Estimation of Hydropower Synchronous Generator Parameters Through Field Simulations of Modified Standard Tests
- PDF / 1,099,602 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 97 Downloads / 179 Views
ORIGINAL ARTICLE
Estimation of Hydropower Synchronous Generator Parameters Through Field Simulations of Modified Standard Tests Marwa Ben Slimene1,2 · Abdelaziz Salah Saidi3 · Mohamed Arbi Khlifi4 Received: 8 April 2019 / Revised: 14 February 2020 / Accepted: 5 October 2020 © The Korean Institute of Electrical Engineers 2020
Abstract The present paper deals with a simple but sufficiently accurate method for constant parameter identification of synchronous machine standard circuit model. The method is mainly based on classical tests at the line frequency as for induction machines. The proposed identification process is organized in a sequence beginning by a correct evaluation of the field to armature turns ratio, whereby the rest of invariant parameters are estimated from standstill tests. Simulations and experiments of synchronous machine transients, in normal and faulty operations, were carried out to prove the validity of the method. Keywords Parameter identification · Standard model · Standstill tests at line frequency · Synchronous machines
1 Introduction Sufficiently accurate methods for parameter identification of ac machines, using simple tests and procedures, are very useful to the industry. Even if initially furnished, machine parameters can deviate substantially from manufacturer values with time and use and must be updated. Also, parameter determination with acceptable accuracy is a need for the analysis of these machines. Regarding synchronous machines, many papers have been published on modeling and parameter estimation. The main and widely accepted experimental and theoretical methods are respectively based on frequency response tests [1, 2] and finite element computations [3, 4]. This doesn’t neglect many other interesting contributions [5, 6].
* Mohamed Arbi Khlifi [email protected] 1
Department of Computer Engineering, College of Computer Science and Engineering, University of Ha’il, Ha’il, Saudi Arabia
2
Research Laboratory SIME, ENSIT, University of Tunis, Tunis, Tunisia
3
Department of Electrical Engineering, King Khalid University, Abha, Saudi Arabia
4
Department of Electrical Engineering, Faculty of Engineering, Islamic University of Madinah, Madinah, Saudi Arabia
Frequency response tests, either standstill or on-line, deliver data in the frequency domain than the time domain. They are small signal tests applied to power devices. In any case, the machine is not feeded from the industrial grid but with a variable frequency line. Theoretical methods, especially finite element ones, require the exact internal geometrical dimensions of the machine and very specific and costly software. If both requirements are not available, as it is often the case, the finite element method is not possible to apply. The present contribution exposes a direct approach for parameter evaluation of salient or non-salient pole synchronous machines. The method concerns the popular and the most used standard model of Fig. 1 [7–10]. All parameters presented in the equivalent circuit has been d
Data Loading...
