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European Transactions on Electrical Power最新文献

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Modelling and simulation of unsymmetrical supplied three-phase induction motor 非对称供电三相感应电动机的建模与仿真
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060308
A. Zuckerberger, A. Alexandrovitz
{"title":"Modelling and simulation of unsymmetrical supplied three-phase induction motor","authors":"A. Zuckerberger, A. Alexandrovitz","doi":"10.1002/ETEP.4450060308","DOIUrl":"https://doi.org/10.1002/ETEP.4450060308","url":null,"abstract":"A general mathematical model of a three-phase symmetrical induction motor expressed by means of state equations with line-to-line voltages as input variables is presented. Such a model permits the analysis of the dynamic behaviour of the motor supplied with unsymmetrical sinusoidal or non-sinusoidal voltage wave-forms. Simulation programs were written by means of MATLAB/Simulink software package. The presented model was used to simulate transient behaviour of the motor with unsymmetrical supplied voltages and its operation when fed from a symmetrical source (the mains) and from a six-step inverter. A mathematical model representing the induction motor operated with one phase disconnected was developed and simulated. Experimental results were compared with the simulated ones and good resemblance was observed.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51089975","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
The problem of harmonic compensators location 谐波补偿器的定位问题
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060606
K. Mikolajuk
{"title":"The problem of harmonic compensators location","authors":"K. Mikolajuk","doi":"10.1002/ETEP.4450060606","DOIUrl":"https://doi.org/10.1002/ETEP.4450060606","url":null,"abstract":"Current harmonics can be eliminated in each individual load. Such a compensation generally must be expensive. Harmonics are partly compensated between individual consumers. Therefore, the compensation of group of consumers seems to need lower cost than individual compensation. In the case of group compensation there are two possible approaches. The first approach uses compensators controlled by a current in common buses supplying a cluster of consumers. In the second approach a voltage waveform is chosen as a control data, the compensator should maintain a sinusoidal voltage. Such an approach needs not many compensators to ensure a proper quality of energy delivered. The purpose of the presented paper is to formulate the optimization problem for compensators location in power systems. It is shown that the problem leads to combinatorial optimization. The Travelling Salesman Problem and 0-1 Knapsack Problem are related to the presented combinatorial problem, but it seems, that there is not solved the combinatorial optimization problem which is identical to the considered one.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51090760","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
A new method using two triacs for control of single‐phase induction motor 提出了一种采用双晶闸管控制单相感应电动机的新方法
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060613
M. A. Abdel-halim, I. Kamal
{"title":"A new method using two triacs for control of single‐phase induction motor","authors":"M. A. Abdel-halim, I. Kamal","doi":"10.1002/ETEP.4450060613","DOIUrl":"https://doi.org/10.1002/ETEP.4450060613","url":null,"abstract":"Among the conventional methods there is no one method by which single-phase induction motors can be started, speed-controlled and reversed. The paper develops a new method for controlling single-phase induction motors with two symmetrical stator windings by placing two bidirectional solid-state switches (triacs), one in series with the main winding and the other with the auxiliary winding. Such a connection will perform all the required jobs namely: starting, speed control and reversing the direction of rotation. A motor representation in the d, q, 0 reference frame is presented. A state-space mathematical model has been developed to describe the system taking care ofthe discontinuities introduced by the triacs. Computer results for transient and steady-state conditions are presented. Also, experimental verification has been done.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060613","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51091558","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
Improving the economic competitiveness of small‐load long‐distance AC transmission systems by the use of static compensators at the receiving end 通过在接收端使用静态补偿器来提高小负载远距离交流输电系统的经济竞争力
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060403
M. Ceraolo
{"title":"Improving the economic competitiveness of small‐load long‐distance AC transmission systems by the use of static compensators at the receiving end","authors":"M. Ceraolo","doi":"10.1002/ETEP.4450060403","DOIUrl":"https://doi.org/10.1002/ETEP.4450060403","url":null,"abstract":"To supply small loads located very far from low-cost generation areas local Diesel generation or transmission from the generation areas to loads are the alternatives to be considered. The competitiveness of the latter solution can be improved by the use of static devices, able to compensate active and/or reactive powers, installed in suitable locations of the transmission system. In this paper the possibility of installing at the Receiving End either a Static Var Compensator (SVC) or a Static Watt-Var Compensator (SWVC, that is a device able to work in the four quadrants of the P-Q plane) is discussed. A possible operating strategy is proposed for both devices, the loadability limits of various options are determined, and an economical comparison of the schemes without compensators and with SVC or SWVC is also carried out in a practical case of application.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060403","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51089659","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
Analysis of high‐frequency PWM techniques suitable for resonant inverters 适用于谐振式逆变器的高频PWM技术分析
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060307
D. Neacşu, D. Alexa
{"title":"Analysis of high‐frequency PWM techniques suitable for resonant inverters","authors":"D. Neacşu, D. Alexa","doi":"10.1002/ETEP.4450060307","DOIUrl":"https://doi.org/10.1002/ETEP.4450060307","url":null,"abstract":"Special Pulse-Width-Modulation (PWM) techniques capable of realizing true PWM operation of quasi-resonant DC-link inverters are presented. These techniques provide an increased value of the lowest switching time for higher carrier frequencies. The harmonic performances are extensively studied by simulation in comparison with conventional Space- Vector Modulation and a simple algorithm for real-time implementation is developed.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060307","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51089895","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
Calculating a new reference point for the iec‐flickermeter 为iec‐闪变计计算一个新的参考点
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450080604
W. Mombauer
{"title":"Calculating a new reference point for the iec‐flickermeter","authors":"W. Mombauer","doi":"10.1002/ETEP.4450080604","DOIUrl":"https://doi.org/10.1002/ETEP.4450080604","url":null,"abstract":"Modern multicycle-controlled equipment produce voltage fluctuations with repetition rates much higher than the highest frequency for type testing the IEC flickermeter under the standard IEC 61000-4-15. In order to equalize all flickermeters it is necessary to add an additional reference point for 33'/? Hz to the standard. The amount of d/%-values will be evaluated. Reference values for 120- V/60-Hz- and 230- V/60-Hz systems have been added.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450080604","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51098045","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: 19
Robust control of switched power converters via sliding mode 基于滑模的开关电源变换器鲁棒控制
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060611
B. Nicolas, M. Fadel, Y. Chéron
{"title":"Robust control of switched power converters via sliding mode","authors":"B. Nicolas, M. Fadel, Y. Chéron","doi":"10.1002/ETEP.4450060611","DOIUrl":"https://doi.org/10.1002/ETEP.4450060611","url":null,"abstract":"This paper presents a variable structure control approach for the output voltage regulation of switched power converters. The most outstanding feature of this control technique is its robustness towards load and line voltage disturbances. A control implementation for a basic down converter based on state-space transformation wholly confirms this performance. An extension to inverter control results in reduced harmonic distortion in case of uncertain load characteristics. Analytical predictions are verified by experimental results.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060611","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51090922","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
Some possible new applications of a Partial-Discharge (PD) model and its relation to PD-detection sensitivity 局部放电模型的一些可能的新应用及其与局部放电检测灵敏度的关系
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450060616
M. Danikas
{"title":"Some possible new applications of a Partial-Discharge (PD) model and its relation to PD-detection sensitivity","authors":"M. Danikas","doi":"10.1002/ETEP.4450060616","DOIUrl":"https://doi.org/10.1002/ETEP.4450060616","url":null,"abstract":"In this paper some possibilities of further applications of a known Streamer Partial-Discharge Model are proposed. These possibilities refer to the relation between the observed partial-discharge (PD) magnitude and the applied field to the insulation. Furthermore, the model is a useful tool to investigate the sensitivity of a PD detector and also to compare the sensitivities between various PD detectors.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450060616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51091297","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
Calculation of current flow in grounding systems of substations and of HV line towers, in line shield wires and cable sheaths during earth faults 接地故障时变电站接地系统、高压线路塔、线路屏蔽线和电缆护套内电流的计算
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450080202
F. Gatta, F. Iliceto
{"title":"Calculation of current flow in grounding systems of substations and of HV line towers, in line shield wires and cable sheaths during earth faults","authors":"F. Gatta, F. Iliceto","doi":"10.1002/ETEP.4450080202","DOIUrl":"https://doi.org/10.1002/ETEP.4450080202","url":null,"abstract":"The paper presents a method and a numerical calculation program of the repartition of the earth-fault currents in the grounding systems of substations and of the HV line towers, as well as of the currents which flow in the shield wires of the overhead lines and/or in the sheaths and armourings of underground cahles. The program may be applied also to very extended networks for single-phase-to-ground (1-Φ-to-Gr) and phase-to-phase-to-ground (Φ-Φ-to-Gr) faults at any point. The program is based on the simulations of the earth resistances of the HV line towers by means of a transversal conductance uniformly distributed between the shield wires and earth, and which is assumed to be variable from stretch to stretch according to soil resistivity. Models are derived which are aimed at simulating the single and double-circuit overhead lines provided with shield wires, as well as the underground cables. These models consist in a single three-pole or four-pole equivalent circuit. The validity of the program is verified by comparison with the calculations carried out by the Electromagnetic Transients Program (EMTP). Mention is made of a study carried out for the Turkish 420/150-kV network. Some measures presented are aimed at reducing the currents which flow in the shield wires of the lines outgoing from the power plants/substations following faults nearby.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450080202","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51094829","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
On the realizability of balanced untransposed overhead line configurations 平衡非转置架空线配置的可实现性
European Transactions on Electrical Power Pub Date : 2007-09-07 DOI: 10.1002/ETEP.4450080607
J. Faria
{"title":"On the realizability of balanced untransposed overhead line configurations","authors":"J. Faria","doi":"10.1002/ETEP.4450080607","DOIUrl":"https://doi.org/10.1002/ETEP.4450080607","url":null,"abstract":"A procedure for synthesizing balanced untransposed overhead three-phase line configurations has been recently presented. Howeve r, such a procedure is based on the simplifying assumption that the soil influence can be described by an impedance matrix with all elements equal. In the present paper we abandon that assumption and model the earth effect via the Dubanton 's approach. In the frame of this more accurate model we show that the realizability of such untransposed balanced line configurations cannot indeed be assured, not even in the low-frequency and high-frequency limiting cases.","PeriodicalId":50474,"journal":{"name":"European Transactions on Electrical Power","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ETEP.4450080607","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51098847","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
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