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Large Engineering Systems Conference on Power Engineering, 2003最新文献

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LC compensators based on cost minimization for nonlinear loads 基于成本最小化的非线性负载LC补偿器
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204694
M. Aziz, E. El-Zahab, A. Zobaa
{"title":"LC compensators based on cost minimization for nonlinear loads","authors":"M. Aziz, E. El-Zahab, A. Zobaa","doi":"10.1109/LESCPE.2003.1204694","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204694","url":null,"abstract":"This paper describes an optimization method for the evaluation of the parameters of the LC compensator for nonlinear loads taking into account cost constraints. The solution will be obtained with an optimization algorithm based on the reduced gradient technique which will locate the maximum power factors by searching along the constant-cost power factor ridges, for the point where the gradient of the transmission loss is zero.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595791","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: 18
Distribution level STATCOMs (DSTATCOMs) for load voltages support 配电级STATCOMs (DSTATCOMs)用于负载电压支持
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204675
S. Kincic, A. Chandra
{"title":"Distribution level STATCOMs (DSTATCOMs) for load voltages support","authors":"S. Kincic, A. Chandra","doi":"10.1109/LESCPE.2003.1204675","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204675","url":null,"abstract":"In this paper we investigate impact of distributed compensators on power system voltages in steady state. We use the principle of the superposition to show that it is more efficient, in terms of VArs supplied to power system, to provide voltage support in load centers at distribution side of bulk power delivery substation then on its transmission side. The case one incoming transmission radial line-one bulk power delivery substation is transposed to more general one incoming transmission line delivering power to N outgoing distribution circuits where each distribution circuit has its own static VAr system providing voltage support. The line is firstly modeled as lumped inductance and later, distributed parameters are used. The higher efficiency of N distributed compensators on distribution side versus one lumped compensator on transmission side of substation is proven using Kirchhoff's laws. The feasibility of proposed voltage support scheme is demonstrated by vector diagrams and detailed numerical simulation. The simulation is performed by Hypersim, a real time simulator and software for great accuracy developed by Hydro-Quebec research institute.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133721450","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: 6
Development of a series of optically isolated and fibre-optic coupled gate drivers for medium and high power IGBTs 中大功率igbt系列光隔离和光纤耦合栅极驱动器的研制
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204681
Liuchen Chang
{"title":"Development of a series of optically isolated and fibre-optic coupled gate drivers for medium and high power IGBTs","authors":"Liuchen Chang","doi":"10.1109/LESCPE.2003.1204681","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204681","url":null,"abstract":"In modern IGBT power converters, gate drivers are required to perform multiple essential functions such as electrical isolation, current amplification, control logic, over-current and under-voltage protections. This paper presents design considerations, working principles and performance waveforms of a series of self-contained gate driver modules for medium and high power IGBTs. A series of optically isolated and fibre-optic coupled IGBT gate drivers has been developed. These modules include isolated switching mode power supplies, current amplification circuits, logic protection functions, and IGBT short circuit protections. These modules have provided a flexible and convenient method for IGBT converter design. Users need only to provide standard TTL control signals or optical signals in addition to a nonisolated unregulated control power source to the driver modules in order to control the switching of IGBT devices. These driver modules have been applied in various power electronic converters and solid state switches ranging from 75 A to 600 A. These driver modules can also be used for high current MOSFET devices.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130154305","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: 4
Transaction impact analysis and its application in electricity markets 交易影响分析及其在电力市场中的应用
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204670
Hong Chen, C. Cañizares
{"title":"Transaction impact analysis and its application in electricity markets","authors":"Hong Chen, C. Cañizares","doi":"10.1109/LESCPE.2003.1204670","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204670","url":null,"abstract":"System security considerations are becoming more critical for healthy and efficient electricity market operation. This paper defines and quantitatively analyzes transaction impact based on a system security index (SSI), which is defined to properly represent system security, and thus detect transmission congestion, taking into account thermal, voltage and voltage stability constraints. A simple and efficient method to determine the most effective market rescheduling strategy for transmission congestion relief is also presented based on a transaction impact analysis. The proposed technique is tested in a 3-area test system and a 129-bus model of a realistic system.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"285 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114057550","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
A higher order interior point method to minimize active power loss in electric energy systems 最小化电力系统有功损耗的高阶内点法
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204702
M. J. Rider, V. L. Paucar, A. Garcia, M. Bedriñana
{"title":"A higher order interior point method to minimize active power loss in electric energy systems","authors":"M. J. Rider, V. L. Paucar, A. Garcia, M. Bedriñana","doi":"10.1109/LESCPE.2003.1204702","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204702","url":null,"abstract":"In this paper the active power loss minimization problem is formulated as an optimal power flow (OPF), including equality and inequality nonlinear constraints which represent the power system security conditions. The OPF has been solved using the multiple predictor-corrector interior point method, of the family of higher order interior point methods, enhanced with an optimal computation of the step length. The optimal computation of the primal and dual step sizes minimizes the primal and dual objective function errors, respectively, assuring a continuous decrease of the errors during the iterations of the interior point method. The proposed methodology has been applied to minimize the active power loss of the IEEE-30, IEEE-57. IEEE-118 and IEEE-300 bus test systems. Test results indicate that the convergence is facilitated and the number of iterations may be small.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129158284","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
Hydrogen as an energy vector 氢作为能量向量
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204703
T. Bose, P. Bénard
{"title":"Hydrogen as an energy vector","authors":"T. Bose, P. Bénard","doi":"10.1109/LESCPE.2003.1204703","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204703","url":null,"abstract":"Two of the main problems we are facing at the onset of this new century are the early warning signs of a global environmental crisis, and an increased awareness of the finite nature of our fossil fuel sources and their uneven distribution. These challenges favor a transition to a new energy system based on hydrogen, a clean energy vector. In this paper, the challenges to the introduction of hydrogen on the energy market are discussed, as well as the solutions proposed to overcome them.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127870772","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
Towards the formal integration of two upcoming standards: IEC 61970 and IEC 61850 正式整合两个即将推出的标准:IEC 61970和IEC 61850
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204674
T. Kostic, O. Preiss, C. Frei
{"title":"Towards the formal integration of two upcoming standards: IEC 61970 and IEC 61850","authors":"T. Kostic, O. Preiss, C. Frei","doi":"10.1109/LESCPE.2003.1204674","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204674","url":null,"abstract":"The constant demand for a better integration of utility applications and systems raises the question on the compatibility of standards that were, and still are being developed for the individual utility disciplines. This paper discusses the need for an integration of two particularly important emerging standards related to data interchange in substations (IEC 61850) and control centres (IEC 61970). The relatively independent development of these two standards motivated us to create a model that can show explicitly how concepts from one standard relate to those of the other. Further, by making these models formal, which in the case of IEC 61850 is absent in its current draft, we can show the benefits in checking internal model consistency and in automating the model mapping. Practically, our UML models proved helpful in detecting inconsistencies in draft versions of the IEC 61850 and they served as a basis for the tool-based, bi-directional mapping of IEC 61850 to IEC 61970 data representations.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127257863","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: 56
A flexible soft starting energy efficient speed control scheme for inrush-type induction motor 一种涌浪式感应电动机柔性软起动节能调速方案
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204679
A. Sharaf, S. Murugan
{"title":"A flexible soft starting energy efficient speed control scheme for inrush-type induction motor","authors":"A. Sharaf, S. Murugan","doi":"10.1109/LESCPE.2003.1204679","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204679","url":null,"abstract":"The paper presents a novel hybrid switched/PWM-modulated power filter and capacitor compensator (HPFCC) scheme for compensating large motorized loads and AC arc type load inrush currents. The novel scheme utilizes a tri-loop dynamic stabilization controller to ensure a combined voltage stabilization, inrush-current limitation as well as harmonic reduction and power quality enhancement.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127155345","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
Fuzzy systems application to electric short-term load forecasting. I. Problem formulation 模糊系统在电力短期负荷预测中的应用。一、问题表述
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204691
A. Al-Kandari, S. Soliman, M. El-Hawary
{"title":"Fuzzy systems application to electric short-term load forecasting. I. Problem formulation","authors":"A. Al-Kandari, S. Soliman, M. El-Hawary","doi":"10.1109/LESCPE.2003.1204691","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204691","url":null,"abstract":"Economic secure operation of electric power systems requires good prediction for the electric load twenty four hours ahead. This paper presents the application of fuzzy system to electric short-term load forecasting. Two models are used for modeling the electric load. While in the first model, the load power depends only on the hour on question, the second model is a function of the temperature as well as the hour in question. The problem is formulated as a linear fuzzy regression problem. where the linear programming is used to estimate the middle and spread of each load parameter. A triangular membership function is used, which is symmetrical around the middle. Having identified the fuzzy parameters of the load model, the load can easily be predicted for the next 24 hours. Results for a practical system in operation are offered in the text, for different days of the week, working days and weekend day, where the load power is assumed to be crisp in one test and fuzzy in another test.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126342636","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: 8
Off-line testing of a wavelet packet-based algorithm for discriminating inrush current in three-phase power transformers 基于小波包的三相电力变压器励磁涌流识别算法的离线测试
Large Engineering Systems Conference on Power Engineering, 2003 Pub Date : 2003-05-07 DOI: 10.1109/LESCPE.2003.1204676
S. Saleh, M. Rahman
{"title":"Off-line testing of a wavelet packet-based algorithm for discriminating inrush current in three-phase power transformers","authors":"S. Saleh, M. Rahman","doi":"10.1109/LESCPE.2003.1204676","DOIUrl":"https://doi.org/10.1109/LESCPE.2003.1204676","url":null,"abstract":"This paper introduces a novel current diagnosis and protection technique, which is based on wavelet packet transform (WPT). The WPT algorithm is implemented and tested, where the output of the second level details is able to provide the needed signature to diagnose the type of the current flowing through the transformer. The proposed technique is implemented using Daubechies Mother wavelet, and simulated using MATLAB on differential currents data collected form a prototype three-phase power transformer. The WPT technique performed successfully by identifying different currents data including magnetizing inrush, normal current and different fault currents for different types of loading and energizing conditions.","PeriodicalId":226571,"journal":{"name":"Large Engineering Systems Conference on Power Engineering, 2003","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122274204","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: 12
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