Pub Date : 2011-12-01DOI: 10.1109/ICPES.2011.6156647
Surendra S. D Thukaram
Effective network overload alleviation is very much essential in order to maintain security and integrity from the operational viewpoint of deregulated power systems. This paper aims at developing a methodology to reschedule the active power generation from the sources in order to manage the network congestion under normal/contingency conditions. An effective method has been proposed using fuzzy rule based inference system. Using virtual flows concept, which provides partial contributions/counter flows in the network elements is used as a basis in the proposed method to manage network congestions to the possible extent. The proposed method is illustrated on a sample 6 bus test system and on modified IEEE 39 bus system.
{"title":"Network congestion management by fuzzy inference using virtual flows","authors":"Surendra S. D Thukaram","doi":"10.1109/ICPES.2011.6156647","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156647","url":null,"abstract":"Effective network overload alleviation is very much essential in order to maintain security and integrity from the operational viewpoint of deregulated power systems. This paper aims at developing a methodology to reschedule the active power generation from the sources in order to manage the network congestion under normal/contingency conditions. An effective method has been proposed using fuzzy rule based inference system. Using virtual flows concept, which provides partial contributions/counter flows in the network elements is used as a basis in the proposed method to manage network congestions to the possible extent. The proposed method is illustrated on a sample 6 bus test system and on modified IEEE 39 bus system.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132413722","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156652
R. S. Fernandes, Y. Bichpuriya, M. Rao, S. Soman
Accurate Short Term Load Forecasting (STLF) is critical for efficient functioning of electricity distribution company. High forecast error may result in non-optimal system operations and financial risk in short term power markets. Load profiles on holidays are very different from that on normal days. In India, holidays can be categorized as Sunday, Public holidays (e.g., Independence day, Republic day etc.) and Festival days (e.g., Diwali, Eid, Christmas etc.). Apart from these holidays, there are a few regional holidays e.g., Ganesh Chaturthi and Maharashtra day in the state of Maharashtra. Sunday is a repeated holiday having weekly frequency while other holidays come once in a year. Also, some of these holidays follows lunar calender and some follows Gregorian calender. Each holiday, excluding Sunday and Public holidays, has different characteristics in terms of activities, lighting load and the number of peoples celebrating the holiday. In such a scenario, predicting the accurate load profile for the holidays is a difficult task. This paper proposes two different models for Sunday and other holidays. Sunday model is used for forecasting load profile on Sundays and Holiday model is used for all other public holidays and festival days. The proposed models have been tested on load data of an urban distribution utilities and the results are illustrated.
{"title":"Day ahead load forecasting models for holidays in Indian context","authors":"R. S. Fernandes, Y. Bichpuriya, M. Rao, S. Soman","doi":"10.1109/ICPES.2011.6156652","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156652","url":null,"abstract":"Accurate Short Term Load Forecasting (STLF) is critical for efficient functioning of electricity distribution company. High forecast error may result in non-optimal system operations and financial risk in short term power markets. Load profiles on holidays are very different from that on normal days. In India, holidays can be categorized as Sunday, Public holidays (e.g., Independence day, Republic day etc.) and Festival days (e.g., Diwali, Eid, Christmas etc.). Apart from these holidays, there are a few regional holidays e.g., Ganesh Chaturthi and Maharashtra day in the state of Maharashtra. Sunday is a repeated holiday having weekly frequency while other holidays come once in a year. Also, some of these holidays follows lunar calender and some follows Gregorian calender. Each holiday, excluding Sunday and Public holidays, has different characteristics in terms of activities, lighting load and the number of peoples celebrating the holiday. In such a scenario, predicting the accurate load profile for the holidays is a difficult task. This paper proposes two different models for Sunday and other holidays. Sunday model is used for forecasting load profile on Sundays and Holiday model is used for all other public holidays and festival days. The proposed models have been tested on load data of an urban distribution utilities and the results are illustrated.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129473141","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156661
S. A. S. Hesari, M. Hamzeh, Hadi Toobak
Because of high penetration of distributed resources in the distribution networks, the analysis of islanding detection methods in the multiple inverters situation has become of a great importance. Inverter resident active islanding detection methods inject disturbances into the supply system and detect islanding based on the responses of locally measured parameters. The islanding detection methods which is analyzed in this paper, injects interharmonic into the grid for impedance measurement. This method is very effective in systems with a single inverter but it is believed that their effectiveness might be reduced in multi-inverter systems due to mutual interferences. This paper discusses the effect of inverters on the islanding detection capabilities of inverters with impedance based islanding detection method and also interferences between the latter. The simulations are performed in PSCAD environment, which analyses the capability of impedance based islanding detection methods in a LV distribution network with multiple PV inverter.
{"title":"Performance assessment of an impedance based islanding detection method in a distribution network with multiple PV inverters","authors":"S. A. S. Hesari, M. Hamzeh, Hadi Toobak","doi":"10.1109/ICPES.2011.6156661","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156661","url":null,"abstract":"Because of high penetration of distributed resources in the distribution networks, the analysis of islanding detection methods in the multiple inverters situation has become of a great importance. Inverter resident active islanding detection methods inject disturbances into the supply system and detect islanding based on the responses of locally measured parameters. The islanding detection methods which is analyzed in this paper, injects interharmonic into the grid for impedance measurement. This method is very effective in systems with a single inverter but it is believed that their effectiveness might be reduced in multi-inverter systems due to mutual interferences. This paper discusses the effect of inverters on the islanding detection capabilities of inverters with impedance based islanding detection method and also interferences between the latter. The simulations are performed in PSCAD environment, which analyses the capability of impedance based islanding detection methods in a LV distribution network with multiple PV inverter.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131233053","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156681
K. Munji, R. Bhimasingu
Large-scale utilization of wind energy has caused an increasing concern about its influence on the power quality of the power system. Variable speed wind turbine generators (WTG) with advanced power electronic converters inject harmonic currents in the network, which may potentially cause current and voltage distortions. In this paper a case study is presented to ascertain the distribution of harmonic currents and voltages in a wind farm consisting of 72 wind turbine generators. This analysis is then applied to the study of resonant conditions and harmonic filter design.
{"title":"Mitigation of harmonics in grid integrated wind farms","authors":"K. Munji, R. Bhimasingu","doi":"10.1109/ICPES.2011.6156681","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156681","url":null,"abstract":"Large-scale utilization of wind energy has caused an increasing concern about its influence on the power quality of the power system. Variable speed wind turbine generators (WTG) with advanced power electronic converters inject harmonic currents in the network, which may potentially cause current and voltage distortions. In this paper a case study is presented to ascertain the distribution of harmonic currents and voltages in a wind farm consisting of 72 wind turbine generators. This analysis is then applied to the study of resonant conditions and harmonic filter design.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132215592","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156631
R. Dubey, S. Samantaray, B. Babu, S. N. Kumar
The electric power system maintains a dynamic and delicate balance between generation and load in normal operation condition. A disturbance, such as a sudden change of load, a power system fault, or a trip of a large generation unit, may break the balance, cause the oscillations among the generator rotor angles and force the generators to adjust to a new operating condition. The adjustment will not happen instantaneously due to the inertia of the generator prime movers. The oscillation will cause either stable and/or unstable power swings. During a power swing, the impedance trajectory seen by a distance relay may enter the fault detection zones and cause unwanted relay operation. Distinguishing stable and unstable power swing is one of the challenging tasks. This paper presents a wavelet based energy function for distinguishing stable and unstable power swing using Wavelet based Power Angle criteria.
{"title":"A novel out-of-step detection algorithm using angle of power signal","authors":"R. Dubey, S. Samantaray, B. Babu, S. N. Kumar","doi":"10.1109/ICPES.2011.6156631","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156631","url":null,"abstract":"The electric power system maintains a dynamic and delicate balance between generation and load in normal operation condition. A disturbance, such as a sudden change of load, a power system fault, or a trip of a large generation unit, may break the balance, cause the oscillations among the generator rotor angles and force the generators to adjust to a new operating condition. The adjustment will not happen instantaneously due to the inertia of the generator prime movers. The oscillation will cause either stable and/or unstable power swings. During a power swing, the impedance trajectory seen by a distance relay may enter the fault detection zones and cause unwanted relay operation. Distinguishing stable and unstable power swing is one of the challenging tasks. This paper presents a wavelet based energy function for distinguishing stable and unstable power swing using Wavelet based Power Angle criteria.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123682241","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156618
Subodh Paudel, J. Shrestha, Fernando Buarque de Lima-Neto, Jorge A. F. Ferreira, Muna Adhikari
The rapid depletion of fossil fuel resources and environmental concerns has given awareness on generation of renewable energy resources. Among the various renewable resources, hybrid solar and wind energy seems to be promising solutions to provide reliable power supply with improved system efficiency and reduced storage requirements for stand-alone applications. This paper presents a feasibility assessment and optimum size of photovoltaic (PV) array, wind turbine and battery bank for a standalone hybrid Solar/Wind Power system (HSWPS) at remote telecom station of Nepal at Latitude (27°23′50″) and Longitude (86°44′23″) consisting a telecommunication load of Very Small Aperture Terminal (VSAT), Repeater station and Code Division Multiple Access Base Transceiver Station (CDMA 2C10 BTS). In any RES based system, the feasibility assessment is considered as the first step analysis. In this work, feasibility analysis is carried through hybrid optimization model for electric renewables (HOMER) and mathematical models were implemented in the MATLAB environment to perform the optimal configuration for a given load and a desired loss of power supply probability (LPSP) from a set of systems components with the lowest value of cost function defined in terms of reliability and levelized unit electricity cost (LUCE). The simulation results for the existing and the proposed models are compared. The simulation results shows that existing architecture consisting of 6.12 kW KC85T photovoltaic modules, 1kW H3.1 wind turbine and 1600 Ah GFM-800 battery bank have a 36.6% of unmet load during a year. On the other hand, the proposed system includes 1kW ∗2 H3.1 Wind turbine, 8.05 kW TSM-175DA01 photovoltaic modules and 1125 Ah T-105 battery bank with system reliability of 99.99% with a significant cost reduction as well as reliable energy production.
{"title":"Optimization of hybrid PV/wind power system for remote telecom station","authors":"Subodh Paudel, J. Shrestha, Fernando Buarque de Lima-Neto, Jorge A. F. Ferreira, Muna Adhikari","doi":"10.1109/ICPES.2011.6156618","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156618","url":null,"abstract":"The rapid depletion of fossil fuel resources and environmental concerns has given awareness on generation of renewable energy resources. Among the various renewable resources, hybrid solar and wind energy seems to be promising solutions to provide reliable power supply with improved system efficiency and reduced storage requirements for stand-alone applications. This paper presents a feasibility assessment and optimum size of photovoltaic (PV) array, wind turbine and battery bank for a standalone hybrid Solar/Wind Power system (HSWPS) at remote telecom station of Nepal at Latitude (27°23′50″) and Longitude (86°44′23″) consisting a telecommunication load of Very Small Aperture Terminal (VSAT), Repeater station and Code Division Multiple Access Base Transceiver Station (CDMA 2C10 BTS). In any RES based system, the feasibility assessment is considered as the first step analysis. In this work, feasibility analysis is carried through hybrid optimization model for electric renewables (HOMER) and mathematical models were implemented in the MATLAB environment to perform the optimal configuration for a given load and a desired loss of power supply probability (LPSP) from a set of systems components with the lowest value of cost function defined in terms of reliability and levelized unit electricity cost (LUCE). The simulation results for the existing and the proposed models are compared. The simulation results shows that existing architecture consisting of 6.12 kW KC85T photovoltaic modules, 1kW H3.1 wind turbine and 1600 Ah GFM-800 battery bank have a 36.6% of unmet load during a year. On the other hand, the proposed system includes 1kW ∗2 H3.1 Wind turbine, 8.05 kW TSM-175DA01 photovoltaic modules and 1125 Ah T-105 battery bank with system reliability of 99.99% with a significant cost reduction as well as reliable energy production.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126830909","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156666
Lea J. Puthumana, J. Jaleel
In this paper a detailed study of small hydro power plant, a novel technique to reduce the size of the dump load, auomatic generation control, its simulation and case study of Mankulam small hydro plant etc. is done. Two pipe and Three pipe strategy with proportional-integral controller and on/off controller is proposed here. By using Matlab / SIMULINK, frequency deviation response and dump load response, with step input and chirp input are plotted with different load conditions. The water flowing through the penstock is rerouted in smaller pipes, two or three fitted with motor operated valves. The opening or closing of the valves is achieved by on/off controls. The on/off control linearly raises or lowers the generation. A generalized transfer function model for the system is developed with an on/off control logic. Finally, the transient performance of the system is compared for the two-pipe case (50% dump load) and the three-pipe case (30% dump load). Therefore, the proposed scheme is very effective in automatic generation control of the small-hydro system in addition to reduction in the size of the dump load by 50% and/or 30%, and also, the cost of the controllers including valves is considerably less than the dump load cost, in addition to saving water.
{"title":"Performance evaluation of AGC of SHP with multi-area power system","authors":"Lea J. Puthumana, J. Jaleel","doi":"10.1109/ICPES.2011.6156666","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156666","url":null,"abstract":"In this paper a detailed study of small hydro power plant, a novel technique to reduce the size of the dump load, auomatic generation control, its simulation and case study of Mankulam small hydro plant etc. is done. Two pipe and Three pipe strategy with proportional-integral controller and on/off controller is proposed here. By using Matlab / SIMULINK, frequency deviation response and dump load response, with step input and chirp input are plotted with different load conditions. The water flowing through the penstock is rerouted in smaller pipes, two or three fitted with motor operated valves. The opening or closing of the valves is achieved by on/off controls. The on/off control linearly raises or lowers the generation. A generalized transfer function model for the system is developed with an on/off control logic. Finally, the transient performance of the system is compared for the two-pipe case (50% dump load) and the three-pipe case (30% dump load). Therefore, the proposed scheme is very effective in automatic generation control of the small-hydro system in addition to reduction in the size of the dump load by 50% and/or 30%, and also, the cost of the controllers including valves is considerably less than the dump load cost, in addition to saving water.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114466873","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156657
V. S. Kumar, D. Thukaram
This paper presents methodologies for incorporating phasor measurements into conventional state estimator. The angle measurements obtained from Phasor Measurement Units are handled as angle difference measurements rather than incorporating the angle measurements directly. Handling in such a manner overcomes the problems arising due to the choice of reference bus. Current measurements obtained from Phasor Measurement Units are treated as equivalent pseudo-voltage measurements at the neighboring buses. Two solution approaches namely normal equations approach and linear programming approach are presented to show how the Phasor Measurement Unit measurements can be handled. Comparative evaluation of both the approaches is also presented. Test results on IEEE 14 bus system are presented to validate both the approaches.
{"title":"Linear programming approach for state estimation incorporating phasor measurements","authors":"V. S. Kumar, D. Thukaram","doi":"10.1109/ICPES.2011.6156657","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156657","url":null,"abstract":"This paper presents methodologies for incorporating phasor measurements into conventional state estimator. The angle measurements obtained from Phasor Measurement Units are handled as angle difference measurements rather than incorporating the angle measurements directly. Handling in such a manner overcomes the problems arising due to the choice of reference bus. Current measurements obtained from Phasor Measurement Units are treated as equivalent pseudo-voltage measurements at the neighboring buses. Two solution approaches namely normal equations approach and linear programming approach are presented to show how the Phasor Measurement Unit measurements can be handled. Comparative evaluation of both the approaches is also presented. Test results on IEEE 14 bus system are presented to validate both the approaches.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115003464","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156690
G. S. Punekar, Tesfaye Nafo, N. Kishore
The electric field distribution in Belted Cables and 3-phase gas insulated cables (GIC) enclosed in a common ground enclosure is analyzed and presented in this paper. The electric fields in this type of GIC are analogous to those of 3-phase belted cables. Unlike 3-phase screened cables, the stress distribution in belted cables is not radial. With time varying voltages (power frequency voltage variations; quasi-static voltages) the stress distribution in the cable insulation changes, not being radial. The electric stress distribution is expected to show systematic, revolving effect. This revolving effect is important as the location of maximum stresses keep on shifting. Also, as a secondary effect, the revolving e-field results into electric-field-winds which can add to the particle movements in the gas insulated cables. The literature acknowledges that particle movements in the gas insulated system can have deleterious effect on the over all system insulation strength; which partly get impetus from e-field-winds. The stresses in such a cable are analyzed using open source software Finite Element Method Magnetics (FEMM). The results presented show that the field distribution over a cycle (of 50 Hz) at discrete time intervals are thought to be having a great educational value, giving a feel of electric field variation in (i) belted cables and (ii) GIC with common enclosure. The computed results of electric stress and potential distribution using FEMM are compared with available results based on CSM models to validate the present results where ever possible.
{"title":"On electric fields in belted cables and 3-phase gas insulated cables","authors":"G. S. Punekar, Tesfaye Nafo, N. Kishore","doi":"10.1109/ICPES.2011.6156690","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156690","url":null,"abstract":"The electric field distribution in Belted Cables and 3-phase gas insulated cables (GIC) enclosed in a common ground enclosure is analyzed and presented in this paper. The electric fields in this type of GIC are analogous to those of 3-phase belted cables. Unlike 3-phase screened cables, the stress distribution in belted cables is not radial. With time varying voltages (power frequency voltage variations; quasi-static voltages) the stress distribution in the cable insulation changes, not being radial. The electric stress distribution is expected to show systematic, revolving effect. This revolving effect is important as the location of maximum stresses keep on shifting. Also, as a secondary effect, the revolving e-field results into electric-field-winds which can add to the particle movements in the gas insulated cables. The literature acknowledges that particle movements in the gas insulated system can have deleterious effect on the over all system insulation strength; which partly get impetus from e-field-winds. The stresses in such a cable are analyzed using open source software Finite Element Method Magnetics (FEMM). The results presented show that the field distribution over a cycle (of 50 Hz) at discrete time intervals are thought to be having a great educational value, giving a feel of electric field variation in (i) belted cables and (ii) GIC with common enclosure. The computed results of electric stress and potential distribution using FEMM are compared with available results based on CSM models to validate the present results where ever possible.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130943743","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 : 2011-12-01DOI: 10.1109/ICPES.2011.6156617
S. Sharma, Bhim Singh
This paper deals with a synchronous generator (SG) based variable speed stand-alone wind energy conversion system (WECS). The voltage and frequency controller (VFC) consists of two back-back connected voltage source converter (VSC) and voltage source inverter (VSI) along with a battery energy storage system (BESS) at intermediate DC bus to allow the generation at variable voltage and variable frequency. The load-side VSI is controlled to feed regulated voltage and frequency supply to consumers. The performance of the VFC is obtained under steady-state and dynamic conditions. The simulation results demonstrate that the VFC performs satisfactorily as load leveler, load balancer, a neutral current compensator and as a maximum power point tracker.
{"title":"Variable speed stand-alone wind energy conversion system using synchronous generator","authors":"S. Sharma, Bhim Singh","doi":"10.1109/ICPES.2011.6156617","DOIUrl":"https://doi.org/10.1109/ICPES.2011.6156617","url":null,"abstract":"This paper deals with a synchronous generator (SG) based variable speed stand-alone wind energy conversion system (WECS). The voltage and frequency controller (VFC) consists of two back-back connected voltage source converter (VSC) and voltage source inverter (VSI) along with a battery energy storage system (BESS) at intermediate DC bus to allow the generation at variable voltage and variable frequency. The load-side VSI is controlled to feed regulated voltage and frequency supply to consumers. The performance of the VFC is obtained under steady-state and dynamic conditions. The simulation results demonstrate that the VFC performs satisfactorily as load leveler, load balancer, a neutral current compensator and as a maximum power point tracker.","PeriodicalId":158903,"journal":{"name":"2011 International Conference on Power and Energy Systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116118862","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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