Pub Date : 2012-09-13DOI: 10.1007/978-81-322-0740-5_45
Y. Singh, A. Kumar, R. Mitra
{"title":"Design of ANFIS controller based on fusion function for rotary inverted pendulum","authors":"Y. Singh, A. Kumar, R. Mitra","doi":"10.1007/978-81-322-0740-5_45","DOIUrl":"https://doi.org/10.1007/978-81-322-0740-5_45","url":null,"abstract":"","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126997042","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302061
N. Yadaiah, A. Kumar, Y. M. Reddy
This paper presents development and implementation of DSP based control of constant frequency and average current mode of Boost converter for power factor correction of Single phase low and medium power applications. It is implemented through average current mode control operation of boost converter with feedforward and PI controller with saturation correction scheme. Digital controller with constant frequency, discontinuous and continuous mode of boost converter operation for universal line voltage applications is presented. The proposed method exposes the enhanced performance and comparing with existing methods.
{"title":"DSP Based control of constant frequency and average current mode of Boost converter for power factor correction (PFC)","authors":"N. Yadaiah, A. Kumar, Y. M. Reddy","doi":"10.1109/APCET.2012.6302061","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302061","url":null,"abstract":"This paper presents development and implementation of DSP based control of constant frequency and average current mode of Boost converter for power factor correction of Single phase low and medium power applications. It is implemented through average current mode control operation of boost converter with feedforward and PI controller with saturation correction scheme. Digital controller with constant frequency, discontinuous and continuous mode of boost converter operation for universal line voltage applications is presented. The proposed method exposes the enhanced performance and comparing with existing methods.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131441054","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 : 2012-09-13DOI: 10.1109/APCET.2012.6301994
K. Suneeta, J. Amarnath, S. Kamakshaiah
In this paper, a linear programming algorithm is proposed for determining a measure of market concentration in congested transmission systems. The linear program uses the effects of congestors on system to derate line limits of each transmission line. The linear program uses transmission line constraints with derated line limits, generation constraints to calculate maximum SIC for group of buyers and sellers on the system. The results of the linear program provide information regarding maximum amount of power the buyers can import, as well as amount of generation each seller can provide towards the simultaneous interchange. When only few of the available sellers can participate in the maximum SIC of the buyers, the market of available generation is referred to as concentrated. Each seller's contribution, as determined by the SIC algorithm, can be used in determining Herfindahl-Hirschman index (HHI) of concentration for the market. The resulting HHI value can then compared to government standards for HHI regarding market power in the electricity industry. Finally, sample applications of maximum SIC algorithm are examined. These examples are used to discuss the ramifications of congestion on transmission system's concentration and the usefulness of the derated line limit solution method for determining market concentration. In this paper (128 bus system of Andhra Pradesh state power grid) a real time system is tested and the results have been presented and analyzed.
{"title":"Evaluating market power in congested power systems in real time system of Andhra Pradesh state power grid","authors":"K. Suneeta, J. Amarnath, S. Kamakshaiah","doi":"10.1109/APCET.2012.6301994","DOIUrl":"https://doi.org/10.1109/APCET.2012.6301994","url":null,"abstract":"In this paper, a linear programming algorithm is proposed for determining a measure of market concentration in congested transmission systems. The linear program uses the effects of congestors on system to derate line limits of each transmission line. The linear program uses transmission line constraints with derated line limits, generation constraints to calculate maximum SIC for group of buyers and sellers on the system. The results of the linear program provide information regarding maximum amount of power the buyers can import, as well as amount of generation each seller can provide towards the simultaneous interchange. When only few of the available sellers can participate in the maximum SIC of the buyers, the market of available generation is referred to as concentrated. Each seller's contribution, as determined by the SIC algorithm, can be used in determining Herfindahl-Hirschman index (HHI) of concentration for the market. The resulting HHI value can then compared to government standards for HHI regarding market power in the electricity industry. Finally, sample applications of maximum SIC algorithm are examined. These examples are used to discuss the ramifications of congestion on transmission system's concentration and the usefulness of the derated line limit solution method for determining market concentration. In this paper (128 bus system of Andhra Pradesh state power grid) a real time system is tested and the results have been presented and analyzed.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123652482","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 : 2012-09-13DOI: 10.1109/APCET.2012.6301996
N. Chothani, B. Bhalja, U. Patel
Medium and Low voltage busbar is important equipment in the electrical power system, and its protection demands simple, reliable, economic & sensitive relaying scheme. This paper presents design, implementation and testing of low voltage busbar relaying scheme in laboratory environment using TMS320LF2407A Digital Signal Processor (DSP). Current differential algorithm is designed based on the DSP platform which can reduce large amounts of calculation, expedite the protection's trip and reduces the hardware requirements. Authors have developed a laboratory prototype of the three-phase busbar system containing 3-phase bus, current transformers, line components, fault switches and DSP trainer kit. Experimental results are provided to verify the effectiveness of the proposed scheme. The scheme provides stability against external faults, sensitivity towards high resistance internal faults and better reliability in discriminating in-zone and out of zone faults.
{"title":"A real time DSP based differential protection of Low voltage busbar","authors":"N. Chothani, B. Bhalja, U. Patel","doi":"10.1109/APCET.2012.6301996","DOIUrl":"https://doi.org/10.1109/APCET.2012.6301996","url":null,"abstract":"Medium and Low voltage busbar is important equipment in the electrical power system, and its protection demands simple, reliable, economic & sensitive relaying scheme. This paper presents design, implementation and testing of low voltage busbar relaying scheme in laboratory environment using TMS320LF2407A Digital Signal Processor (DSP). Current differential algorithm is designed based on the DSP platform which can reduce large amounts of calculation, expedite the protection's trip and reduces the hardware requirements. Authors have developed a laboratory prototype of the three-phase busbar system containing 3-phase bus, current transformers, line components, fault switches and DSP trainer kit. Experimental results are provided to verify the effectiveness of the proposed scheme. The scheme provides stability against external faults, sensitivity towards high resistance internal faults and better reliability in discriminating in-zone and out of zone faults.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125244080","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302028
A. Deenadayalan, G. S. Ilango
This paper reports a sensorless control technique for a Brushless DC (BLDC) motor based on an improved sliding mode observer, where a signum function is replaced by sigmoid function. Conventional sliding mode observer use signum function as the switching function which leads to chattering in the estimated back EMF. A low pass filter (LPF) is used to eliminate the chattering problem which indeed produces a phase delay with respect to the actual rotor position. In order to avoid the phase delay, a phase compensator is used to match with the actual rotor position. To overcome the chattering problem without usage of LPF is developed by replacing sigmoid function with signum function. The validity of the improved control strategy has been demonstrated with simulation and real experiments.
{"title":"Position sensorless sliding mode observer with sigmoid function for Brushless DC motor","authors":"A. Deenadayalan, G. S. Ilango","doi":"10.1109/APCET.2012.6302028","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302028","url":null,"abstract":"This paper reports a sensorless control technique for a Brushless DC (BLDC) motor based on an improved sliding mode observer, where a signum function is replaced by sigmoid function. Conventional sliding mode observer use signum function as the switching function which leads to chattering in the estimated back EMF. A low pass filter (LPF) is used to eliminate the chattering problem which indeed produces a phase delay with respect to the actual rotor position. In order to avoid the phase delay, a phase compensator is used to match with the actual rotor position. To overcome the chattering problem without usage of LPF is developed by replacing sigmoid function with signum function. The validity of the improved control strategy has been demonstrated with simulation and real experiments.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123964720","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302055
R. Vijayan, S. Ch, R. Roy
Microgrid is defined as the cluster of multiple distributed generators (DGs) such as renewable energy sources that supply electrical energy. The connection of microgrid is in parallel with the main grid. When microgrid is isolated from remainder of the utility system, it is said to be in intentional islanding mode. In this mode, DG inverter system operates in voltage control mode to provide constant voltage to the local load. During grid connected mode, the Microgrid operates in constant current control mode to supply preset power to the main grid. The main contribution of this paper is summarized as 1) Design of a network based control scheme for inverter based sources, which provides proper current control during grid connected mode and voltage control during islanding mode. 2) Development of an algorithm for intentional islanding detection and synchronization controller required during grid reconnection. 3) Dynamic modeling and simulation are conducted to show system behavior under proposed method using SIMULINK. From the simulation results using Simulink dynamic models, it can be shown that these controllers provide the microgrid with a deterministic and reliable connection to the grid.
{"title":"Dynamic modeling of microgrid for grid connected and intentional islanding operation","authors":"R. Vijayan, S. Ch, R. Roy","doi":"10.1109/APCET.2012.6302055","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302055","url":null,"abstract":"Microgrid is defined as the cluster of multiple distributed generators (DGs) such as renewable energy sources that supply electrical energy. The connection of microgrid is in parallel with the main grid. When microgrid is isolated from remainder of the utility system, it is said to be in intentional islanding mode. In this mode, DG inverter system operates in voltage control mode to provide constant voltage to the local load. During grid connected mode, the Microgrid operates in constant current control mode to supply preset power to the main grid. The main contribution of this paper is summarized as 1) Design of a network based control scheme for inverter based sources, which provides proper current control during grid connected mode and voltage control during islanding mode. 2) Development of an algorithm for intentional islanding detection and synchronization controller required during grid reconnection. 3) Dynamic modeling and simulation are conducted to show system behavior under proposed method using SIMULINK. From the simulation results using Simulink dynamic models, it can be shown that these controllers provide the microgrid with a deterministic and reliable connection to the grid.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127833995","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302076
U. Fragomeni
Power economic dispatch is a problem whose effective solution would be very helpful in saving money for power market operators. A direct solution to the Multi-Area Economic Dispatch problem is proposed. The method is suitable for radial interconnections of every size and complexity. The core of the procedure is in the direct graphical solution of Kuhn-Tucker conditions. A detailed explanation of the procedure and a comparison with other results from literature are provided. The method returns excellent results in terms of cost minimization.
{"title":"Direct method to multi-area economic dispatch","authors":"U. Fragomeni","doi":"10.1109/APCET.2012.6302076","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302076","url":null,"abstract":"Power economic dispatch is a problem whose effective solution would be very helpful in saving money for power market operators. A direct solution to the Multi-Area Economic Dispatch problem is proposed. The method is suitable for radial interconnections of every size and complexity. The core of the procedure is in the direct graphical solution of Kuhn-Tucker conditions. A detailed explanation of the procedure and a comparison with other results from literature are provided. The method returns excellent results in terms of cost minimization.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131176594","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302042
Y. Singh, M. Bhatotia, R. Mitra
Inverted pendulum system is a nonlinear multivariable system which is inherently unstable. It requires designing of a hybrid controller which can adapt in different disturbance conditions and work appreciably well when compared to conventional controllers. In this paper, a hybrid controller for inverted pendulum is designed. Initially Fuzzy and LQR controllers for inverted pendulum are designed, then data are collected from these controllers, which then are used to train Adaptive neuro-fuzzy inference system (ANFIS). This hybrid controller has advantages of Fuzzy, LQR controllers and of neural networks; so it gives better performance.
{"title":"Hybrid controller for inverted pendulum","authors":"Y. Singh, M. Bhatotia, R. Mitra","doi":"10.1109/APCET.2012.6302042","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302042","url":null,"abstract":"Inverted pendulum system is a nonlinear multivariable system which is inherently unstable. It requires designing of a hybrid controller which can adapt in different disturbance conditions and work appreciably well when compared to conventional controllers. In this paper, a hybrid controller for inverted pendulum is designed. Initially Fuzzy and LQR controllers for inverted pendulum are designed, then data are collected from these controllers, which then are used to train Adaptive neuro-fuzzy inference system (ANFIS). This hybrid controller has advantages of Fuzzy, LQR controllers and of neural networks; so it gives better performance.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"60 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114047544","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302026
H. Ghosh, Pradip Kumar Saha, Goutam Kumar Panda
A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or a mis-operation of end user Equipment's. Utility distribution networks, sensitive industrial loads, and critical commercial operations all suffer from various types of outages and service interruptions which can cost significant financial 1oss per incident based on process down-time, lost production, idle work forces, and other factors. With the restructuring of Power Systems and with shifting trend towards distributed and dispersed generation, the issue of Power Quality is going to take newer dimensions. To solve this problem, power electronics controller based custom power devices are used. Among these, the Distribution Static Compensator (DSTATCOM) and the Dynamic Voltage Restorer (DVR) are most effective devices, both of them based on the VSI principle. A DVR injects a voltage in series with the system voltage and a D-STATCOM injects a current into the system to correct the power quality problems. Comprehensive results are presented to assess the performance of each device as a potential custom power solution. Simulation results carried out by MATLAB with its Simulink and Sim Power System (SPS) toolboxes to verify the performance of the proposed method.
电能质量问题是一种表现为电压、电流或频率不标准，导致终端用户设备故障或误操作的情况。公用事业分配网络、敏感的工业负荷和关键的商业运作都受到各种类型的中断和服务中断的影响，这可能会造成重大的经济损失，这些损失是基于过程停机、生产损失、闲置劳动力和其他因素。随着电力系统的结构调整和分布式、分散发电的发展趋势，电能质量问题将呈现出新的面貌。为了解决这个问题，使用了基于定制功率器件的电力电子控制器。其中，基于VSI原理的分布式静态补偿器(DSTATCOM)和动态电压恢复器(DVR)是最有效的器件。DVR与系统电压串联注入电压，D-STATCOM向系统注入电流以纠正电能质量问题。综合结果提出，以评估每个器件的性能作为一个潜在的定制电源解决方案。利用MATLAB的Simulink和Sim Power System (SPS)工具箱进行仿真，验证了所提方法的性能。
{"title":"Performance comparison between DVR and DSTATCOM used for load voltage control in distribution side","authors":"H. Ghosh, Pradip Kumar Saha, Goutam Kumar Panda","doi":"10.1109/APCET.2012.6302026","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302026","url":null,"abstract":"A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or a mis-operation of end user Equipment's. Utility distribution networks, sensitive industrial loads, and critical commercial operations all suffer from various types of outages and service interruptions which can cost significant financial 1oss per incident based on process down-time, lost production, idle work forces, and other factors. With the restructuring of Power Systems and with shifting trend towards distributed and dispersed generation, the issue of Power Quality is going to take newer dimensions. To solve this problem, power electronics controller based custom power devices are used. Among these, the Distribution Static Compensator (DSTATCOM) and the Dynamic Voltage Restorer (DVR) are most effective devices, both of them based on the VSI principle. A DVR injects a voltage in series with the system voltage and a D-STATCOM injects a current into the system to correct the power quality problems. Comprehensive results are presented to assess the performance of each device as a potential custom power solution. Simulation results carried out by MATLAB with its Simulink and Sim Power System (SPS) toolboxes to verify the performance of the proposed method.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127488837","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302015
G. Madhav, Y. Obulesh
This paper proposes a control strategy of generating a rotor flux amplitude reference for Doubly Fed Induction Machine (DFIM) based wind turbines. In addition to that a Direct Torque Control (DTC) strategy that provides fast dynamic response accompanies the overall control of the wind turbine. It is specially designed to address perturbations, such as voltage dips, keeping controlled the torque of the wind turbine, considerably reducing the stator and rotor over currents during faults. Despite the fact that the proposed control does not totally eliminate the necessity of the typical crowbar protection for this kind of turbines, it eliminates the activation of this protection during low depth voltage dips.
{"title":"DTC control strategy for Doubly Fed Induction Machine under low voltage dips","authors":"G. Madhav, Y. Obulesh","doi":"10.1109/APCET.2012.6302015","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302015","url":null,"abstract":"This paper proposes a control strategy of generating a rotor flux amplitude reference for Doubly Fed Induction Machine (DFIM) based wind turbines. In addition to that a Direct Torque Control (DTC) strategy that provides fast dynamic response accompanies the overall control of the wind turbine. It is specially designed to address perturbations, such as voltage dips, keeping controlled the torque of the wind turbine, considerably reducing the stator and rotor over currents during faults. Despite the fact that the proposed control does not totally eliminate the necessity of the typical crowbar protection for this kind of turbines, it eliminates the activation of this protection during low depth voltage dips.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128078012","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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