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Performance of HVDC Converters in Enhancing Transient Stability of Power Systems and in the Torsional Stressing of Generator Shafts Due to Balanced and Unbalanced Operation of the Rectifier 高压直流变流器在提高电力系统暂态稳定性方面的性能，以及由于整流器的平衡和不平衡运行而引起的发电机轴扭应力
Electric Machines and Power Systems Pub Date : 1999-09-01 DOI: 10.1080/073135699268759
T. Hammons, H. Tang, S. Ehrhard
{"title":"Performance of HVDC Converters in Enhancing Transient Stability of Power Systems and in the Torsional Stressing of Generator Shafts Due to Balanced and Unbalanced Operation of the Rectifier","authors":"T. Hammons, H. Tang, S. Ehrhard","doi":"10.1080/073135699268759","DOIUrl":"https://doi.org/10.1080/073135699268759","url":null,"abstract":"This paper examines performance of HVDC converters with respect to real and reactive power at the inverter or rectifier following a command for power injected into or taken from the AC system to enhance power system stability. It also considers the effect balanced and unbalanced operation of inverters in asynchronous links has on torsional stressing of large turbine-generator shafts. First a 6-pulse bridge is modeledto determine characteristics for reactive power at both the inverter and rectifier as a function of AC power at the inverter or rectifier. Responses for real and reactive power following transient commands for AC real power are determined for a range of commands for real power to enhance transient performance of the power system. The characteristics relate to a link with typical parameters rated at 200 MW ~ 1000 MW. Performance of a 12-pulse bridge configuration that was modeled is then summarized. Noncharacteristic harmonic currents injected by the inverter into the AC system due to balanced ...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131572295","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 Logic Based Successive LP Method for Reactive Power Optimization 基于模糊逻辑的逐次LP无功优化方法
Electric Machines and Power Systems Pub Date : 1999-09-01 DOI: 10.1080/073135699268777
B. Venkatesh, G. Sadasivam, M. A. Khan
{"title":"Fuzzy Logic Based Successive LP Method for Reactive Power Optimization","authors":"B. Venkatesh, G. Sadasivam, M. A. Khan","doi":"10.1080/073135699268777","DOIUrl":"https://doi.org/10.1080/073135699268777","url":null,"abstract":"This paper presents a new Successive Fuzzy Linear Programming (SFLP) method for Reactive Power Optimization (RPO) to minimize the transmission loss and improve the voltage profile. The SFLP method uses Fuzzy LP (FLP) model in the Successive Linear Programming (SLP) framework to solve the RPO problem. In the FLP model, the objective and each of the constraints are assigned a satisfaction parameter. The satisfaction parameter corresponding to the objective quantifies the degree of closeness of the objective in the current state to the optimum. The satisfaction parameter corresponding to a constraint describes the degree of enforcement of that constraint. By maximizing the minimum of these satisfaction parameters, the objective as well as the constraint enforcements are maximized. The SFLP method of RPO is efficient and reliable in scheduling systems having severe under-voltages and insufficient reactive power, as the method is capable of maximizing the enforcement of the violated load bus voltage constraint...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128867222","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: 14
Harmonic Analysis and Loss Comparison of Microcomputer-Based PWM Strategies for Induction Motor Drive 基于微机的异步电机驱动PWM策略的谐波分析与损耗比较
Electric Machines and Power Systems Pub Date : 1999-09-01 DOI: 10.1080/073135699268768
Jagdeep Singh
{"title":"Harmonic Analysis and Loss Comparison of Microcomputer-Based PWM Strategies for Induction Motor Drive","authors":"Jagdeep Singh","doi":"10.1080/073135699268768","DOIUrl":"https://doi.org/10.1080/073135699268768","url":null,"abstract":"The results presented in this paper were specially chosen to provide a comparative basis for assessing the performance of induction motor drive operating on PWM strategies that have been suitably m...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126307672","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
Russia/Germany HVDC link : Analysis of system scaling factors for evaluating torsional stressing of generators on the Polish Grid System 俄罗斯/德国高压直流线路:波兰电网发电机扭转应力评估的系统比例因子分析
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268821
T. Hammons, G. Sim, P. Kacejko
{"title":"Russia/Germany HVDC link : Analysis of system scaling factors for evaluating torsional stressing of generators on the Polish Grid System","authors":"T. Hammons, G. Sim, P. Kacejko","doi":"10.1080/073135699268821","DOIUrl":"https://doi.org/10.1080/073135699268821","url":null,"abstract":"This paper examines phenomena relating to the effect HVdc link ripple current superimposed on the direct current of an asynchronous link has on torsional stressing of steam turbine-generator-exciter shafts of generators in Poland in close proximity to a proposed 1GW HVdc inverter station. It makes an indepth analysis of dispersion of noncharacteristic harmonic alternating currents, which are injected into the Polish Grid Network by the inverter due to HVdc link ripple current in an asynchronous link. It also investigates the magnitude of ripple current at the inverter due to unbalanced bridge operation (as well as for balanced bridge operation) not analyzed in depth in the literature heretofore.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123561416","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
A New Flux-Based Harmonic Elimination Technique 一种新的基于磁通的谐波消除技术
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268803
M. Bettayeb, U. Qidwai
{"title":"A New Flux-Based Harmonic Elimination Technique","authors":"M. Bettayeb, U. Qidwai","doi":"10.1080/073135699268803","DOIUrl":"https://doi.org/10.1080/073135699268803","url":null,"abstract":"With the growing concern over harmonics and their effects due to the increasing use of solid state switching devices in modern power systems, there is an increasing interest in developing new and more efficient harmonic elimination schemes. This paper presents a new scheme to mitigate the harmonics present in the system. The method uses the flux cancellation and injection capabilities of transformers, along with the existing filter designs, to produce an improved performance for elimination of unwanted harmonics and noise. The robustness to time varying signals, noncharacteristic harmonics, and high-power noise makes this method highly competitive. The performance of the proposed scheme is confirmed both by simulation on real power system harmonic data and laboratory scale experimentation.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129848306","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
Compensation of Parameter Variation Effects in Sensorless Indirect Vector Controlled Induction Machines Using Model-Based Approach 基于模型的无传感器间接矢量控制感应电机参数变化效应补偿
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268830
M. Wang, E. Levi, M. Jovanović
{"title":"Compensation of Parameter Variation Effects in Sensorless Indirect Vector Controlled Induction Machines Using Model-Based Approach","authors":"M. Wang, E. Levi, M. Jovanović","doi":"10.1080/073135699268830","DOIUrl":"https://doi.org/10.1080/073135699268830","url":null,"abstract":"The majority of speed estimation schemes for sensorless vector control of induction machines use a mathematical model of the machine in the estimation process. These schemes are therefore inherently sensitive to parameter variation effects in the machine. The variety of speed estimation methods makes any attempt to develop a universal approach to compensation of parameter variation effects impossible. This paper concentrates on one of the most frequently used schemes, in which speed is estimated using model reference adaptive control approach (MRAC) on the basis of two estimated values of the rotor flux space vector. The estimator is analyzed in conjunction with indirect feed-forward rotor flux-oriented induction machine. An attempt is made to improve the accuracy of the speed estimation by appropriate modification of the speed estimator and the indirect vector controller structures using modified induction motor models that account for one or more of the phenomena that are neglected in development of the...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130879174","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 Comparison of Distribution System Reliability Indices for Different Operating Configurations 不同运行配置下配电系统可靠性指标的比较
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268849
L. Goel
{"title":"A Comparison of Distribution System Reliability Indices for Different Operating Configurations","authors":"L. Goel","doi":"10.1080/073135699268849","DOIUrl":"https://doi.org/10.1080/073135699268849","url":null,"abstract":"Various schemes of distribution systems, such as radial, ring, flower, etc., exist in practice, and one can establish the degree of reliability at which a particular configuration serves its customers only by performing a quantitative reliability performance assessment of the different configurations. The study results expressed in terms of reliability indices can serve as a basis of comparison of the reliabilities of two or more configurations. More importantly, the reliability indices of new or proposed systems can be predicted using realistic data, which in turn can be used to make judicious decisions between alternative schemes. This paper describes the application of Windows-based user-friendly software to evaluate the reliability of different types of distribution system configurations, in particular, three types of connections, viz., radial, meshed or ring, and flower networks. A comparison is made between the reliability indices of these three types of configurations, and conclusions are drawn.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133205478","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: 15
The Design of Low Vibration Doubly Salient Motors 低振动双凸极电机的设计
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268812
A. Stassis, A. Michaelides
{"title":"The Design of Low Vibration Doubly Salient Motors","authors":"A. Stassis, A. Michaelides","doi":"10.1080/073135699268812","DOIUrl":"https://doi.org/10.1080/073135699268812","url":null,"abstract":"Structural Finite Element Analysis is used to investigate potential improvements in the design of low vibration, doubly salient switched reluctance motors (SRMs). The natural modes of vibration of a 4-pole round-stator are examined. The dynamic response of the machine stator when electromagnetic forces are applied at the stator poles is fully examined in this paper. The 4-pole, roundstator SRM is compared with a common square-stator motor as well as a novel square-stator structure, in which the poles are positioned at the square corners. Other machine design cues aimed at reducing vibration, such as the addition of pole fillets and the choice of suitable back iron width, are investigated.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126845844","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: 3
Speed Sensorless Vector Control of Induction Motor as Influenced by Core-Loss 磁芯损耗影响下感应电机无速度传感器矢量控制
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268786
S. Abou-Shadi, M. Abdel-Salam, Y. Sayed
{"title":"Speed Sensorless Vector Control of Induction Motor as Influenced by Core-Loss","authors":"S. Abou-Shadi, M. Abdel-Salam, Y. Sayed","doi":"10.1080/073135699268786","DOIUrl":"https://doi.org/10.1080/073135699268786","url":null,"abstract":"This paper is aimed at developing a method of speed sensorless vector-control of induction motor drive systems, taking into consideration stator and rotor core losses. To validate the correctness of the method, the calculated motor speed, rotor flux, and stator current are compared with those measured in the literature. Moreover, the present calculated values in the presence of core losses are also compared with those calculated before in absence of the core losses. It is concluded that consideration of core losses in the dynamic model of the machine improves the theoretical predictions and reduces the discrepancies between the calculated and measured values.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130895872","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
Transient Analysis of Self-Excited Induction Generator Supplying Dynamic Load 自激感应发电机提供动态负载的暂态分析
Electric Machines and Power Systems Pub Date : 1999-08-01 DOI: 10.1080/073135699268795
Bhim Singh, L. Shridhar, C. Jha
{"title":"Transient Analysis of Self-Excited Induction Generator Supplying Dynamic Load","authors":"Bhim Singh, L. Shridhar, C. Jha","doi":"10.1080/073135699268795","DOIUrl":"https://doi.org/10.1080/073135699268795","url":null,"abstract":"This paper deals with the transient analysis of the Self-Excited Induction Generator (SEIG) feeding an induction motor (IM) load. Here, transient performance of the SEIG-IM system has been investigated to assess suitability of the SEIG to sudden switchings, such as starting of the IM. To predict the response of the system, quasi-stationary d-q axes model of the polyphase induction machine has been used. Transient response of the system has been presented for different operating conditions, and sample experimental results are given to validate the predicted ones. Useful guidelines for the design and operation of an SEIG-IM system for an isolated application, such as an IM-driven irrigation pump, have been suggested.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128009163","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: 28
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