Cross-Identification of Synchronous Generator Parameters From RTDR Test Time-Domain Analytical Responses

2011 ◽  
Vol 26 (3) ◽  
pp. 776-786 ◽  
Author(s):  
René Wamkeue ◽  
Christian Jolette ◽  
Augustin B. Mpanda Mabwe ◽  
Innocent Kamwa
Keyword(s):  
Time Domain ◽  
Synchronous Generator ◽  
Test Time

scholarly journals Time-Domain Data Fusion Using Weighted Evidence and Dempster–Shafer Combination Rule: Application in Object Classification

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5187 ◽  
Author(s):  
Md Nazmuzzaman Khan ◽  
Sohel Anwar
Keyword(s):  
Data Fusion ◽  
Time Domain ◽  
Confusion Matrix ◽  
Object Classification ◽  
Real Data ◽  
Tuning Parameter ◽  
Test Time ◽  
Combination Rule ◽  
Time Domain Data ◽  
Step Algorithm

To apply data fusion in time-domain based on Dempster–Shafer (DS) combination rule, an 8-step algorithm with novel entropy function is proposed. The 8-step algorithm is applied to time-domain to achieve the sequential combination of time-domain data. Simulation results showed that this method is successful in capturing the changes (dynamic behavior) in time-domain object classification. This method also showed better anti-disturbing ability and transition property compared to other methods available in the literature. As an example, a convolution neural network (CNN) is trained to classify three different types of weeds. Precision and recall from confusion matrix of the CNN are used to update basic probability assignment (BPA) which captures the classification uncertainty. Real data of classified weeds from a single sensor is used test time-domain data fusion. The proposed method is successful in filtering noise (reduce sudden changes—smoother curves) and fusing conflicting information from the video feed. Performance of the algorithm can be adjusted between robustness and fast-response using a tuning parameter which is number of time-steps( t s ).

scholarly journals Power System Stabilizer Tuning Algorithm in a Multimachine System Based on S-Domain and Time Domain System Performance Measures

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5644
Author(s):  
Predrag Marić ◽  
Ružica Kljajić ◽  
Harold R. Chamorro ◽  
Hrvoje Glavaš
Keyword(s):  
Power Systems ◽  
Power System ◽  
Time Domain ◽  
Synchronous Generator ◽  
Pole Placement ◽  
Power System Stabilizer ◽  
Weight Functions ◽  
Novel Approach ◽  
The Time Domain ◽  
System Stabilizer

One of the main characteristics of power systems is keeping voltages within given limits, done by implementing fast automatic voltage regulators (AVR), which can raise generator voltage (i.e., excitation voltage) in a short time to ceiling voltage limits while simultaneously affecting the damping component of the synchronous generator electromagnetic torque. The efficient way to increase damping in the power system is to implement a power system stabilizer (PSS) in the excitation circuit of the synchronous generator. This paper proposes an enhanced algorithm for PSS tuning in the multimachine system. The algorithm is based on the analysis of system participation factors and the pole placement method while respecting the time domain behavior of the system after being subdued with a small disturbance. The observed time-domain outputs, namely active power, speed, and rotor angle of the synchronous generator, have been classified and validated with proposed weight functions based on the minimal square deviation between the initial values in a steady-state and all sampled values during the transitional process. The system weight function proposed in this algorithm comprises s-domain and time-domain indices and represents a novel approach for PSS tuning. The proposed algorithm performance is validated on IEEE 14-bus system with a detailed presentation of the results in a graphical and table form.

Analysis of faults in active distribution network with and without synchronous generator using instantaneous symmetrical components in time domain

2018 ◽  
Vol 100 (3) ◽  
pp. 2117-2127 ◽  
Author(s):  
Vladica Mijailović ◽  
Dragan Ćetenović ◽  
Aleksandar Ranković ◽  
Predrag Petrović ◽  
Dimitrije Rozgić
Keyword(s):  
Time Domain ◽  
Distribution Network ◽  
Synchronous Generator ◽  
Active Distribution Network ◽  
Symmetrical Components

scholarly journals Development of a Synchronous-Generator Experimental Bench for

2011 ◽  
Vol 9 (02) ◽  
Author(s):  
M.A. Arjona ◽  
M. Cisneros Gonzalez ◽  
C. Hernandez
Keyword(s):  
Experimental Data ◽  
Time Domain ◽  
Test Bench ◽  
System Development ◽  
Synchronous Generator ◽  
Synchronous Machines ◽  
Synchronous Motors ◽  
Testing Environment ◽  
Research And Teaching ◽  
Experimental Bench

This paper presents the development of an experimental bench for performing time-domain tests on synchronousmachines at standstill. The test bench allows the collection of experimental data which can then be used in theparameter estimation of mathematical models of synchronous motors and generators. The system development isbased on the LabVIEW programming language. It effortlessly allows the calibration of voltage and current sensors, thed-q magnetic axis positioning of the synchronous generator, and the spectral analysis from the collected data. In addition, the testing environment includes non-sophisticated instrumentation elements and a power amplifier. Thisexperimental bench has a friendly user interface which guides the user throughout a defined methodology to allow theachievement of the different time domain tests on synchronous machines. A 7kVA, 220V, 60Hz synchronousgenerator was used to show the functionality and usefulness of the test bench in research and teaching electricalmachine theory

scholarly journals Identification of Synchronous Generator Transfer Functions From Standstill Test Data

2002 ◽  
Author(s):  
David-P. Molenaar ◽  
O. H. Bosgra ◽  
M. J. Hoeijmakers
Keyword(s):  
Time Domain ◽  
Transfer Functions ◽  
Frequency Converter ◽  
Dynamic Performance ◽  
Synchronous Generator ◽  
Direct Drive ◽  
Model Estimate ◽  
Time Domain Data ◽  
Consistent Model ◽  
High Dynamic

The design of a robust frequency converter controller for high dynamic performance of a synchronous generator requires an accurate dynamic model of the electromagnetic part. In this paper a new procedure for identifying the transfer functions of Park’s dq-axis model of a synchronous generator has been developed. It will be shown that the parameters of this model can be easily identified from standstill time-domain data. The validity of the theoretical model has been verified by comparing time-domain simulations with measurements taken from the Lagerwey LW-50/750 direct-drive synchronous generator. It can be concluded that a consistent model estimate of the electromagnetic part of the LW-50/750 generator has been obtained. Ultimate validation, however, will follow after the implementation of the designed frequency converter controller in this wind turbine.

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