Pub Date : 2014-09-01DOI: 10.1109/ISEG.2014.7005577
K. C. Deekshit Kompella, M. V. Gopala Rao, R. S. Rao, R. N. Sreenivasu
This paper presents the current based monitoring of induction motor for identification of bearing faults. Sensor less monitoring has many advantages over conventional vibration monitoring. The method however does not give good performance due to variable load and speed of induction motor. Due to non stationary nature of stator current, Fourier transform problems may occur. Therefore, this work presents the motor current signature analysis using wavelet analysis and compares with the FFT analysis. The proposed method has been applied to detect the bearing faults in 3 phase induction motor. It is difficult to extract the bearing fault component from stator current spectrum especially at incipient stage. Therefore, here the bearing fault can be identified by cancelling nonbearing fault component from stator current signature. The results have affirmed the effectiveness of the method.
{"title":"Estimation of bearing faults in induction motor by MCSA using Daubechies wavelet analysis","authors":"K. C. Deekshit Kompella, M. V. Gopala Rao, R. S. Rao, R. N. Sreenivasu","doi":"10.1109/ISEG.2014.7005577","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005577","url":null,"abstract":"This paper presents the current based monitoring of induction motor for identification of bearing faults. Sensor less monitoring has many advantages over conventional vibration monitoring. The method however does not give good performance due to variable load and speed of induction motor. Due to non stationary nature of stator current, Fourier transform problems may occur. Therefore, this work presents the motor current signature analysis using wavelet analysis and compares with the FFT analysis. The proposed method has been applied to detect the bearing faults in 3 phase induction motor. It is difficult to extract the bearing fault component from stator current spectrum especially at incipient stage. Therefore, here the bearing fault can be identified by cancelling nonbearing fault component from stator current signature. The results have affirmed the effectiveness of the method.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124996015","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005612
A. Babu, C. Suresh, S. Sivanagaraju, M. Mohana Rao
This paper presents a novel concept to solve optimal power flow (OPF) problem in the presence of series flexible alternating current transmission systems (FACTS) controller which is thyristor controlled series capacitor (TCSC). In the proposed algorithm, a two stage initialization process have been adopted and also it gives optimal solution with less number of generations which results in the reduction of the computation time. Numerical results are carried out on IEEE 30-bus system to demonstrate the effectiveness of the proposed algorithm for different objective functions with TCSC. The OPF results of proposed algorithm is compared with existing algorithm. The results reveal better solution and computational efficiency of the proposed algorithm.
{"title":"A two stage initialization based particle swarm optimization algorithm for optimal power flow solution with TCSC","authors":"A. Babu, C. Suresh, S. Sivanagaraju, M. Mohana Rao","doi":"10.1109/ISEG.2014.7005612","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005612","url":null,"abstract":"This paper presents a novel concept to solve optimal power flow (OPF) problem in the presence of series flexible alternating current transmission systems (FACTS) controller which is thyristor controlled series capacitor (TCSC). In the proposed algorithm, a two stage initialization process have been adopted and also it gives optimal solution with less number of generations which results in the reduction of the computation time. Numerical results are carried out on IEEE 30-bus system to demonstrate the effectiveness of the proposed algorithm for different objective functions with TCSC. The OPF results of proposed algorithm is compared with existing algorithm. The results reveal better solution and computational efficiency of the proposed algorithm.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126326747","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005596
R. V. S. Satyanarayana Rao, S. Reddy
Environmental, regulatory and economic constraints have restricted the growth of electric power transmission facilities, and the topologies to enlarge the levels of power transmission and enhance stability through existing transmission lines have become greatly needed. Many approaches have been proposed for solving the stability problems found in power system operations. Considering the diversity of both, the solutions and the problems, it is often difficult to identify the most suitable solution. The main purpose of this paper is to demonstrate the capability of Inter Phase Power Flow (IPC) Controller as a means for power flow improvement in power systems. In this paper fourteen bus system is used as a test bed. The results are shown with and without TC-IPC. The results indicate the robustness of this Flexible AC Transmission System (FACTS) controller applied to the fourteen bus system.
{"title":"Modelling and simulation of 14 bus system with TC-IPC","authors":"R. V. S. Satyanarayana Rao, S. Reddy","doi":"10.1109/ISEG.2014.7005596","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005596","url":null,"abstract":"Environmental, regulatory and economic constraints have restricted the growth of electric power transmission facilities, and the topologies to enlarge the levels of power transmission and enhance stability through existing transmission lines have become greatly needed. Many approaches have been proposed for solving the stability problems found in power system operations. Considering the diversity of both, the solutions and the problems, it is often difficult to identify the most suitable solution. The main purpose of this paper is to demonstrate the capability of Inter Phase Power Flow (IPC) Controller as a means for power flow improvement in power systems. In this paper fourteen bus system is used as a test bed. The results are shown with and without TC-IPC. The results indicate the robustness of this Flexible AC Transmission System (FACTS) controller applied to the fourteen bus system.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114699392","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005392
V. Rao, R. S. Rao
The Flexible AC Transmission System (FACTS) controllers play a vital role in the power system security enhancement. However, due to high capital investment, it is necessary to place these controllers at optimal locations in the power system. This paper presents comparison of various methods used for optimizing the location of Thyristor Controlled Series Compensators (TCSC) and Thyristor Controlled Phase Angle Regulators (TCPAR) which are FACTS devices. A sensitivity based approach has been used to decide optimal location of TCSC & TCPAR. Three indices obtained in this work are, line loss sensitivity indices, total system loss sensitivity indices, real power flow performance index. All the three techniques have been implemented on 5 bus system and IEEE-14 bus system.
{"title":"Comparison of various methods for optimal placement of FACTS devices","authors":"V. Rao, R. S. Rao","doi":"10.1109/ISEG.2014.7005392","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005392","url":null,"abstract":"The Flexible AC Transmission System (FACTS) controllers play a vital role in the power system security enhancement. However, due to high capital investment, it is necessary to place these controllers at optimal locations in the power system. This paper presents comparison of various methods used for optimizing the location of Thyristor Controlled Series Compensators (TCSC) and Thyristor Controlled Phase Angle Regulators (TCPAR) which are FACTS devices. A sensitivity based approach has been used to decide optimal location of TCSC & TCPAR. Three indices obtained in this work are, line loss sensitivity indices, total system loss sensitivity indices, real power flow performance index. All the three techniques have been implemented on 5 bus system and IEEE-14 bus system.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123555746","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005622
Maddala Teja Kiran Kumar, G. Murthy
Switched reluctance motor (SRM) had gained attention now a day because it has vantages like simple construction, low cost, high fault tolerance. This motor can be used at high speed in low voltage and at variable speed applications. In this motor the losses are less and the efficiency is more because there are no windings on the rotor. In this paper the low-cost and the low-voltage dual decay converter topologies are discussed for the 8/6 switched reluctance motor. Also a closed loop control is proposed for each converter topology. Finally the simulation results in MATLAB/SIMULINK are presented. Constant speed is obtained in closed loop control.
{"title":"Performance of 8/6 switched reluctance motor in open loop and closed loop control with various converter topologies","authors":"Maddala Teja Kiran Kumar, G. Murthy","doi":"10.1109/ISEG.2014.7005622","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005622","url":null,"abstract":"Switched reluctance motor (SRM) had gained attention now a day because it has vantages like simple construction, low cost, high fault tolerance. This motor can be used at high speed in low voltage and at variable speed applications. In this motor the losses are less and the efficiency is more because there are no windings on the rotor. In this paper the low-cost and the low-voltage dual decay converter topologies are discussed for the 8/6 switched reluctance motor. Also a closed loop control is proposed for each converter topology. Finally the simulation results in MATLAB/SIMULINK are presented. Constant speed is obtained in closed loop control.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121734673","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005602
Susmita Kar, S. Samantaray
A multiple features based passive islanding detection technique using S-transform and decision tree is proposed in this paper. It consider synchronous as well as inverter based distributed generations interfaced to micro-grid. The technique involves extraction of different statistical features of frequency contour obtain by performing S-transform with the current signal retrieved at target distributed generation location and builds the decision tree for islanding and non-islanding classification. Extensive simulations are carried out for wide variations in system loading and power mis-match during islanding, and a decision tree is built for effective islanding detection for both synchronous and inverter based distributed generations in microgrid. Performance of the proposed anti-islanding technique is compared with existing rate of change of frequency and rate of change of voltage relay. It provides improved performance at lower end power mis-match.
{"title":"Multiple features based anti-islanding protection relay for distributed generations","authors":"Susmita Kar, S. Samantaray","doi":"10.1109/ISEG.2014.7005602","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005602","url":null,"abstract":"A multiple features based passive islanding detection technique using S-transform and decision tree is proposed in this paper. It consider synchronous as well as inverter based distributed generations interfaced to micro-grid. The technique involves extraction of different statistical features of frequency contour obtain by performing S-transform with the current signal retrieved at target distributed generation location and builds the decision tree for islanding and non-islanding classification. Extensive simulations are carried out for wide variations in system loading and power mis-match during islanding, and a decision tree is built for effective islanding detection for both synchronous and inverter based distributed generations in microgrid. Performance of the proposed anti-islanding technique is compared with existing rate of change of frequency and rate of change of voltage relay. It provides improved performance at lower end power mis-match.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126473411","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005606
N. Paliwal, R. Rai
This paper describes connected mode and Islanding mode of distribution subsystem and formation of a micro-grid. In this micro-grid is composed of a two distributed generations (DG). One is a diesel-generator and second is two parallel connected inverter interfaced voltage source with voltage regulator. The two parallel connected inverter with voltage regulator is independent of real and reactive power control to minimize islanding transients and maintain voltage stability and angle stability. The simulation of study system is performed with the help of MATLAB/SIMULINK software tool. This paper concludes that presence of an electronically-interfaced distributed energy resource unit makes the concept of micro-grid a technically viable option.
{"title":"Micro-grid operation during grid connected and Islanding mode using conventional and inverter interfaced source","authors":"N. Paliwal, R. Rai","doi":"10.1109/ISEG.2014.7005606","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005606","url":null,"abstract":"This paper describes connected mode and Islanding mode of distribution subsystem and formation of a micro-grid. In this micro-grid is composed of a two distributed generations (DG). One is a diesel-generator and second is two parallel connected inverter interfaced voltage source with voltage regulator. The two parallel connected inverter with voltage regulator is independent of real and reactive power control to minimize islanding transients and maintain voltage stability and angle stability. The simulation of study system is performed with the help of MATLAB/SIMULINK software tool. This paper concludes that presence of an electronically-interfaced distributed energy resource unit makes the concept of micro-grid a technically viable option.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117021535","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005578
A. Choudhary
Statcom behaviour under unbalanced power system condition is examined. State observer based control strategy is used to estimate the voltages at the point of common coupling from the measured injected current so that hardware requirement gets reduced and hence cost gets reduced. Feedback linearization control strategy has been used to linearize the system and to decouple the positive and negative sequence component of ac side current to evade the possibility of over current to statcom under unbalanced power system condition. The instantaneous active and reactive power theory is used for calculating the positive sequence component of current in α-β reference frame with the help of desired active and reactive power reference. The sinusoidal pulse width modulation control technique has been implemented for voltage source inverter to produce the gating pulses. Two level statcom is used for realization the above mentioned control scheme.
{"title":"Estimation of AC voltages under unbalanced condition using state observer control","authors":"A. Choudhary","doi":"10.1109/ISEG.2014.7005578","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005578","url":null,"abstract":"Statcom behaviour under unbalanced power system condition is examined. State observer based control strategy is used to estimate the voltages at the point of common coupling from the measured injected current so that hardware requirement gets reduced and hence cost gets reduced. Feedback linearization control strategy has been used to linearize the system and to decouple the positive and negative sequence component of ac side current to evade the possibility of over current to statcom under unbalanced power system condition. The instantaneous active and reactive power theory is used for calculating the positive sequence component of current in α-β reference frame with the help of desired active and reactive power reference. The sinusoidal pulse width modulation control technique has been implemented for voltage source inverter to produce the gating pulses. Two level statcom is used for realization the above mentioned control scheme.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127713674","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005603
G. Sekhar, P. Subramanyam
In this paper the authors have developed a protection scheme using Logic Based Detection of negative sequence currents and for Six Phase Transmission system of Allegheny Power System(APS), USA located between McCalmont bus and Springdale bus. A Six Phase System can be considered as two mutually coupled Three Phase Systems having mutual coupling only for Zero Sequence components when Dual Three Phase Transformation is used for analyzing the Six Phase System. A Novel method for the development of Logic Based Detection of negative sequence currents have been presented for use in Six Phase Systems using Matlab Simulink tool. The proposed Protection Scheme is simulated for shunt faults of both symmetrical and Unsymmetrical occurring at McCalmont bus of APS. The fault currents and Bus voltages had been taken from earlier studies of fault analysis of Six Phase Transmission line of Allegheny Power System. The scheme is simulated to trip the faulty group and is also extended to trip only the faulty section.
{"title":"Protection of Six Phase Transmission system of Allegheny Power System, USA against shunt faults","authors":"G. Sekhar, P. Subramanyam","doi":"10.1109/ISEG.2014.7005603","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005603","url":null,"abstract":"In this paper the authors have developed a protection scheme using Logic Based Detection of negative sequence currents and for Six Phase Transmission system of Allegheny Power System(APS), USA located between McCalmont bus and Springdale bus. A Six Phase System can be considered as two mutually coupled Three Phase Systems having mutual coupling only for Zero Sequence components when Dual Three Phase Transformation is used for analyzing the Six Phase System. A Novel method for the development of Logic Based Detection of negative sequence currents have been presented for use in Six Phase Systems using Matlab Simulink tool. The proposed Protection Scheme is simulated for shunt faults of both symmetrical and Unsymmetrical occurring at McCalmont bus of APS. The fault currents and Bus voltages had been taken from earlier studies of fault analysis of Six Phase Transmission line of Allegheny Power System. The scheme is simulated to trip the faulty group and is also extended to trip only the faulty section.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126398036","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 : 2014-09-01DOI: 10.1109/ISEG.2014.7005595
T. Kumar, M. Rao
The wind power generation, utilization and its integration with electrical grid are increasing worldwide. The generated wind power is always changing due to its time varying nature and producing stability problem. The power quality improvement is essential with the newer generation load equipment's, their performance is very sensitive to power quality disturbances especially with voltage sag, Harmonics and voltage recovery after fault. The power electronics based power conditioning devices makes an approach to reduce the power quality problems in the system. The STATCOM is one of the methodologies to compensate the reactive power needed for the system. This paper presents a new coordinated voltage control scheme using ANFIS based STATCOM and ULTC transformer along with a three phase harmonic filter to mitigate the harmonics in the system. Different types of faults applied on the system to analyses the performance of proposed filter. The system of ANFIS based STATCOM with three phase harmonic filter is modeled using MATLAB/SIMULINK.
{"title":"Mitigation of Harmonics and power quality enhancement for SEIG based wind farm using ANFIS based STATCOM","authors":"T. Kumar, M. Rao","doi":"10.1109/ISEG.2014.7005595","DOIUrl":"https://doi.org/10.1109/ISEG.2014.7005595","url":null,"abstract":"The wind power generation, utilization and its integration with electrical grid are increasing worldwide. The generated wind power is always changing due to its time varying nature and producing stability problem. The power quality improvement is essential with the newer generation load equipment's, their performance is very sensitive to power quality disturbances especially with voltage sag, Harmonics and voltage recovery after fault. The power electronics based power conditioning devices makes an approach to reduce the power quality problems in the system. The STATCOM is one of the methodologies to compensate the reactive power needed for the system. This paper presents a new coordinated voltage control scheme using ANFIS based STATCOM and ULTC transformer along with a three phase harmonic filter to mitigate the harmonics in the system. Different types of faults applied on the system to analyses the performance of proposed filter. The system of ANFIS based STATCOM with three phase harmonic filter is modeled using MATLAB/SIMULINK.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133934401","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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