{"title":"A Novel Control of Bi-Directional Switches in Matrix Converter","authors":"M. Tewolde, S.P. Das","doi":"10.1109/PEDES.2006.344404","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344404","url":null,"abstract":"This paper presents a novel control of bi directional switches (BBS's) used in matrix converter. An extensive literature review and experimental study have been carried out to obtain a modern solution of commutation. An improved technique and control algorithm is used for commutation of bi-directional switch. A simple voltage sensor has been developed to control the matrix converter switches. This technique is simple and effective in comparison to the existing methods. Finally, this paper includes the detailed practical issues of freewheeling path and integration of over voltage protection of BBS in practical implementation. Experimental results are demonstrated to validate the proposed control strategy of freewheeling method.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"119 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130097997","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}
{"title":"Investigations on Different Multilevel Inverter Control Techniques by Simulation","authors":"P. Chaturvedi, S.K. Jain, P. Agrawal, P.K. Modi","doi":"10.1109/PEDES.2006.344425","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344425","url":null,"abstract":"This paper presents simulation studies on different control techniques of 3- and 5- level diode clamped multilevel inverters i.e. sinusoidal PWM, selective harmonic elimination, and optimized harmonic PWM techniques. Paper contributes towards the detailed simulation and analysis of these techniques which has not been given in previous work. The performance of each technique has been investigated based upon reduction in total harmonic distortion. For simulation, Matlab/Power System Blockset/PowerGUI has been used.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"259 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134092570","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}
{"title":"Modeling and Simulation of Electromagnetic Conducted Emission Due to Power Electronics Converters","authors":"A. Farhadi, A. Jalilian","doi":"10.1109/PEDES.2006.344331","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344331","url":null,"abstract":"Electromagnetic interference (EMI) refers to the undesired generation of radiated or conducted energy in electrical systems. High-speed semiconductors are applied in power electronics converters to improve efficiency. But high frequency switching leads to generation of interference over a wide range of frequency. EMI is an inevitable problem in modern power electronic circuits. Electromagnetic compatibility (EMC), which has recently gained a high importance, is the solution against electromagnetic interference. The first step of EMC evaluation is modeling and simulation of EMI to help power electronics designers to have an estimation of EMC status in their designs. Modeling and simulation of different typical samples of power electronics converters are studied in this paper in point of view of EMC. Simulation results demonstrated noncompliance behavior of most common power electronic converters in terms of EMC.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131474917","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}
{"title":"Optimal Controller for High Frequency AC-Link Converter Induction Motor Drive System","authors":"R. Gupta, A. Wadhwani, R. Joshi","doi":"10.1109/PEDES.2006.344378","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344378","url":null,"abstract":"This paper proposes a new control algorithm for a high frequency AC-link converter (HFAC) induction motor drive system. A two-degree-of-freedom controller is proposed to improve the system performance. The controller design algorithm can be applied in an adjustable speed control system and a position control system to obtain good transient responses and good load disturbance rejection abilities. Several experimental results are shown to validate the theoretical analysis.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130701078","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}
{"title":"Improved Torque Profile of a Doubly Salient Permanent Magnet Motor using Skewed Rotor Teeth and Sinusoidal Excitation","authors":"N. Sheth, K. Rajagopal","doi":"10.1109/PEDES.2006.344374","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344374","url":null,"abstract":"This paper presents the results of a three dimensional (3-D) finite element (FE) analysis carried out to get the improved torque profile of doubly salient permanent magnet (DSPM) motor by optimum skewing of rotor teeth and type of excitation from two types of excitations namely, rectangular and sinusoidal. Effect of skewing the rotor teeth on various performance characteristics like phase flux-linkage, self and mutual inductances, detent torque, average developed torque and torque ripple have been presented. It is observed that with the increase in the skew angle of the rotor pole the phase flux-linkage and the difference between the phase inductance for phase excitation supporting or opposing the permanent magnet excitation reduces. Result of harmonic analysis of the detent torque and developed torque for both type of excitation at various skew angles are presented from which it is observed that the 4l and its multiple torque harmonics are the predominant ones for both type of torque. It is also observed that for all skew angles the sinusoidal excitation of motor with two phase excitation mode is giving more average torque in comparison to the rectangular current excitation this is also true for torque ripple if the skew angles less than 24deg. It is also observed that skewing the rotor teeth by 12deg to 15deg with sinusoidal excitation will give higher average torque with reduced ripple, so becomes the best choice.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130870069","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}
{"title":"A Novel Technique for Identification and Condition Monitoring of Nonlinear Loads in Power Systems","authors":"P. Gilreath, M. Peterson, B.N. Singh","doi":"10.1109/PEDES.2006.344311","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344311","url":null,"abstract":"This paper deals with centroid-Concordia patterns for characterization of harmonic producing three-phase loads in a power system distribution network. The three-phase currents (ia, ib, and ic) at the point of common coupling (PCC) are sensed and processed through the Concordia mathematical formulation resulting in two-phase orthogonal currents (ialpha-ibeta). The currents (ialpha-ibeta) are used to obtain the Concordia patterns needed for centroid calculation. The centroid of the Concordia pattern reveals characteristics of the load connected at the PCC. In the majority of cases, the developed Concordia patterns do not differ much from each other as the centroid remains at the origin; this leads to a failure if conventional Concordia patterns are used to discern faults and condition monitoring of loads at power system distribution. Therefore, we proposed modified Concordia pattern methods. In the modified Concordia pattern, we exploit pattern symmetry around the alpha-beta axes of the transform currents (ialpha-ibeta). The computed value of the centroid of the modified Concordia pattern can be used to develop a drift pattern of the centroid location. Using the drift pattern over time, deterioration of system condition can be monitored and discerned. The drift pattern will allow us to develop the mathematical formulation for load modeling. This is an important aspect of the proposed investigation due to an increasing proliferation of nonlinear loads on aging power system network. The proposed method will be simple, non-invasive, and require reduced data sets and memory; therefore, it may prove to be easier for real-time load modeling, condition monitoring, and condition prediction for an ever changing nature of loads on power system networks.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132933078","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}
{"title":"Ethernet Enabled Fast and Reliable Monitoring, Protection and Control of Electric Power Substation","authors":"I. Ali, M.S. Thomas","doi":"10.1109/PEDES.2006.344314","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344314","url":null,"abstract":"Communication in the electric power substation is very crucial for the entire power network reliability. This paper investigates the opportunities offered by the Ethernet technology and proposes a new Ethernet based substation communication network (SCN) architecture for fast and reliable communication as required by monitoring, protection and control functions in an electric power substation.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133272944","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}
{"title":"Open-End Winding Induction Motor Driven With Matrix Converter For Common-Mode Elimination","authors":"K. K. Mohapatra, Ned Mohan","doi":"10.1109/PEDES.2006.344385","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344385","url":null,"abstract":"In this article a novel scheme using matrix converter is proposed for control of three phase machines. The analysis shows that the scheme has several benefits. By eliminating the common mode voltage from the three phases of the machine the motor bearing current is entirely removed. The maximum insulation stress in the motor winding is limited to the peak value of input phase voltage. The power factor at the utility end is controllable. By using matrix converters for power conversion bulky capacitors are eliminated from the drive.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"725 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133282310","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}
{"title":"LMI Based Digital State Feedback Controller for a Wound Rotor Induction Drive with Guaranteed Closed Loop Stability","authors":"D. Sivanandakumar, K. Ramakrishnan","doi":"10.1109/PEDES.2006.344384","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344384","url":null,"abstract":"In this write-up, a novel approach for the design of a digital state feedback controller for the speed control of slip energy recovery system employing a wound rotor induction machine is proposed using digital redesign approach. The state feedback controllers for digital implementation are suitably redesigned in such a way that the discrete-time-system response and continuous-time response match at all sampling instants. As the digital implementation of the continuous time controller is very desirable when the designed continuous-time controller uses some recent and advanced control algorithms, the redesign problem boils down to an optimization problem minimizing the difference between the continuous-time system and discrete-time system subjected to some constraints. In this paper, the redesign problem is formulated as a generalized eigenvalue problem with linear matrix inequality constraints. The results obtained are compared with other methods. The proposed algorithm uses LQR approaches for the design of continuous-time controller and the approach is illustrated for slip energy recovery system with encouraging results.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132087756","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}
{"title":"Minimization of Losses in Radial Distribution System by using HVDS","authors":"K. Amaresh, S. Sivanagaraju, V. Sankar","doi":"10.1109/PEDES.2006.344247","DOIUrl":"https://doi.org/10.1109/PEDES.2006.344247","url":null,"abstract":"The loads in rural area are predominantly pump sets used for lift irrigation. The loads have low power factor and low load factor. Further, load density is low due to dispersal of loads. The existing distribution system consists of three-phase 11 kV/433 Volts distribution transformer with lengthy L.T Lines. In this system, the losses are high, voltage profile and reliability are unsatisfactory. In this paper, HVDS has been introduced with small capacity distribution transformers. A simple load flow technique has been used for solving radial distribution networks before and after implementation of HVDS. An advantage of implementing HVDS over LVDS system is discussed.","PeriodicalId":262597,"journal":{"name":"2006 International Conference on Power Electronic, Drives and Energy Systems","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133725092","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}