Pub Date : 2009-03-18DOI: 10.1109/POWERENG.2009.4915157
A. El-Gammal, A. A. El-Samahy
This paper presents the application of a new Particle swarm optimization technique for adjusting the gains of a PID speed controller adaptively to give the minimum integral absolute error between the speed demand and the output response, minimum settling time, and minimum overshoot for a separately excited dc drive. The new technique converts all objective functions to a single objective function by deriving a single aggregate objective function using specified or selected weighting factors. Since the optimal PID controller parameters are dependent on the selected weighting factors, the weighting factors was also treated as dynamic optimizing parameters within the Particle Swarm Optimization as a dual optimization and global selection of PID controller optimal parameters as well as best set of weighting factors. Computer simulations and experimental results show that the performance of the optimal PID controller is better than that of the traditional PID controller.
{"title":"A modified design of PID controller for DC motor drives using Particle Swarm Optimization PSO","authors":"A. El-Gammal, A. A. El-Samahy","doi":"10.1109/POWERENG.2009.4915157","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915157","url":null,"abstract":"This paper presents the application of a new Particle swarm optimization technique for adjusting the gains of a PID speed controller adaptively to give the minimum integral absolute error between the speed demand and the output response, minimum settling time, and minimum overshoot for a separately excited dc drive. The new technique converts all objective functions to a single objective function by deriving a single aggregate objective function using specified or selected weighting factors. Since the optimal PID controller parameters are dependent on the selected weighting factors, the weighting factors was also treated as dynamic optimizing parameters within the Particle Swarm Optimization as a dual optimization and global selection of PID controller optimal parameters as well as best set of weighting factors. Computer simulations and experimental results show that the performance of the optimal PID controller is better than that of the traditional PID controller.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134420353","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915213
Srivats Shukla, D. N. Vishwakarma
Advent of “System on Chip” technology has redefined the consumer electronics industry. The main advantage of such SoC based systems is cost and space effectiveness. Such systems are available for very cheap cost, which can be further used for some practical purposes with little effort, hence very practical solution for the applications such as protective relays. In this paper a “Universal” Motor Protection relay is proposed utilizing Soc based design approach. Furthermore, a digital low-pass FIR filter has also been implemented on the same chip, which overcomes the requirement of external filtering. The Xilinx-Spartan FPGA is used to implement the relay which takes three phase currents as input and provides a number of protections for the motor like over-current, under-frequency, over-frequency, thermal protection and negative phase sequence, etc. It has been shown that not only the hardware requirement is optimized but also the response time is improved with respect to the existing prototypes.
{"title":"Development of a novel single chip solution for a motor protection relay","authors":"Srivats Shukla, D. N. Vishwakarma","doi":"10.1109/POWERENG.2009.4915213","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915213","url":null,"abstract":"Advent of “System on Chip” technology has redefined the consumer electronics industry. The main advantage of such SoC based systems is cost and space effectiveness. Such systems are available for very cheap cost, which can be further used for some practical purposes with little effort, hence very practical solution for the applications such as protective relays. In this paper a “Universal” Motor Protection relay is proposed utilizing Soc based design approach. Furthermore, a digital low-pass FIR filter has also been implemented on the same chip, which overcomes the requirement of external filtering. The Xilinx-Spartan FPGA is used to implement the relay which takes three phase currents as input and provides a number of protections for the motor like over-current, under-frequency, over-frequency, thermal protection and negative phase sequence, etc. It has been shown that not only the hardware requirement is optimized but also the response time is improved with respect to the existing prototypes.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131008822","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915176
I. Roasto, D. Vinnikov, V. Vodovozov
The present paper analyzes different three-level neutral point clamped half-bridge DC/DC converter control schemes. Problems encountered and features are explained and simulated and the most optimal solution for the high input voltage (≥2 kV) and output power (≥20 kW) applications is proposed.
{"title":"Simulation and evaluation of control methods for the rolling stock static auxiliary converter based on three-level NPC inverter topology","authors":"I. Roasto, D. Vinnikov, V. Vodovozov","doi":"10.1109/POWERENG.2009.4915176","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915176","url":null,"abstract":"The present paper analyzes different three-level neutral point clamped half-bridge DC/DC converter control schemes. Problems encountered and features are explained and simulated and the most optimal solution for the high input voltage (≥2 kV) and output power (≥20 kW) applications is proposed.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132553101","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915197
A. Mozdawar, Bahman Khaki, M. H. Asgari, R. Riahi
The strategic bidding problem for generation companies (GENCOs) in a pay as bid market is considered with respect to risk analysis for different participant types, in which GENCOs suffer of lack of complete information about opponents bidding strategies. According to Iran power market characteristics, in which participants should declare their maximum available energy to the ISO, Bertrand model is adopted for strategic bidding in the power market. Then, by transforming incomplete data that each GENCO has from others, into complete information using Bayesian Nash equilibrium, a proper method are proposed considering the power market characteristics, for maximization of GENCOs' profit according to the other GENCOs' bidding behaviors and power system operating conditions. Because of uncertainty of sources in a power system such as strategic behavior of opponent GENCOs, demand fluctuations and forced outage of network components, calculation of equilibrium point is not enough in proper strategic bidding, so the problem utilized so that risk factor is taken into account. The method is tested on a partial system, including five GENCOs, and the numerical results showed in detail the efficiency of the modeling and the proposed method of bidding behavior for generation companies.
{"title":"Game based strategic bidding in pay as bid markets considering incomplete information and risk factor","authors":"A. Mozdawar, Bahman Khaki, M. H. Asgari, R. Riahi","doi":"10.1109/POWERENG.2009.4915197","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915197","url":null,"abstract":"The strategic bidding problem for generation companies (GENCOs) in a pay as bid market is considered with respect to risk analysis for different participant types, in which GENCOs suffer of lack of complete information about opponents bidding strategies. According to Iran power market characteristics, in which participants should declare their maximum available energy to the ISO, Bertrand model is adopted for strategic bidding in the power market. Then, by transforming incomplete data that each GENCO has from others, into complete information using Bayesian Nash equilibrium, a proper method are proposed considering the power market characteristics, for maximization of GENCOs' profit according to the other GENCOs' bidding behaviors and power system operating conditions. Because of uncertainty of sources in a power system such as strategic behavior of opponent GENCOs, demand fluctuations and forced outage of network components, calculation of equilibrium point is not enough in proper strategic bidding, so the problem utilized so that risk factor is taken into account. The method is tested on a partial system, including five GENCOs, and the numerical results showed in detail the efficiency of the modeling and the proposed method of bidding behavior for generation companies.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"8 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114052331","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915159
J. Škare, T. Tomisa, M. Mesić
The calculation of short-circuit currents in DC auxiliary systems of power plants and substations is essential for design and application of distribution and protective devices used in these systems. Because of differences between DC and AC auxiliary systems, DC system protection designers should be take into account that important fact in calculation and dimensioning of DC auxiliary system. There are several mathematical models that are usually used for calculation of short-circuit currents in DC auxiliary system. In this paper, the authors performed short-circuit currents calculation for one real DC auxiliary system of power plant using three different, well-known, mathematical models. The results of calculations were compared with results given by testing of selectivity of DC auxiliary system on the site. Based on comparison results of different calculations and testing on the site conclusion related to choice one of three the most often used mathematical models as the most suitable has deduced.
{"title":"Dynamics analysis of 220 V DC auxiliary system in power plant using different mathematical models","authors":"J. Škare, T. Tomisa, M. Mesić","doi":"10.1109/POWERENG.2009.4915159","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915159","url":null,"abstract":"The calculation of short-circuit currents in DC auxiliary systems of power plants and substations is essential for design and application of distribution and protective devices used in these systems. Because of differences between DC and AC auxiliary systems, DC system protection designers should be take into account that important fact in calculation and dimensioning of DC auxiliary system. There are several mathematical models that are usually used for calculation of short-circuit currents in DC auxiliary system. In this paper, the authors performed short-circuit currents calculation for one real DC auxiliary system of power plant using three different, well-known, mathematical models. The results of calculations were compared with results given by testing of selectivity of DC auxiliary system on the site. Based on comparison results of different calculations and testing on the site conclusion related to choice one of three the most often used mathematical models as the most suitable has deduced.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114460814","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915221
D. L. Faria, R. Castro, C. Philippart, A. Gusmão
Wind power is the fastest growing renewable energy technology and is becoming a significant component of the energy mix. The secure and reliable operation of the power system implies the need for scheduling in advance the energy sources that will produce, so that the power system is balanced. Therefore, the use and importance of the wind power is strictly dependent on the ability to predict the wind in advance. In this paper, ARMA models are used to forecast the wind speed in terms of a medium-term prediction. Furthermore, an investigation on the benefits of pre-filtering the wind speed time series using wavelets is carried out. Some simulations are done with the twofold purpose of evaluating the performance of ARMA models as compared with reference models and investigating whether the wavelet pre-filtering technique leads to an improvement of the forecast results.
{"title":"Wavelets pre-filtering in wind speed prediction","authors":"D. L. Faria, R. Castro, C. Philippart, A. Gusmão","doi":"10.1109/POWERENG.2009.4915221","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915221","url":null,"abstract":"Wind power is the fastest growing renewable energy technology and is becoming a significant component of the energy mix. The secure and reliable operation of the power system implies the need for scheduling in advance the energy sources that will produce, so that the power system is balanced. Therefore, the use and importance of the wind power is strictly dependent on the ability to predict the wind in advance. In this paper, ARMA models are used to forecast the wind speed in terms of a medium-term prediction. Furthermore, an investigation on the benefits of pre-filtering the wind speed time series using wavelets is carried out. Some simulations are done with the twofold purpose of evaluating the performance of ARMA models as compared with reference models and investigating whether the wavelet pre-filtering technique leads to an improvement of the forecast results.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133788264","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915154
J. Orosa, E. J. García-Bustelo, J. A. Perez
This current article shows a procedure to improve wind turbines for kinetic energy conversion in mechanics using a new concentrating design based on moist air phase change. This concentrator presents special interest in the European Atlantic Coast because its weather is mild with a high relative humidity and its winds represent low values for wind turbines applications. Results show a clear possibility of improvement in energy conversion and wind turbine control system.
{"title":"Wind turbine concentrator design based on moist air phase change","authors":"J. Orosa, E. J. García-Bustelo, J. A. Perez","doi":"10.1109/POWERENG.2009.4915154","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915154","url":null,"abstract":"This current article shows a procedure to improve wind turbines for kinetic energy conversion in mechanics using a new concentrating design based on moist air phase change. This concentrator presents special interest in the European Atlantic Coast because its weather is mild with a high relative humidity and its winds represent low values for wind turbines applications. Results show a clear possibility of improvement in energy conversion and wind turbine control system.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134271200","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915261
J. Nzisabira, Yannick Louvigny, P. Duysinx
The main objective of vehicle powertrain hybridization is to simultaneously improve the fuel consumption and environment pollutants impact (Eco-score) without decreasing the vehicle performances and other user satisfaction criteria. Based on a simulation model in ADVISOR, one can evaluate the performances, the emissions and then the Ecoscore and the User Satisfaction for different driving scenarios. To establish a rationale methodology for assessing the eco-efficiency character, we adopt a multidisciplinary optimization approach while minimizing / maximizing both Eco-score and User satisfaction objective functions. The proposed approach is then used to establish a comparison between HEV (hybrid electric vehicle) and HHV (hybrid hydraulic vehicle) configuration by highlighting the effect of different energy storage systems (batteries, ultra capacitors, hydraulic system), mechanical and electric components sizes upon the optimized HEV design. The selected application is the comparison of different mild parallel hybrid buses. Results show that the hybrid electric buses using ultra capacitors have almost the same performances as those using batteries, while the HHV technology can compete with HEV because of the hydraulic components low cost and recyclability if possibly using of water as motor/pump fluid.
{"title":"Comparison of ultra capacitors, hydraulic accumulators and batteries technologies to optimize hybrid vehicle ecoefficiency","authors":"J. Nzisabira, Yannick Louvigny, P. Duysinx","doi":"10.1109/POWERENG.2009.4915261","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915261","url":null,"abstract":"The main objective of vehicle powertrain hybridization is to simultaneously improve the fuel consumption and environment pollutants impact (Eco-score) without decreasing the vehicle performances and other user satisfaction criteria. Based on a simulation model in ADVISOR, one can evaluate the performances, the emissions and then the Ecoscore and the User Satisfaction for different driving scenarios. To establish a rationale methodology for assessing the eco-efficiency character, we adopt a multidisciplinary optimization approach while minimizing / maximizing both Eco-score and User satisfaction objective functions. The proposed approach is then used to establish a comparison between HEV (hybrid electric vehicle) and HHV (hybrid hydraulic vehicle) configuration by highlighting the effect of different energy storage systems (batteries, ultra capacitors, hydraulic system), mechanical and electric components sizes upon the optimized HEV design. The selected application is the comparison of different mild parallel hybrid buses. Results show that the hybrid electric buses using ultra capacitors have almost the same performances as those using batteries, while the HHV technology can compete with HEV because of the hydraulic components low cost and recyclability if possibly using of water as motor/pump fluid.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952523","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915254
S. Mariano, J. Pombo, M. Calado, L. Ferreira
This paper addresses the stabilization and performance of the load frequency regulator. The problem is solved by using the theory of the optimal control. An algorithm, based on the new technique, proposed by the authors, to overcome the difficulties of specifying the weighting matrices Q and R, is presented. The algorithm here proposed considers the multi-area electric energy system. The paper presents illustrative numerical simulation results for this model. The results indicate that the obtained controller exhibits better performance then those based on classic control.
{"title":"Optimal output control: Load frequency control of a large power system","authors":"S. Mariano, J. Pombo, M. Calado, L. Ferreira","doi":"10.1109/POWERENG.2009.4915254","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915254","url":null,"abstract":"This paper addresses the stabilization and performance of the load frequency regulator. The problem is solved by using the theory of the optimal control. An algorithm, based on the new technique, proposed by the authors, to overcome the difficulties of specifying the weighting matrices Q and R, is presented. The algorithm here proposed considers the multi-area electric energy system. The paper presents illustrative numerical simulation results for this model. The results indicate that the obtained controller exhibits better performance then those based on classic control.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124930235","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915137
L. Franquelo, J. I. Leon, E. Dominguez
This paper reviews briefly the current scenarios where power electronics converters are being applied. In the paper, the main focus moves towards the high power applications, reviewing the different alternatives and topologies. The multilevel approach is studied in more depth, showing that is a good solution to the challenges that medium voltage-high power applications pose. Several industry examples are introduced and the most suitable modulation techniques for multilevel high power converters are explained. Among them, the recent selective harmonic mitigation method appears as a good solution to achieve a high performance. Finally the conclusions are addressed.
{"title":"New trends and topologies for high power industrial applications: The multilevel converters solution","authors":"L. Franquelo, J. I. Leon, E. Dominguez","doi":"10.1109/POWERENG.2009.4915137","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915137","url":null,"abstract":"This paper reviews briefly the current scenarios where power electronics converters are being applied. In the paper, the main focus moves towards the high power applications, reviewing the different alternatives and topologies. The multilevel approach is studied in more depth, showing that is a good solution to the challenges that medium voltage-high power applications pose. Several industry examples are introduced and the most suitable modulation techniques for multilevel high power converters are explained. Among them, the recent selective harmonic mitigation method appears as a good solution to achieve a high performance. Finally the conclusions are addressed.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128000238","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：