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2007 IEEE Lausanne Power Tech最新文献

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New Techniques for Field Inspection of Pin Insulators for Medium Voltage Networks 中压电网引脚绝缘子现场检测新技术
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538631
H. de Oliveira, M.L.B. Martinez, I.G. Campos, R.G. de Oliveira, C. de Salles, C. Lefort
{"title":"New Techniques for Field Inspection of Pin Insulators for Medium Voltage Networks","authors":"H. de Oliveira, M.L.B. Martinez, I.G. Campos, R.G. de Oliveira, C. de Salles, C. Lefort","doi":"10.1109/PCT.2007.4538631","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538631","url":null,"abstract":"The aim of this paper is to define a set of new techniques to an efficient field procedure to determine the operational condition of porcelain pin insulators. This intends to assist the maintenance of the distribution networks and the substitution of failed insulators. Considering the technical and economic aspects, two technologies of relatively low cost and easy operation have been applied, detection of ultrasonic and radio interference noises. The results obtained during the field inspections are compared with several tests carried out at the High-Voltage Laboratory of Federal University of Itajuba. From the comparisons of these results the effectiveness of each technology applied to the field research is obtained.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124096363","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}
引用次数: 5
Border-Flow Control by means of Phase Shifting Transformers 基于移相变压器的边界流控制
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538510
J. Verboomen, D. Van Hertem, P. Schavemaker, W. Kling, R. Belmans
{"title":"Border-Flow Control by means of Phase Shifting Transformers","authors":"J. Verboomen, D. Van Hertem, P. Schavemaker, W. Kling, R. Belmans","doi":"10.1109/PCT.2007.4538510","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538510","url":null,"abstract":"In this paper, a control scheme is demonstrated that regulates multiple phase shifting transformers (PSTs) to equally load the interconnectors of a border. A crucial step in the development of the control scheme is the derivation of phase shifter distribution factors (PSDFs), which indicate the influence of a PST on the active power flow on a certain line. Based on these PSDFs, the Linear Least Squares (LLS) method is used to calculate the optimal PST settings. The degree to which an even repartition can be obtained, depends on the number of PSTs in relation to the number of interconnectors. As a case- study, simulations are performed involving the Dutch and Belgian interconnectors.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127599783","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}
引用次数: 23
Active Voltage Level Management of Distribution Networks with Distributed Generation using On Load Tap Changing Transformers 有载分接变换变压器对分布式发电配电网有功电压水平的管理
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538360
A. Kulmala, Kari Mäki, S. Repo, P. Järventausta
{"title":"Active Voltage Level Management of Distribution Networks with Distributed Generation using On Load Tap Changing Transformers","authors":"A. Kulmala, Kari Mäki, S. Repo, P. Järventausta","doi":"10.1109/PCT.2007.4538360","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538360","url":null,"abstract":"In this paper, time domain performance of active voltage level management based on co-ordinated control of substation voltage is studied. A control algorithm that controls the set point of the automatic voltage control (AVC) relay at the substation is proposed and its operation in an example network is tested using PSCAD simulations. The study network is a real distribution network located in south-west Finland which will experience voltage rise problems if a planned wind park is constructed.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128067698","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}
引用次数: 24
Simplified method to assess the uncertainty degree of voltage estimation in active distribution networks 有功配电网电压估计不确定性评定的简化方法
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538356
F. Bignucolo, R. Caldon
{"title":"Simplified method to assess the uncertainty degree of voltage estimation in active distribution networks","authors":"F. Bignucolo, R. Caldon","doi":"10.1109/PCT.2007.4538356","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538356","url":null,"abstract":"The management of future distribution networks involving distributed generation (DG), reactive compensation and/or controllable loads, requires a reliable state estimation (SE) of the system in terms of line flows and bus bar voltages. However traditional SE algorithms, adopted in transmission systems, appear hardly applicable in distribution networks because of the lack of available real time measurements with a consequent high level of uncertainty resulting in the estimations. To overcome this problem an original (non-iterative) process, allowing a preliminary assessment of the uncertainty in voltage estimation, has been developed. The method, based on a performance parameter, here defined as \"variance moment\", gives for a distribution system a quick and simplified evaluation of the network performance in making a SE. This process results also a good technique for optimizing the locations of voltage measurements showing a sensible reduction in the computational effort with respect to traditional methods.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121911789","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}
引用次数: 2
External Network Modeling for MVAr Scheduling in Multi Area Power Systems 多区域电力系统MVAr调度的外部网络建模
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538458
Y. Phulpin, M. Begovic, Marc Petit
{"title":"External Network Modeling for MVAr Scheduling in Multi Area Power Systems","authors":"Y. Phulpin, M. Begovic, Marc Petit","doi":"10.1109/PCT.2007.4538458","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538458","url":null,"abstract":"Multi area power systems work most often with a poor inter-regional coordination about reactive power concerns. Transmission system operators typically do not possess a detailed knowledge about voltage profile across interconnected power systems. In this context, reactive power scheduling may be inefficient and inter-regional reactive power flows become a decisive issue. This inefficiency, associated with economic constraints and increasing stress on interconnection lines, may lead to conflicts, which could be partially avoided with a better scheduling strategy. In addition to inter-utility agreements, part of the solution could be to use appropriate external network modeling. Different modeling are thus presented in this paper and illustrated with an IEEE 118 bus system with 2 separately controlled regions, whose scheduling objective is to minimize active power losses. The regional scheduling process is described and the state of the interconnected power system is compared with a global optimization. Finally, the influence of the external network modeling parameters and the accuracy of their forecast is commented.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130243355","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}
引用次数: 10
Transformer Differential Protection with Neural Network Based Inrush Stabilization 基于神经网络的励磁稳定变压器差动保护
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538488
W. Rebizant, D. Bejmert, L. Schiel
{"title":"Transformer Differential Protection with Neural Network Based Inrush Stabilization","authors":"W. Rebizant, D. Bejmert, L. Schiel","doi":"10.1109/PCT.2007.4538488","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538488","url":null,"abstract":"Application of artificial neural networks (ANN) for transformer differential protection stabilization against inrush conditions is presented. Three versions of the stabilization scheme are described. The best of them employs three ANNs fed with transformer terminal currents that has proven to be superior over the two other ANN schemes. The final solution combines the classification strengths of neural networks with commonly used second harmonic restraint, thus being a hybrid classification unit. To determine the most suitable ANN topology for the inrush classifier a genetic algorithm was used. The developed optimized neural inrush detection units have been tested with EMTP-ATP generated signals, proving better performance than traditionally used stabilization algorithms.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130473711","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}
引用次数: 9
Utilization of Rating Matrices for the Condition Assessment of High-Voltage Equipment 额定矩阵在高压设备状态评估中的应用
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538285
T. Krontiris, G. Balzer
{"title":"Utilization of Rating Matrices for the Condition Assessment of High-Voltage Equipment","authors":"T. Krontiris, G. Balzer","doi":"10.1109/PCT.2007.4538285","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538285","url":null,"abstract":"The assessment of equipment condition is essential for the condition-based maintenance. In this paper the use of decision matrices for condition determination of high-voltage equipment is discussed. This requires a \"rating\" realization of the general decision matrix with adapted key rating criteria describing the equipment under examination. After forming the rating matrix, it is shown how ageing and maintenance can be integrated into the proposed approach. With the integration of ageing and maintenance the rating matrix can yield forecasts for the expected condition of the equipment in the future. The proposed method is then used in order to determine the condition of a high-voltage circuit breaker. It must be emphasized that the term \"condition\" used henceforth does not merely reflect the technical condition of the equipment, but it also includes economical and other aspects. It should also be noticed that, in this paper, the degradation state (rather than the actual condition state) is calculated. This approach offers specific advantages, especially when the effects of ageing or maintenance are being taken into account. Combined with a failure mode, effect and criticality analysis (FMECA), the method can be used in order to calculate the risk associated with the specific piece of equipment.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131524915","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}
引用次数: 1
Short-term forecasting for distribution feeder loads with consumer classification and weather dependent regression 基于用户分类和天气相关回归的配电网负荷短期预测
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538399
Yuan-Kang Wu
{"title":"Short-term forecasting for distribution feeder loads with consumer classification and weather dependent regression","authors":"Yuan-Kang Wu","doi":"10.1109/PCT.2007.4538399","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538399","url":null,"abstract":"Short term load forecasting (STLF) for feeder loads is critical for risk management of distribution companies in a competitive market. In this paper, weather variables and load profile classifications were investigated and their relative effects on the feeder load are reported. Moreover, Forecast techniques including time series models and ANN constructs were used as forecasting tools. Finally, risk assessment on load forecasting errors by using time domain and frequency domain respectively were proposed.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131540651","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}
引用次数: 13
Uncertainty Modeling for the Management of Distributed Generation Units using PSO 基于粒子群算法的分布式发电机组管理的不确定性建模
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538367
V. S. Pappala, I. Erlich
{"title":"Uncertainty Modeling for the Management of Distributed Generation Units using PSO","authors":"V. S. Pappala, I. Erlich","doi":"10.1109/PCT.2007.4538367","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538367","url":null,"abstract":"This paper addresses a multistage stochastic model for the operation of distributed generation (DG) units under stochastic load demands. The stochastic load demands have a significant effect on the economic model of the DG units. The uncertainties are modeled as scenario trees. But as the number of decision making stages increase, the scenario tree becomes extremely large, which leads to complex computation. Therefore a novel approach to generate a scenario tree using classical particle swarm optimization (PSO) approach is presented. The resulting multistage nonlinear stochastic model is solved using adaptive PSO.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132621687","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}
引用次数: 7
Coordinated control and operation of DFIG and FSIG based Wind Farms 基于DFIG和FSIG的风电场的协调控制和运行
2007 IEEE Lausanne Power Tech Pub Date : 2007-07-01 DOI: 10.1109/PCT.2007.4538371
S. Foster, Lie Xu, Brendan Fox
{"title":"Coordinated control and operation of DFIG and FSIG based Wind Farms","authors":"S. Foster, Lie Xu, Brendan Fox","doi":"10.1109/PCT.2007.4538371","DOIUrl":"https://doi.org/10.1109/PCT.2007.4538371","url":null,"abstract":"This paper considers a coordinated control strategy for adjacent FSIG and DFIG based wind farms whereby the reactive power output of the DFIG is prioritised over real power after a fault on the network, in order to boost the FSIG terminal voltage and improve its fault ride through capability. The issue of protection for a DFIG based wind turbine during network fault is also considered. It is seen that the large rotor currents can generally be ascribed to the small converter rating. Different protection arrangements for the converter are examined. The simulation results show that the stability margin of a FSIG can be significantly greater when there is extra reactive power compensation available from a DFIG in the vicinity.","PeriodicalId":356805,"journal":{"name":"2007 IEEE Lausanne Power Tech","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126595057","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}
引用次数: 22
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