Pub Date : 2009-12-04DOI: 10.1109/SUPERGEN.2009.5348021
Guo Jianbin, Wen Yuanchang, Xiaowei Jian
Aiming at actual condition that the semi-empirical and semi-theoretical researches exist generally in the safety valuation of hydraulic steel gate in service, a new method has been provided, in which the evaluation model is built by BP-neural network, and trained through the normalized corrosion data of hydraulic steel gate. Project applications show that the method evaluated hydraulic steel gate exactly and objectively, and can ensure safety and reliability of gate operation.
{"title":"Safety evaluation research of hydraulic steel gate based on BP-neural network","authors":"Guo Jianbin, Wen Yuanchang, Xiaowei Jian","doi":"10.1109/SUPERGEN.2009.5348021","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348021","url":null,"abstract":"Aiming at actual condition that the semi-empirical and semi-theoretical researches exist generally in the safety valuation of hydraulic steel gate in service, a new method has been provided, in which the evaluation model is built by BP-neural network, and trained through the normalized corrosion data of hydraulic steel gate. Project applications show that the method evaluated hydraulic steel gate exactly and objectively, and can ensure safety and reliability of gate operation.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114647897","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 : 2009-12-04DOI: 10.1109/SUPERGEN.2009.5348225
Qing-Chang Zhong
In this paper, an innovative concept to convert the huge kinetic energy stored in landing aircraft into electricity is identified and presented. An appropriate technical route involving linear machines to implement this concept is proposed. Some challenges and possible applications are discussed. Simulation results on feeding the electricity generated back to the power grid are given.
{"title":"Ground-operated energy recovery system for landing aircraft","authors":"Qing-Chang Zhong","doi":"10.1109/SUPERGEN.2009.5348225","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348225","url":null,"abstract":"In this paper, an innovative concept to convert the huge kinetic energy stored in landing aircraft into electricity is identified and presented. An appropriate technical route involving linear machines to implement this concept is proposed. Some challenges and possible applications are discussed. Simulation results on feeding the electricity generated back to the power grid are given.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116488718","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5347891
Zhiyuan Duan, Chengxue Zhang, Zhijian Hu, Tao Ding
This paper provides an algorithm based on the microhabitat theory and particle swarm for the problem of Wide area controller parameters optimization. The method cans optimal parameters. According to multi-objective model of the problem, and reduce the difficulties and works in design for multi-machine Power System damping Controller. In the end of paper, a typical four-generator two-area testing system indicates that wide-area damping controller has a strong capability of damping area oscillation. The result showed that the algorithm validity and feasibility.
{"title":"Design for multi-machine power system damping controller via particle swarm optimization approach","authors":"Zhiyuan Duan, Chengxue Zhang, Zhijian Hu, Tao Ding","doi":"10.1109/SUPERGEN.2009.5347891","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347891","url":null,"abstract":"This paper provides an algorithm based on the microhabitat theory and particle swarm for the problem of Wide area controller parameters optimization. The method cans optimal parameters. According to multi-objective model of the problem, and reduce the difficulties and works in design for multi-machine Power System damping Controller. In the end of paper, a typical four-generator two-area testing system indicates that wide-area damping controller has a strong capability of damping area oscillation. The result showed that the algorithm validity and feasibility.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114995300","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5347908
Xu Yuqin, Zhang Li, Wang Zeng-ping
In terms of the distribution system with distributed generators (DGs) especially considering the operation of micro-grids (MGs) composed of DGs and loads, an AER (Agent-Environment-Rules) Constraint Satisfaction Problem (CSP) based model to solve the serve restoration problem in the event of a large-scale blackout in a power distribution network with DGs is proposed. All agents live in a lattice-like environment using multi-agent system, and they can not only sense their local environment but also move in it. The operation method of DGs in the process of service restoration for large area blackout of distribution system with DGs is researched for making use of the capacity of DGs sufficiently and reducing the blackout area. The asynchronous backtracking algorithm is used to solve the AER model based on CSP, the values of the agents can be exchanged, and they also can be updated by the influence between the agents and the environment. Finally, the example results indicate the feasibility of the proposed method.
{"title":"Research on service restoration for large area blackout of distribution system with distributed generators","authors":"Xu Yuqin, Zhang Li, Wang Zeng-ping","doi":"10.1109/SUPERGEN.2009.5347908","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347908","url":null,"abstract":"In terms of the distribution system with distributed generators (DGs) especially considering the operation of micro-grids (MGs) composed of DGs and loads, an AER (Agent-Environment-Rules) Constraint Satisfaction Problem (CSP) based model to solve the serve restoration problem in the event of a large-scale blackout in a power distribution network with DGs is proposed. All agents live in a lattice-like environment using multi-agent system, and they can not only sense their local environment but also move in it. The operation method of DGs in the process of service restoration for large area blackout of distribution system with DGs is researched for making use of the capacity of DGs sufficiently and reducing the blackout area. The asynchronous backtracking algorithm is used to solve the AER model based on CSP, the values of the agents can be exchanged, and they also can be updated by the influence between the agents and the environment. Finally, the example results indicate the feasibility of the proposed method.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115161788","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5347942
Wei Yang, Hu Zhao, J. Liu
Stability is the main problem which should be improved and solved by modern power system. The control of generator's excitation and valve is the efficient way to enhance and improve stability of power system. On the basis of established researching, this paper designs a kind of coordinated controller of generator's excitation and valve that is based on the fuzzy neural networks. The controller can combine the fuzzy theory and artificial neural networks organically, which is applicable to multilayer feedforwad BP network and fuzzy inference control model. The self-learning network can modify weights to realize self-learning control of fuzzy neural networks. Coordinated controller of generator's excitation and valve is simulated by the SMIBS. The computer simulation shows better stability and dynamic feature which is based on the fuzzy neural networks. Coordinated controller of generator's excitation and valve owns stronger robustness under different situations of fault.
{"title":"A study on the coordinated controller of generator's excitation and valve based on the fuzzy neural networks","authors":"Wei Yang, Hu Zhao, J. Liu","doi":"10.1109/SUPERGEN.2009.5347942","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347942","url":null,"abstract":"Stability is the main problem which should be improved and solved by modern power system. The control of generator's excitation and valve is the efficient way to enhance and improve stability of power system. On the basis of established researching, this paper designs a kind of coordinated controller of generator's excitation and valve that is based on the fuzzy neural networks. The controller can combine the fuzzy theory and artificial neural networks organically, which is applicable to multilayer feedforwad BP network and fuzzy inference control model. The self-learning network can modify weights to realize self-learning control of fuzzy neural networks. Coordinated controller of generator's excitation and valve is simulated by the SMIBS. The computer simulation shows better stability and dynamic feature which is based on the fuzzy neural networks. Coordinated controller of generator's excitation and valve owns stronger robustness under different situations of fault.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115641567","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348033
X. Hong, Jing Rulin, Ni Weidou, Guo Xiaodan
Based on the analysis of the typical combined cycles the hydrogen and oxygen hybrid cycle was carried out. From the result of the calculation some conclusions can be drawn that the efficiency of the Hydrogen and Oxygen cycle increases with the increases of the temperature and the maximum pressure of the cycle. The efficiency reached 62% when the temperature is at 1700°C and the pressure is at 30MPa. There is a good ratio in the middle pressure gas turbine and a fine ratio distribution between the middle pressure gas turbine and high pressure gas turbine. When the temperature is 1500°C, the maximum pressure is at 30MPa and the ratio is 8.0 the efficiency can achieve 60.5%, at the same time the fine ratio distribution is at the point of 1.43. The fine ratio distribution decreases with the total ratio of the gas turbine in the sub-critical area while it decreases at first and increases latterly in the supercritical domain there is a transition point at total ratio value of 30. The hydrogen and oxygen hybrid cycle system can obtain a higher efficiency by using optimization method on the recuperation and reheat systems.
{"title":"Analysis of hydrogen and oxygen hybrid cycle","authors":"X. Hong, Jing Rulin, Ni Weidou, Guo Xiaodan","doi":"10.1109/SUPERGEN.2009.5348033","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348033","url":null,"abstract":"Based on the analysis of the typical combined cycles the hydrogen and oxygen hybrid cycle was carried out. From the result of the calculation some conclusions can be drawn that the efficiency of the Hydrogen and Oxygen cycle increases with the increases of the temperature and the maximum pressure of the cycle. The efficiency reached 62% when the temperature is at 1700°C and the pressure is at 30MPa. There is a good ratio in the middle pressure gas turbine and a fine ratio distribution between the middle pressure gas turbine and high pressure gas turbine. When the temperature is 1500°C, the maximum pressure is at 30MPa and the ratio is 8.0 the efficiency can achieve 60.5%, at the same time the fine ratio distribution is at the point of 1.43. The fine ratio distribution decreases with the total ratio of the gas turbine in the sub-critical area while it decreases at first and increases latterly in the supercritical domain there is a transition point at total ratio value of 30. The hydrogen and oxygen hybrid cycle system can obtain a higher efficiency by using optimization method on the recuperation and reheat systems.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117131404","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348044
Jun-jiao Zhang, Xiaohua Huo, C. Dong, Yongping Yang
Based on Aspen Plus, a computer simulation model for sludge gasification was developed. The influences of moisture content in sludge, gasification pressure and equivalence ratio(ER) were considered. The results showed that, the producer gas were mainly CO, H2, CO2 and H2O with little H2S, CH4, while SO2 and N2 were almost none; with the increase in sludge moisture content, ER should be increased in order to maintain the temperature at 1273K; with the increase in ER, CO and H2 decreased which led to the decrease of the calorific value of the producer gas; With the increase in gasification pressure, H2S and CH4 increased while CO and H2 decreased. The calorific value slightly increased with the increase in gasification pressure.
{"title":"High-temperature oxygen gasification of sludge","authors":"Jun-jiao Zhang, Xiaohua Huo, C. Dong, Yongping Yang","doi":"10.1109/SUPERGEN.2009.5348044","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348044","url":null,"abstract":"Based on Aspen Plus, a computer simulation model for sludge gasification was developed. The influences of moisture content in sludge, gasification pressure and equivalence ratio(ER) were considered. The results showed that, the producer gas were mainly CO, H<inf>2</inf>, CO<inf>2</inf> and H<inf>2</inf>O with little H<inf>2</inf>S, CH<inf>4</inf>, while SO<inf>2</inf> and N<inf>2</inf> were almost none; with the increase in sludge moisture content, ER should be increased in order to maintain the temperature at 1273K; with the increase in ER, CO and H<inf>2</inf> decreased which led to the decrease of the calorific value of the producer gas; With the increase in gasification pressure, H<inf>2</inf>S and CH<inf>4</inf> increased while CO and H<inf>2</inf> decreased. The calorific value slightly increased with the increase in gasification pressure.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117244538","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348045
Xiaolei Zhang, C. Dong, Jun-jiao Zhang, D. Jiang, Yongping Yang
The reaction mechanism of CO and Fe2O3 in a chemical-looping combustion (CLC) was studied based on density functional theory (DFT) at B3LYP level in this paper. The structures of all reactants, intermediate, transition structures and products of this reaction had been optimized and characterized. The reaction path was validated by means of the intrinsic reaction coordinate (IRC) approach. The result showed that the reaction was divided into two steps, the adsorbed CO molecule on Fe2O3 surface formed a medium state with one broken Fe-O bond in step1, and in step2, O atom broken here oxidized a subsequent CO molecule in the fuel reactor. Thus, Fe2O3 molecule transport O from air to oxide CO continually in the CLC process. The activation energy and rate coefficients of the two steps were also obtained.
{"title":"The reaction path of CO and Fe2O3 in a chemical-looping combustion system","authors":"Xiaolei Zhang, C. Dong, Jun-jiao Zhang, D. Jiang, Yongping Yang","doi":"10.1109/SUPERGEN.2009.5348045","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348045","url":null,"abstract":"The reaction mechanism of CO and Fe2O3 in a chemical-looping combustion (CLC) was studied based on density functional theory (DFT) at B3LYP level in this paper. The structures of all reactants, intermediate, transition structures and products of this reaction had been optimized and characterized. The reaction path was validated by means of the intrinsic reaction coordinate (IRC) approach. The result showed that the reaction was divided into two steps, the adsorbed CO molecule on Fe2O3 surface formed a medium state with one broken Fe-O bond in step1, and in step2, O atom broken here oxidized a subsequent CO molecule in the fuel reactor. Thus, Fe2O3 molecule transport O from air to oxide CO continually in the CLC process. The activation energy and rate coefficients of the two steps were also obtained.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127112872","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348032
Y. Zhang, V. Mann, D. Reed, A. Walton, I. R. Harris, D. Book
Ball milling is an effective way of producing defective and nanostructured graphite. In this work, graphite was milled under 3 bar hydrogen in a tungsten carbide milling pot, and the effect of milling conditions on the microstructure and hydrogen storage properties was investigated by TGA-Mass Spectrometry, XRD, SEM and Raman spectroscopy. After milling for 10 hours, 5.5 wt% hydrogen was released upon heating under argon to 990°C. After milling for 40 hours, the graphite became significantly more disordered, and the amount of hydrogen desorbed upon heating decreased.
{"title":"Hydrogen storage properties of nanostructured graphite-based materials","authors":"Y. Zhang, V. Mann, D. Reed, A. Walton, I. R. Harris, D. Book","doi":"10.1109/SUPERGEN.2009.5348032","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348032","url":null,"abstract":"Ball milling is an effective way of producing defective and nanostructured graphite. In this work, graphite was milled under 3 bar hydrogen in a tungsten carbide milling pot, and the effect of milling conditions on the microstructure and hydrogen storage properties was investigated by TGA-Mass Spectrometry, XRD, SEM and Raman spectroscopy. After milling for 10 hours, 5.5 wt% hydrogen was released upon heating under argon to 990°C. After milling for 40 hours, the graphite became significantly more disordered, and the amount of hydrogen desorbed upon heating decreased.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124808005","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 : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5348221
Jinfu Chen, Rongqi Fan, X. Duan, Jingliang Cao
Great changes will happen to the distribution network structure with the distributed generation(DG) connected into the network, and the power flow and short-circuit current in distribution network will also change correspondingly. All of these have effects on the normal operation of relay protection device in distribution network. The more DGs are connected into the network, the greater influence on the operation of relay protection device. In order to guarantee reliable action of the original relay protection device in distribution network, it's necessary to study on the maximum penetration level of DG. In this paper, the effects of DG on distribution network current protection is analyzed. A calculation model of distribution network with DGs is built taking into account reliable action of relay protection device constraints, and a calculation method based on niche genetic algorithm is proposed which is explained by example of a 34 nodes multiple DGs system.
{"title":"Penetration level optimization for DG considering reliable action of relay protection device constrains","authors":"Jinfu Chen, Rongqi Fan, X. Duan, Jingliang Cao","doi":"10.1109/SUPERGEN.2009.5348221","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348221","url":null,"abstract":"Great changes will happen to the distribution network structure with the distributed generation(DG) connected into the network, and the power flow and short-circuit current in distribution network will also change correspondingly. All of these have effects on the normal operation of relay protection device in distribution network. The more DGs are connected into the network, the greater influence on the operation of relay protection device. In order to guarantee reliable action of the original relay protection device in distribution network, it's necessary to study on the maximum penetration level of DG. In this paper, the effects of DG on distribution network current protection is analyzed. A calculation model of distribution network with DGs is built taking into account reliable action of relay protection device constraints, and a calculation method based on niche genetic algorithm is proposed which is explained by example of a 34 nodes multiple DGs system.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126097648","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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