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Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)最新文献

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Voltage stability evaluation using the the relation between impedances 基于阻抗关系的电压稳定性评估
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1348203
J. L. Santos, F. Barbosa
{"title":"Voltage stability evaluation using the the relation between impedances","authors":"J. L. Santos, F. Barbosa","doi":"10.1109/MELCON.2004.1348203","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348203","url":null,"abstract":"The increasing loads, the great distances between the production and consumption centers as well as the state of the transport and distribution networks turns the electrical power system operating near its stability limit. When the system gets unstable a blackout situation may occur, which is critical to the system operator and consumers. We have recent examples in United States and Italy where the system was without power for several hours, causing serious problems in hospitals and public transportations. One of the causes of a blackout may be the voltage instability, which turns this subject widely discussed and studied. The speed of evolution of the voltage stability phenomenon allows us to analyze the problem as a static problem rather than a transitory one Kundur, P et al. (1983). This article will show one way to \"measure\" locally the proximity of the system to the voltage stability limit.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124512244","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
Analysis of the insulated power-grid transient behavior after faulted phase tripping 故障脱相后绝缘电网暂态特性分析
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1348219
N. Berbic, A. Nuhanovic, V. Madžarević
{"title":"Analysis of the insulated power-grid transient behavior after faulted phase tripping","authors":"N. Berbic, A. Nuhanovic, V. Madžarević","doi":"10.1109/MELCON.2004.1348219","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348219","url":null,"abstract":"The common cases of a nonselective operation of the phase to ground fault protection in the insulated power grids, which utilize inductive sensors for a voltage unbalance indication, are explained by ferroresonant processes in voltage transformers of healthy drains. This paper deals with phase to ground faults simulations in a known grid, that provide information about possible nonselective phase to ground faults protection operation.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124804283","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
New adaptive laws for model reference adaptive control using a non-quadratic Lyapunov function 基于非二次李雅普诺夫函数的模型参考自适应控制的新自适应律
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346879
M. Rao, H. Hassan
{"title":"New adaptive laws for model reference adaptive control using a non-quadratic Lyapunov function","authors":"M. Rao, H. Hassan","doi":"10.1109/MELCON.2004.1346879","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346879","url":null,"abstract":"In the design of model reference adaptive control (MRAC) schemes, adaptive laws have been developed based on Lyapunov stability theory. Over the past few decades, it has been a common practice to use quadratic Lyapunov functions (QLF). In contrast to such development, using a new nonquadratic Lyapunov function (NQLF), this paper presents new adaptive laws for the MRAC. These new laws have the same advantage of assurance of stability of the overall system, as the earlier adaptive laws developed using the QLF. Over and above, they have an additional advantage of improved performance: in fact, the use of NQLF improved the system output error signal converging to zero. Finally, this paper also presents simulation results supporting the arguments.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129809058","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
A design tool for planar inductors using Cadence software 基于Cadence软件的平面电感器设计工具
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346794
A. Hatzopoulos, P. Bougia
{"title":"A design tool for planar inductors using Cadence software","authors":"A. Hatzopoulos, P. Bougia","doi":"10.1109/MELCON.2004.1346794","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346794","url":null,"abstract":"A design tool in skill language is described in this work, which enhances the RF design and simulation capabilities of the Cadence software. The tool can design the layout of planar inductors and patterned ground shields (at poly layer and also at the n-diffusion or n-well layer) which improve the performance of the inductor. The electrical models that have been included for the simulations are described. Comparative simulation results verify the proper operation of the tool and, thus, it can be included in the Cadence software to facilitate RF designers.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127032332","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
Adaptively biased two-stage amplifier 自适应偏置两级放大器
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346780
M. Loikkanene, J. Kostamovaara
{"title":"Adaptively biased two-stage amplifier","authors":"M. Loikkanene, J. Kostamovaara","doi":"10.1109/MELCON.2004.1346780","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346780","url":null,"abstract":"An adaptively biased amplifier and an adaptive biasing block with almost supply independent behavior are described. Bias currents of the amplifier are adjusted by sensing the input signal amplitude. This adjustment together with a time dependency added to the biasing network causes the adaptively biased amplifier to have approximately the same bandwidth and the same relative stability for large signals as its linear counterpart biased with much higher currents. Simulation results in a 0.35/spl mu/m CMOS process show that in this way significant power reduction can be achieved, especially in applications where load capacitance is large.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129014117","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: 0
Efficient call admission control methods in DiffServ architecture DiffServ架构中有效的呼叫接纳控制方法
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346987
A. Michalas, M. Louta, V. Loumus
{"title":"Efficient call admission control methods in DiffServ architecture","authors":"A. Michalas, M. Louta, V. Loumus","doi":"10.1109/MELCON.2004.1346987","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346987","url":null,"abstract":"In order to achieve absolute QoS guarantees in the DiffServ architecture, admission control procedures have been developed. Their role is to ensure that the admittance of a new flow into the network does not violate service commitments of already established flows and the network could satisfy the constraints of the new flow. In this paper we discuss related work of parameter and measurement based admission control techniques, while a set of results indicative of their performance is provided.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126649603","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
Minimizing the effect of a distorted DC-bus voltage of a STATCOM 减小STATCOM直流母线电压失真的影响
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1348248
B. Blazic, I. Papič
{"title":"Minimizing the effect of a distorted DC-bus voltage of a STATCOM","authors":"B. Blazic, I. Papič","doi":"10.1109/MELCON.2004.1348248","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348248","url":null,"abstract":"This paper proposes a control technique for minimizing the effect of a distorted DC-bus voltage on the operation of a PWM controlled STATCOM. A DC-bus voltage ripple occurs as a consequence of harmonic or unbalanced currents exchange between the compensator and the network and causes additional harmonic distortion on the AC side, which is not permissible for compensator operation. The proposed DC-ripple mitigation technique is based on the modulation of the switching function enabling the device operation with distorted DC-bus voltage and allowing the use of a relatively small capacitor on the DC side. The derived control algorithm is validated by means of digital simulation in the PSCAD/EMTDC program where a case of a STATCOM operating under unbalanced conditions (unbalanced network voltage) was evaluated.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"470 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123879826","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
Examining anycast address supported mobility management using mobile IPv6 testbed 使用移动IPv6测试平台检查任意播地址支持的移动性管理
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346990
I. Dudas, L. Bokor, Gabor Bilek, S. Imre, Sandor Szab, G. Jeney
{"title":"Examining anycast address supported mobility management using mobile IPv6 testbed","authors":"I. Dudas, L. Bokor, Gabor Bilek, S. Imre, Sandor Szab, G. Jeney","doi":"10.1109/MELCON.2004.1346990","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346990","url":null,"abstract":"This paper introduces a new method how mobile IPv6 protocol can be extended easily to work efficiently in the case of micromobility environment. The proposed method reduces the volume of control messages during the mobile operation and results more seamless handover helping real-time applications.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131195340","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
Handling flow limits during maximum loadability determination 在确定最大负载能力时处理流量限制
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1348083
M. Glavic, I. Džafić, S. Tesnjak
{"title":"Handling flow limits during maximum loadability determination","authors":"M. Glavic, I. Džafić, S. Tesnjak","doi":"10.1109/MELCON.2004.1348083","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1348083","url":null,"abstract":"In this paper a methodology that handles a wide range of flow limits by extension and formulation of a continuation power flow so that include generator redispatch when a flow on a given line exceeds some specified limit, is proposed. Four options for active generation redispatch are introduced: based on topology analysis, sensitivity studies, generator margins, and cost considerations. The applicability of the methodology in deregulated environments for operating a power system within its security constraints is discussed in the paper. The power system model is based on a computationally efficient point of collapse power flow. Results of the tests obtained with help of the IEEE-39 and IEEE-118 bus systems are given to illustrate the performance of the methodology.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131643588","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
An extension of the Ziegler-Nichol's method for parametric identification of standard plants 齐格勒-尼科尔标准植物参数辨识方法的扩展
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI: 10.1109/MELCON.2004.1346876
Ž. Jurić, B. Perunicic
{"title":"An extension of the Ziegler-Nichol's method for parametric identification of standard plants","authors":"Ž. Jurić, B. Perunicic","doi":"10.1109/MELCON.2004.1346876","DOIUrl":"https://doi.org/10.1109/MELCON.2004.1346876","url":null,"abstract":"This paper proposes a generalization of the Ziegler-Nichol's (ZN) method which allows parametric identification of a linear plant modeled with one of the simplified standard models of the transfer function. The proposed method, like the standard ZN method, requires only a standard PI or PID controller, without any extra equipment. Moreover, the proposed method allows the identification even if the sustained undamped oscillations are not allowed in the plant. However, more experiments are required in this case.","PeriodicalId":164818,"journal":{"name":"Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127566895","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
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