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The Effectiveness Function to Select Robust and Non-negatively Interactive Installing Locations and Feedback Signals of FACTS-based Stabilizers 基于facts的稳定器鲁棒非负交互安装位置和反馈信号选择的有效性函数
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268597
Haifeng F. Wang
{"title":"The Effectiveness Function to Select Robust and Non-negatively Interactive Installing Locations and Feedback Signals of FACTS-based Stabilizers","authors":"Haifeng F. Wang","doi":"10.1080/073135699268597","DOIUrl":"https://doi.org/10.1080/073135699268597","url":null,"abstract":"In this paper, an effectiveness function is proposed for the selection of installing location and feedback signal of a FACTS-based stabilizer by taking account of not only its effectiveness, but also the robustness and non-negative interactions with other stabilizers. An example three-machine power system is presented in the paper to demonstrate the application of the effectiveness function proposed, where the installing location and feedback signal of a TCSC-based stabilizer is selected that not only is effective and robust, but also imposes a non-negative interaction on a PSS installed in the power system.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121576490","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 Digital Estimation Algorithm for Impedance Measurements 阻抗测量的数字估计算法
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268579
S. Soliman, M. El-Hawary
{"title":"A Digital Estimation Algorithm for Impedance Measurements","authors":"S. Soliman, M. El-Hawary","doi":"10.1080/073135699268579","DOIUrl":"https://doi.org/10.1080/073135699268579","url":null,"abstract":"This paper presents a new digital algorithm for measuring an unknown impedance. The proposed algorithm is based on the minimization of the least absolute value of the error. The algorithm developed in [5] is used to solve the resulting optimization problem. The proposed algorithm is general enough to implement for measuring impedance. The effects of critical parameters on the accuracy of the measured unknown impedance are discussed. Results from simulated data are given to form our conclusions.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556241","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
Measurement of Voltage Flicker Magnitude and Frequency in a Power System For Power Quality Analysis 用于电能质量分析的电力系统电压闪变幅度和频率测量
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268588
S. Soliman, M. El-Hawary
{"title":"Measurement of Voltage Flicker Magnitude and Frequency in a Power System For Power Quality Analysis","authors":"S. Soliman, M. El-Hawary","doi":"10.1080/073135699268588","DOIUrl":"https://doi.org/10.1080/073135699268588","url":null,"abstract":"One must be able to accurately measure voltage flicker levels and its frequency. This paper introduces a new application of the least error squares (LES) state estimation algorithm to measure voltage flicker and its frequency. We use a linear model of the flicker voltage magnitude, its phase angle and frequency deviation, and the system voltage magnitude and its phase angle. The proposed algorithm uses digitized samples of the voltage signal. Effects of data size, sampling frequency, and number of samples on the estimated parameters are studied.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114122369","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
Calculation of Transmission Line Parameters From Synchronized Measurements 从同步测量计算输电线路参数
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268560
R. Wilson, G. Zevenbergen, D. Mah, A. J. Murphy
{"title":"Calculation of Transmission Line Parameters From Synchronized Measurements","authors":"R. Wilson, G. Zevenbergen, D. Mah, A. J. Murphy","doi":"10.1080/073135699268560","DOIUrl":"https://doi.org/10.1080/073135699268560","url":null,"abstract":"Accurate knowledge of transmission system parameters, such as series impedance, optimizes distance relay settings and impedance-based fault location. A new method is developed to measure transmission line impedances and admittances from synchronized phasor measurements. Power system voltage and current phasors were recorded during commissioning tests of a 525 kV transmission system containing shunt and series compensation. Steady-state phase angles (delta) and magnitudes of line-side voltages and currents were measured relative to a satellite-based global time standard at two substations. Pairs of synchronized measurements were used to directly calculate real-time steadystate ABCD parameters. For comparison, two-port ABCD transmission system parameters were derived by classical methods and from an ElectroMagnetics Transients Program (EMTP) transmission system design model. To verify the accuracy of the measured parameters, a new method comparing field measured with calculated power flows was developed. Se...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134071214","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: 59
Neural Network-Based Faulty Line Identification in Power Distribution Systems 基于神经网络的配电系统故障线路识别
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268623
Zhiqiang Liu, O. Malik
{"title":"Neural Network-Based Faulty Line Identification in Power Distribution Systems","authors":"Zhiqiang Liu, O. Malik","doi":"10.1080/073135699268623","DOIUrl":"https://doi.org/10.1080/073135699268623","url":null,"abstract":"Artificial neural networks (ANNs) have large input-error tolerance ranges and can be used as classifiers. Utilizing this property, a neural network-based detector, which identifies the faulty line directly by taking current and voltage patterns as feature vectors, has been designed. The quality of classification is not dependent on the transmission model, but rather on the net topology, training set, and the choice of learning law. A feed-forward multilayer perceptron, using the Back-Propagation Learning Algorithm, has been used to realize an optimal classifier. The classification quality, by simulating certain faults on the lines, has demonstrated the capability of the proposed approach for distribution power system protection.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127107679","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
Harmonics Reduction in DSC Induction Motors with Two Three-Phase Stator Winding Sets 两组三相定子绕组的DSC感应电动机谐波降低
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268551
O. Bruno, A. Landi, L. Sani
{"title":"Harmonics Reduction in DSC Induction Motors with Two Three-Phase Stator Winding Sets","authors":"O. Bruno, A. Landi, L. Sani","doi":"10.1080/073135699268551","DOIUrl":"https://doi.org/10.1080/073135699268551","url":null,"abstract":"A direct self control (DSC) strategy is applied to an induction motor with two three-phase stator winding sets. A remarkable reduction in the electromagnetic torque harmonics, as well as a meaningful minimization of the machine current distortion, are evidenced with respect to a conventional induction motor. In traction applications, electromagnetic torque harmonics induce mechanical stress on the transmission apparatus and cause resonance phenomena. On the other hand, current harmonics interact with signaling transmission, deteriorating their quality. Both drawbacks are greatly reduced in the case of the DSC strategy applied to the proposed unconventional motor. Therefore, the presented results are relevant in electrical traction, showing that the introduction of induction motors with two three-phase stator winding sets offers new interesting solutions.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121535817","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
Stability Assessment of Saturated Salient Pole Alternator Incorporating Power System Stabilizer 含电力系统稳定器的饱和凸极交流发电机稳定性评估
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268605
M. Abdel-halim, A. Al-Ohaly
{"title":"Stability Assessment of Saturated Salient Pole Alternator Incorporating Power System Stabilizer","authors":"M. Abdel-halim, A. Al-Ohaly","doi":"10.1080/073135699268605","DOIUrl":"https://doi.org/10.1080/073135699268605","url":null,"abstract":"This paper presents an accurate method for the calculation of the damping and synchronizing torques of a saturated salient-pole alternator. The effects of both the automatic voltage regulator (AVR) and the power system stabilizers (PSS) are incorporated. The saturation is represented accurately using static and dynamic saturated inductances. The alternator is modelled accurately by a detailed equivalent circuit which represents properly the saturation effects under the dynamic conditions. Based on this circuit, the damping and synchronizing torque coefficients have been calculated by a least square algorithm. The effects of both the AVR and the PSS on the torque components are studied over a wide range of operating conditions. With the aid of the thermal and mechanical constraints and the limits imposed by the alternator dynamic stability on the operating conditions, a capability diagram of the alternator has been developed.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134050692","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
Wavelet Analysis of Power Systems Transients Using Scalograms and Multiresolution Analysis 基于尺度图和多分辨率分析的电力系统暂态小波分析
Electric Machines and Power Systems Pub Date : 1999-11-01 DOI: 10.1080/073135699268614
J. Liu, P. Pillay, P. Ribeiro
{"title":"Wavelet Analysis of Power Systems Transients Using Scalograms and Multiresolution Analysis","authors":"J. Liu, P. Pillay, P. Ribeiro","doi":"10.1080/073135699268614","DOIUrl":"https://doi.org/10.1080/073135699268614","url":null,"abstract":"The Wavelet Transform has attracted considerable attention in the field of power quality analysis recently. It has provedto be a powerful tool to study those transients that have time-localized information. In this paper, the insight to be gained from using multiresolution analysis and scalograms is presented. With multiresolution analysis, the original signal is transformed into coefficients in different octave levels. From the scalogram of the respective coefficients at each level, the special features of the original signals become distinctive. Advantages of the wavelet transform over the Fourier transform are also presented. Typical power transients are used to test the method to illustrate its applicability in the analysis of power transients.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130849413","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: 17
Fuzzy Distribution Load Flow 模糊分配潮流
Electric Machines and Power Systems Pub Date : 1999-10-01 DOI: 10.1080/073135699268678
D. Das, Smarajit Ghosh, D. Srinivas
{"title":"Fuzzy Distribution Load Flow","authors":"D. Das, Smarajit Ghosh, D. Srinivas","doi":"10.1080/073135699268678","DOIUrl":"https://doi.org/10.1080/073135699268678","url":null,"abstract":"In this paper, a fuzzy model for distribution system operation is presented. Uncertainties in loads are modeled as fuzzy numbers. A voltage stability index for each node of radial distribution networks is also proposed. The conditions for voltage collapse to occur are easily derived from this voltage stability index. Among the results, one obtains possibility distributions for substation current, voltage stability index, real and reactive power losses, etc. A general discussion on the results, along with the advantages and disadvantages of the approach, is presented.","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132621070","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
Accurate Tracking Control of a Limited Angle Torque Motor 有限角转矩电机的精确跟踪控制
Electric Machines and Power Systems Pub Date : 1999-10-01 DOI: 10.1080/073135699268650
Y. Zhang, I. Smith, J. Kettleborough
{"title":"Accurate Tracking Control of a Limited Angle Torque Motor","authors":"Y. Zhang, I. Smith, J. Kettleborough","doi":"10.1080/073135699268650","DOIUrl":"https://doi.org/10.1080/073135699268650","url":null,"abstract":"This paper presents a novel control scheme that was developed and implemented to provide accurate tracking control of a limited angle torque motor following a 50 Hz sawtooth reference waveform. The approach could be extended to other limited motion actuators which require high tracking accuracy, but are subject to a single dominant nonlinear element, such as magnetic stiffness, which may be defined experimentally. One example is the variable reluctance linear actuator, used in the aerospace industry for control of aerodynamic surfaces. Despite the significant nonlinearities inherent in the torque motor, a complex nonlinear controller can be designed using simple linear design techniques, and it is demonstrated that the motor is then able to track the reference signal with a very high accuracy. The hybrid scheme uses a multicompensator, multiloop linear controller to reshape substantially the motor response characteristics, which have both inherent time-lag and oscillatory dynamics and an additional nonlin...","PeriodicalId":262115,"journal":{"name":"Electric Machines and Power Systems","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129028248","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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