Pub Date : 2009-04-06DOI: 10.1109/SUPERGEN.2009.5347879
S. Kokin, A. Pazderin, E. N. Adarichev
The article deals with the problems of decreasing peaks and possible ways of equalizing curve of power demand in big cities based on the example of Ekaterinburg, Russia's No.3 big city.
本文以俄罗斯第三大城市叶卡捷琳堡为例，探讨了大城市电力需求的降峰问题和均衡曲线的可能途径。
{"title":"Ways of decreasing maximum and equalizing curve of big cities' power demand","authors":"S. Kokin, A. Pazderin, E. N. Adarichev","doi":"10.1109/SUPERGEN.2009.5347879","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347879","url":null,"abstract":"The article deals with the problems of decreasing peaks and possible ways of equalizing curve of power demand in big cities based on the example of Ekaterinburg, Russia's No.3 big city.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"23 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":"128273684","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.2009.5348143
Yongji Chang, Jilai Yu
The increasing capacities of wind power bring influence on power system stability because wind power can produce stochastic behaviors due to special fluctuant characteristics of natural wind. The dynamic simulation method and software considering effect of wind power mainly concentrated on electromagnetic transient and electromechanic transient process, whereas the analysis for the long term dynamic simulation for power system including wind farms is relatively scarce at present. This paper adopts mathematic dynamic model of induction wind generating set and double-fed induction generators respectively, and makes use of dynamic simulation method based on variables grouping and seceding grouping strategy, realizes long term dynamic simulation for power system including wind farms under different wind condition and operating mode based on a modified IEEE-30 bus network. The numerical example shows that dynamic simulation method being adopted is suitable for long term dynamic simulation of power system including wind farms, and also shows that doubly fed induction wind turbines have better stability characteristic than asynchronous induction wind turbines and can improve system stability characteristic.
{"title":"Long term dynamic simulation for power system including wind farms","authors":"Yongji Chang, Jilai Yu","doi":"10.1109/SUPERGEN.2009.5348143","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348143","url":null,"abstract":"The increasing capacities of wind power bring influence on power system stability because wind power can produce stochastic behaviors due to special fluctuant characteristics of natural wind. The dynamic simulation method and software considering effect of wind power mainly concentrated on electromagnetic transient and electromechanic transient process, whereas the analysis for the long term dynamic simulation for power system including wind farms is relatively scarce at present. This paper adopts mathematic dynamic model of induction wind generating set and double-fed induction generators respectively, and makes use of dynamic simulation method based on variables grouping and seceding grouping strategy, realizes long term dynamic simulation for power system including wind farms under different wind condition and operating mode based on a modified IEEE-30 bus network. The numerical example shows that dynamic simulation method being adopted is suitable for long term dynamic simulation of power system including wind farms, and also shows that doubly fed induction wind turbines have better stability characteristic than asynchronous induction wind turbines and can improve system stability characteristic.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"65 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":"128276758","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.2009.5347958
M. Zhu, M. Judd, P. Moore, R. Zhang
Condition monitoring plays an increasingly important role in the asset management of the electricity transmission infrastructure. More accurate tracking of the plant health could be achieved through the addition of more sensors. The installation or operating costs of more sensors could outweigh the benefits they bring due to the requirement for new cabling or battery maintenance respectively. The proposed energy harvesting device could enable new generation of wireless sensors to be maintenance free over their lifetime and drastically reduce the cost of adding more sensors.
{"title":"Energy harvesting technique for powering autonomous sensors within substations","authors":"M. Zhu, M. Judd, P. Moore, R. Zhang","doi":"10.1109/SUPERGEN.2009.5347958","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347958","url":null,"abstract":"Condition monitoring plays an increasingly important role in the asset management of the electricity transmission infrastructure. More accurate tracking of the plant health could be achieved through the addition of more sensors. The installation or operating costs of more sensors could outweigh the benefits they bring due to the requirement for new cabling or battery maintenance respectively. The proposed energy harvesting device could enable new generation of wireless sensors to be maintenance free over their lifetime and drastically reduce the cost of adding more sensors.","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":"128294016","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.2009.5348154
Longhua Zhou, Qing Fu, Xiangfeng Li, Changshu Liu
Nowadays, photovoltaic power systems are widely accepted due to the worldwide energy shortage. To attain near sinusoidal outputs of the grid-connected photovoltaic system, improve the power quality, and decrease the energy loss, this work presents a novel Photovoltaic Grid-connected Power Conditioner (PVPC) system based on a hybrid multilevel inverter. In the proposed structure, each phase of the inverter is composed of two H-bridge converters, and the two converters are connected by two grid transformers to generate 9 voltage levels. The PVPC is integrated with reactive power compensation and active power, in this way, PVPC not only can provide active power and reactive power, but also can improve the power quality in the power system. Then, a Space Vector Pulse-width Modulation (SVPWM) is employed in this work, this method can solve the application shortage of hybrid PWM method. At last, simulation results on a 380V/13KW laboratory are presented to validate the proposed PVPC system.
{"title":"A novel photovoltaic grid-connected power conditioner employing hybrid multilevel inverter","authors":"Longhua Zhou, Qing Fu, Xiangfeng Li, Changshu Liu","doi":"10.1109/SUPERGEN.2009.5348154","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348154","url":null,"abstract":"Nowadays, photovoltaic power systems are widely accepted due to the worldwide energy shortage. To attain near sinusoidal outputs of the grid-connected photovoltaic system, improve the power quality, and decrease the energy loss, this work presents a novel Photovoltaic Grid-connected Power Conditioner (PVPC) system based on a hybrid multilevel inverter. In the proposed structure, each phase of the inverter is composed of two H-bridge converters, and the two converters are connected by two grid transformers to generate 9 voltage levels. The PVPC is integrated with reactive power compensation and active power, in this way, PVPC not only can provide active power and reactive power, but also can improve the power quality in the power system. Then, a Space Vector Pulse-width Modulation (SVPWM) is employed in this work, this method can solve the application shortage of hybrid PWM method. At last, simulation results on a 380V/13KW laboratory are presented to validate the proposed PVPC system.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"23 4 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":"129607106","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.2009.5348096
Yuan-zhang Sun, Jin Lin, Guo-jie Li, Xiong Li
With the development of wind energy and power electric control technology, more wind farms with variable speed wind turbine systems (VSWTS) are integrated into power grids. While VSWTSs improve the stability and power quality of systems, several new problems are introduced in power grid. This paper provides an overview to the relevant latest research issues related to the integration of wind farms with VSWTSs.
{"title":"A review on the integration of wind farms with variable speed wind turbine systems into power systems","authors":"Yuan-zhang Sun, Jin Lin, Guo-jie Li, Xiong Li","doi":"10.1109/SUPERGEN.2009.5348096","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348096","url":null,"abstract":"With the development of wind energy and power electric control technology, more wind farms with variable speed wind turbine systems (VSWTS) are integrated into power grids. While VSWTSs improve the stability and power quality of systems, several new problems are introduced in power grid. This paper provides an overview to the relevant latest research issues related to the integration of wind farms with VSWTSs.","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":"127524270","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.2009.5348161
Bahman Khaki, M. H. Asgari, R. Sirjani, A. Mozdawar
Wind power has become the fastest growing renewable energy source around the world, and has become relatively large proportion of total system generation and this procedure will be continuing in future, because of wind power global preference. Because variable speed wind turbine generation (WTG) connects to power system indirectly through converters and other power electronic devices, this makes the generation system dynamic behavior different from conventional generations and decouples the rotor of generator from other parts of power system, so power system inertia will decrease by addition of variable speed WTG. Therefore, if renewable energy systems in today's power system don't capable of contribution in frequency control, rate of change of system frequency (ROCOF) will be increase, and loss of generation or change in system loading may result in critical conditions such as blackout in the system. Meanwhile, modification of wind energy systems inertial response characteristics, or considering internal frequency control loop is necessary to facilitate the increasing integration of wind generation level in power systems. Therefore, the complete dynamic model of Doubly-fed WTG systems are implemented to investigate the possibility of their contribution in primary frequency control.
{"title":"Contribution of DFIG wind turbines to system frequency control","authors":"Bahman Khaki, M. H. Asgari, R. Sirjani, A. Mozdawar","doi":"10.1109/SUPERGEN.2009.5348161","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348161","url":null,"abstract":"Wind power has become the fastest growing renewable energy source around the world, and has become relatively large proportion of total system generation and this procedure will be continuing in future, because of wind power global preference. Because variable speed wind turbine generation (WTG) connects to power system indirectly through converters and other power electronic devices, this makes the generation system dynamic behavior different from conventional generations and decouples the rotor of generator from other parts of power system, so power system inertia will decrease by addition of variable speed WTG. Therefore, if renewable energy systems in today's power system don't capable of contribution in frequency control, rate of change of system frequency (ROCOF) will be increase, and loss of generation or change in system loading may result in critical conditions such as blackout in the system. Meanwhile, modification of wind energy systems inertial response characteristics, or considering internal frequency control loop is necessary to facilitate the increasing integration of wind generation level in power systems. Therefore, the complete dynamic model of Doubly-fed WTG systems are implemented to investigate the possibility of their contribution in primary frequency control.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"50 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":"127209996","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.2009.5348334
Wenxia Liu, Xu Yang, Meng Ye, Jianhua Zhang
Installing subsection switches on distribution network feeders is an effective measure to improve system reliability. In this paper, based on value engineering, a new method is presented to determine optimal subsection scheme. By application of value engineering theory, a new objective function is constructed. The new objective function, based on cost-benefit analysis, is constructed by reference to theory of value, function and cost in value engineering. The new objective function could more clearly reflect the value relationship between improved reliability and increased input costs. This proposed method not only broadens the applicable scope of value engineering, but also makes better combination of reliability and economy. Finally, the proposed method has been tested on the IEEE RBTS-2 bus system. Test results indicate that solution solved by the improved function is more superior to that of the original objective function, which has proved effectiveness and scientific of this new method.
{"title":"Optimal subsection of distribution network feeders based on value engineering","authors":"Wenxia Liu, Xu Yang, Meng Ye, Jianhua Zhang","doi":"10.1109/SUPERGEN.2009.5348334","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348334","url":null,"abstract":"Installing subsection switches on distribution network feeders is an effective measure to improve system reliability. In this paper, based on value engineering, a new method is presented to determine optimal subsection scheme. By application of value engineering theory, a new objective function is constructed. The new objective function, based on cost-benefit analysis, is constructed by reference to theory of value, function and cost in value engineering. The new objective function could more clearly reflect the value relationship between improved reliability and increased input costs. This proposed method not only broadens the applicable scope of value engineering, but also makes better combination of reliability and economy. Finally, the proposed method has been tested on the IEEE RBTS-2 bus system. Test results indicate that solution solved by the improved function is more superior to that of the original objective function, which has proved effectiveness and scientific of this new method.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"1 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":"130101744","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.2009.5348162
C. Jeynes, G. Zoppi, I. Forbes, M. Bailey, N. Peng
There are many technical challenges in the fabrication of devices from novel materials. The characterization of these materials is critical in the development of efficient photovoltaic systems. We show how the application of recent advances in MeV IBA, providing the self-consistent treatment of RBS (Rutherford backscattering) and PIXE (particle induced X-ray emission) spectra, makes a new set of powerful complementary depth profiling techniques available for all thin film technologies, including the chalcopyrite compound semiconductors. We will give and discuss a detailed analysis of a CuInAl metallic precursor film, showing how similar methods are also applicable to other films of interest.
{"title":"Characterisation of thin film chalcogenide PV materials using MeV ion beam analysis","authors":"C. Jeynes, G. Zoppi, I. Forbes, M. Bailey, N. Peng","doi":"10.1109/SUPERGEN.2009.5348162","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348162","url":null,"abstract":"There are many technical challenges in the fabrication of devices from novel materials. The characterization of these materials is critical in the development of efficient photovoltaic systems. We show how the application of recent advances in MeV IBA, providing the self-consistent treatment of RBS (Rutherford backscattering) and PIXE (particle induced X-ray emission) spectra, makes a new set of powerful complementary depth profiling techniques available for all thin film technologies, including the chalcopyrite compound semiconductors. We will give and discuss a detailed analysis of a CuInAl metallic precursor film, showing how similar methods are also applicable to other films of interest.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"89 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":"130622297","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.2009.5347977
Nian Liu, Jianhua Zhang, Xu Wu, Hao Zhang
Information security risk assessment combined with power control process is not a properly resolve problem, the lack of asset identification method accord with characteristics of power information systems is one of the main factors. Network-based substation automation systems (SAS) are typical power information systems, based on the analysis of difficulties on asset identification, a complete information asset identification method is introduced from three aspects, includes asset classification, task identification, and asset valuation. In the asset classification, combined with the IEC 61850 standard, a structured asset model is defined based on association of actual intelligent electronic devices and virtual logical nodes. In the task identification, take functions of substation automation as the object of task, the concept of function graph is defined to reflect the logical relations between functions and assets, as well as the logical relation between the assets. In the asset valuation, two levels of asset value include function level and substation level, are defined to quantify the information security properties of assets and the effects of possible accidents. Finally, an evaluation instance is constructed from IEC 61850 standard, the proposed method is applicable to asset identification of network-based SAS.
{"title":"A qualitative identification method for information assets of substation automation systems","authors":"Nian Liu, Jianhua Zhang, Xu Wu, Hao Zhang","doi":"10.1109/SUPERGEN.2009.5347977","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5347977","url":null,"abstract":"Information security risk assessment combined with power control process is not a properly resolve problem, the lack of asset identification method accord with characteristics of power information systems is one of the main factors. Network-based substation automation systems (SAS) are typical power information systems, based on the analysis of difficulties on asset identification, a complete information asset identification method is introduced from three aspects, includes asset classification, task identification, and asset valuation. In the asset classification, combined with the IEC 61850 standard, a structured asset model is defined based on association of actual intelligent electronic devices and virtual logical nodes. In the task identification, take functions of substation automation as the object of task, the concept of function graph is defined to reflect the logical relations between functions and assets, as well as the logical relation between the assets. In the asset valuation, two levels of asset value include function level and substation level, are defined to quantify the information security properties of assets and the effects of possible accidents. Finally, an evaluation instance is constructed from IEC 61850 standard, the proposed method is applicable to asset identification of network-based SAS.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"81 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":"132476520","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.2009.5348215
Zhang Guowei, Wei Tongzhen, H. Shengli, Kong Lingzhi
This paper describes a new control scheme of grid connected inverter of DG (distributed generation) under unbalanced grid voltage. In this paper, the proposed scheme of synchronous reference frame (SRF) controller can reduce the influence of unbalanced grid voltage, which is mainly caused by unbalanced distribution of single-phase and non-linear loads, etc. In order to realize the control goal, a positive SRF which rotates counterclockwise and a negative SRF which rotates clockwise are used to control the positive sequence current and negative sequence current, separately. According to PF =1 of grid side and average output active power is constant, the positive sequence reference current and negative sequence reference current are obtained. The positive sequence ac link feedback current is derived through a notch filter to eliminate the 100Hz negative sequence in the positive SRF. The same as the negative sequence ac link feedback current. The effectiveness of the proposed scheme has been demonstrated through computer simulation.
{"title":"The control for grid connected inverter of distributed generation under unbalanced grid voltage","authors":"Zhang Guowei, Wei Tongzhen, H. Shengli, Kong Lingzhi","doi":"10.1109/SUPERGEN.2009.5348215","DOIUrl":"https://doi.org/10.1109/SUPERGEN.2009.5348215","url":null,"abstract":"This paper describes a new control scheme of grid connected inverter of DG (distributed generation) under unbalanced grid voltage. In this paper, the proposed scheme of synchronous reference frame (SRF) controller can reduce the influence of unbalanced grid voltage, which is mainly caused by unbalanced distribution of single-phase and non-linear loads, etc. In order to realize the control goal, a positive SRF which rotates counterclockwise and a negative SRF which rotates clockwise are used to control the positive sequence current and negative sequence current, separately. According to PF =1 of grid side and average output active power is constant, the positive sequence reference current and negative sequence reference current are obtained. The positive sequence ac link feedback current is derived through a notch filter to eliminate the 100Hz negative sequence in the positive SRF. The same as the negative sequence ac link feedback current. The effectiveness of the proposed scheme has been demonstrated through computer simulation.","PeriodicalId":250585,"journal":{"name":"2009 International Conference on Sustainable Power Generation and Supply","volume":"27 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":"132178299","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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