequency varies under the appointed range of frequency and fluctuation amplitude","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127295826","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619763
M. Hosseini Aghdam, S. Fathi, A. Ghasemi
Static power converters can be analyzed by several powerful computer simulation tools. In the case of complex circuits such as multilevel inverters, they are usually modeled as a set of switch. This modeling method results in convergence and long run-time problems. This paper proposes functional simulation model for the optimized harmonic stepped-waveform (OHSW) multilevel voltage-source inverter (VSI) which is based on the switching function concept. Using this method the memory and the simulation run-time minimized and the converter can be effectively modeled according to its function, rather than its topology.
{"title":"Modeling and Simulation of Three-Phase OHSW Multilevel Voltage-Source Inverter by Means of Switching Functions","authors":"M. Hosseini Aghdam, S. Fathi, A. Ghasemi","doi":"10.1109/PEDS.2005.1619763","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619763","url":null,"abstract":"Static power converters can be analyzed by several powerful computer simulation tools. In the case of complex circuits such as multilevel inverters, they are usually modeled as a set of switch. This modeling method results in convergence and long run-time problems. This paper proposes functional simulation model for the optimized harmonic stepped-waveform (OHSW) multilevel voltage-source inverter (VSI) which is based on the switching function concept. Using this method the memory and the simulation run-time minimized and the converter can be effectively modeled according to its function, rather than its topology.","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125173459","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 : 2005-11-28DOI: 10.1109/PEDS.2005.1619888
K. Oranpiroj, S. Premrudeepreechacharn, Y. Kumsuwan, T. Boonsai, C. Nayar
Presently available voltage sag compensators are unable to handle neutral current caused by unbalanced and/or nonlinear loads or unbalanced source. In this paper, a 3-phase, 4-wire voltage sag compensator base on 3 dimensional voltage space vector is proposed which can handle the neutral current under voltage sag and nonlinear load conditions. A computer simulation model using PSIM has been developed to analyses the performance of the systems and its effectiveness to mitigate voltage sags
{"title":"A 3-Phase 4-Wire Voltage Sag Compensator Based on Three Dimensions Space Vector","authors":"K. Oranpiroj, S. Premrudeepreechacharn, Y. Kumsuwan, T. Boonsai, C. Nayar","doi":"10.1109/PEDS.2005.1619888","DOIUrl":"https://doi.org/10.1109/PEDS.2005.1619888","url":null,"abstract":"Presently available voltage sag compensators are unable to handle neutral current caused by unbalanced and/or nonlinear loads or unbalanced source. In this paper, a 3-phase, 4-wire voltage sag compensator base on 3 dimensional voltage space vector is proposed which can handle the neutral current under voltage sag and nonlinear load conditions. A computer simulation model using PSIM has been developed to analyses the performance of the systems and its effectiveness to mitigate voltage sags","PeriodicalId":140600,"journal":{"name":"2005 International Conference on Power Electronics and Drives Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125951675","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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