2010 International Conference on Power System Technology最新文献

{"title":"Wind speed forecasting: Present status","authors":"M. Bhaskar, Amit Jain, N. Venkata Srinath","doi":"10.1109/POWERCON.2010.5666623","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666623","url":null,"abstract":"A number of wind speed forecasting techniques are available in order to predict the uncertainty of the wind, which is key to estimate wind power generation availability for the grid. It is gaining more attention with the recent evolution of smart grid, which throws a challenge of integrating wind power into the grid. Several methods have been proposed to provide wind speed prediction. In the recent years there is a lot of research happening to predict wind speed with several mathematical methods and biologically inspired computing techniques to reduce the prediction error. In this paper a detailed survey of the wind speed forecasting techniques have been provided since past 15 years. An attempt is also made to identify different wind forecasting providers available in the market. This survey will be very useful to the new researchers working in this area of research. This survey will also be helpful to the wind farm owners to understand the current wind prediction model capabilities and will gives them an idea which model will be suitable for predicting the wind speed at their wind farms.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115611273","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}

{"title":"Application of PRA methodology in Chongqing transmission system","authors":"Yang Dongjiao, L. Xinyu, Sun Lu, Li Fang, Lui JingJing","doi":"10.1109/POWERCON.2010.5666719","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666719","url":null,"abstract":"Power system reliability is always one of the most important requirements in system operation and planning. For a long time, deterministic methods are widely used in system analysis, such as N-1 rule in transmission system static analysis, but the probability characteristics of the components failure have been ignored, and the risk of actual system can't been obtained exactly. Recently, large-range blackouts occurred frequently all over the world, especially in transmission system because of its numerous components and complex operation modes, which made the experts to worry about the effectiveness of the old methods, then a new way of assessing system risk is needed urgently. Probabilistic Reliability Assessment (PRA) Methodology firstly proposed by EPRI is a new method to perform risk-based reliability assessment. Unlike traditional deterministic methods, PRA Methodology calculates a measure of the probability of undesirable events and a measure of the severity or impact of the events, then combines them into a single reliability index - Probabilistic Reliability Index (PRI) and develops PRI program based on PRA Methodology. So far PRA Methodology has been widely accepted in North America and already been used by many utilities since 2001, but it hasn't been introduced into the domestic power system. In this paper, PRA Methodology is adopted to analysis Chongqing's transmission system of 2009, mainly including of system comprehensive analysis, connection section analysis, specific status analysis, danger point analysis, etc. The research conclusion can be applied to practical operation of the network to help electrical operator to finish their work, such as weak links location, influence range assessment and the optimal scheme choosing, then the system risk can be acquired quantitatively to provide technical support for leader decision and power system planning. This work has demonstrated that the PRA Methodology can address these new uncertainties and significantly improves the ability of conducting effective transmission operational planning.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121826990","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}

{"title":"Protection of series compensation station against lightning intruded wave in 1000kV AC transmission system","authors":"F. Gao, Wei-jiang Chen, Guofu Li, Zhi-fang Liu","doi":"10.1109/POWERCON.2010.5666714","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666714","url":null,"abstract":"Series compensation (SC) is one of the effective measures to increase the transmission capacity of 1000kV Ultra High Voltage (UHV) transmission system. Study on UHV SC technique is an urgently requirement along with the development of UHV transmission system. This paper will focus on the calculation and analysis of lightning withstand capability of SC station in order to confirm insulation level of SC Banks, as well as protection measures of lightning surge. The main connection of SC banks is selected in this paper, and the parameters of relevant equipment are also determined. Simulation models are built up separately on diverse locations for SC installation and under different operation conditions. Lightning fault probability of SC station is studied by the interval combination method. An evaluation on the performances between protection schemes of Lead-in Line Lead-in line protection and MOAs in station is carried out. Furthermore, a reasonable solution is proposed for the protection scheme of lightning intruded wave in UHV SC station.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117115392","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}

{"title":"Investigation of TRV across circuit-breaker of series compensated double-circuit UHV transmission lines","authors":"Z. Xiang, Jiming Lin, L. Ban, B. Zheng","doi":"10.1109/POWERCON.2010.5666530","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666530","url":null,"abstract":"State Grid Corporation of China plans to build the Huainan-Wannan-Zhebei-Huxi UHV double-circuit transmission project and install series capacitors (SCs) in Huainan-Wannan transmission lines. During the circuit breakers clearing system faults on series compensated transmission line, the transient recovery voltage (TRV) of circuit breaker may be increased due to the impact of series capacitor. If there is no countermeasure, the TRV may higher than the limit in circuit breaker standard. This phenomenon may result in the failure of clearing system fault and the damage of circuit breaker. This paper investigated the influences of series capacitor on TRV. In order to limit the TRV, the fast bypass series capacitor based on system protection and relay system is suggested.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117257960","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}

{"title":"Simulation of high impedance ground fault In electrical power distribution systems","authors":"A. Sedighi, M. Haghifam","doi":"10.1109/POWERCON.2010.5666061","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666061","url":null,"abstract":"A new model of High Impedance Fault (HIF) in electrical power distribution feeders is introduced in this paper. Proposed model is based on Emanuel arc model and contains some features, such as nonlinearity characteristics of HIF and all frequency components up to 12 kHz. Fast Fourier Transform (FFT) and Principal Component Analysis (PCA) are used on real test data to extract and reduce the features. Also Bonferroni confidence interval is applied for comparing simulated models with measured currents. This model contains 6 arc models like Emanuel arc models. Presented model is simulated with ATP/EMTP and probability switch is used for simulating random state of HIF feature. 5 models are developed for several amplitudes of HIF current. All models are accurate for simulation of HIF current.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121370398","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}

{"title":"A realistic algorithm for transient calculation of the electric networks including magnetizing branches","authors":"Zhang Xiaoqing, S. Weidong","doi":"10.1109/POWERCON.2010.5666562","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666562","url":null,"abstract":"A simplified model of magnetic saturation characteristics is proposed in this paper for transient calculation of the electric networks including magnetizing branches. The model represents the magnetic saturation characteristics by the continuous function instead of the piecewise linear approximation. Based on the proposed model, a realistic transient algorithm is developed. The nonlinear differential equations describing the transient behavior of the magnetizing branches are solved by the semi-explicit Runge-Kutta method, in which non-iterative computations are involved. The transient calculation for the remaining linear network is performed in terms of the solution to the magnetizing branches. A comparison is made between calculated and experimental results to confirm the validity of the algorithm.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127249592","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}

{"title":"Hour-ahead wind power and speed forecasting using market basket analysis and radial basis function network","authors":"Yingyi Hong, Ching-Ping Wu","doi":"10.1109/POWERCON.2010.5666634","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666634","url":null,"abstract":"Wind power is one of the most rapidly growing renewable energies for power generation nowadays. However, operation of power systems becomes challenging due to intermittent characteristics from wind energies. Consequently, effective wind power forecasting is crucial because of the economic consideration and operation. This paper presents a novel technique for short-term wind power and wind speed forecasting (1 hour ahead) by using market basket analysis (MBA) and the radial basis function (RBF) neural network. Simulation results obtained by the proposed method are compared with those from traditional methods. Applicability of the proposed method is verified through simulations.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125315235","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}

{"title":"Voltage and frequency control of inverters connected in parallel forming a micro-grid","authors":"Chun-sheng Wu, H. Liao, Zi-long Yang, Yibo Wang, Hong-hua Xu","doi":"10.1109/POWERCON.2010.5666413","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666413","url":null,"abstract":"The “communication mechanism” to realize the power share of grid-forming inverters is analyzed and a droop control method through active and reactive current is proposed in this paper. The control strategies of inverters connected in parallel forming a micro-grid are described in detail. The droop controller is divided into three units that are current (power) decoupling, the first-order inertia and droop control. From the point of synchronous generator, the design principles of first-order inertia constant and the droop coefficients are analyzed. Finally, simulation models are established in Simulink/Matlab and two prototypes with the capacity of 10kVA are established in laboratory. The simulation and experiment results verify the feasibility of the proposed method.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125394711","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}

{"title":"Design and exploitation of supervisory control system for commercial electric vehicle charging station based on virtual DPU technology","authors":"Xiaoxing Zhu, Houtao Chen, Wulin Liu, Jie Luo","doi":"10.1109/POWERCON.2010.5666096","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666096","url":null,"abstract":"Based on virtual distributed processing unit (DPU) technology of distributed control system (DCS), a supervisory control system for commercial electric vehicle charging station was designed and exploited. The real time data exchange between charger and virtual DPU of supervisory control system was realized with CAN bus. Virtual DPU configuration function was used to exploit the control logic and monitoring interface. History data was reliably stored utilizing DCS platform. Fully utilizing mature and stable function of historical trend query, sound and light alarm, operation record, statistical report and fault remembrance in DCS, subsystems of charging, metering and billing, power distribution, entrance guard and video guard were totally monitored. The performance of the supervisory control system can accord with the relevant document regulation and requirement of the State Grid Corporation of China (SGCC), which fully satisfy the requirement of commercialization operation.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125514098","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}

{"title":"Preliminary study of the influence caused by solar storm on Sichuan power grid","authors":"Mingde Cui, Chunming Liu, Lianguang Liu, Xinyuan Zhang","doi":"10.1109/POWERCON.2010.5666667","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666667","url":null,"abstract":"The high current induced by solar storm, namely the geomagnetically induced current (GIC) has been discovered in Jiangsu and Guangdong power grids as well as in other provincial power grids with the development of the long-distance power transmission system in China in recent years, which have resulted in some latent influence on these power grids. Based on the structures of EHVAC in Sichuan, the preliminary estimate for the GIC level in Sichuan power grid had been made by use of the data of ground electric field induced by the typical solar storm with MATLAB simulation software. The results show that the GIC influence on Sichuan power grid under the strong magnetic storm is not optimistic; it should pay a sufficient attention to this problem.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126615544","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}