عنوان مقاله
روش بنیادین جهت تعیین پارامترهای مدار سیم پیچی میدان و سیم پیچ میراگر ماشین سنکرون
فهرست مطالب
چکیده
مقدمه
روش پیشنهادی و مشتقات آن برای تعیین پارامترهای مدار میدان و میراگر
نتایج آزمایشها
نتیجه گیری
بخشی از مقاله
همسو کردن فاز a با محور d، توسط تحریک سیم پیچی میدان و سیم پیچی فاز a با جریان DC کنترل شده با پلاریته های مناسب که گشتاور کافی برای چرخاندن یا قفل شدن را تولید می کند، انجام می شود. همسو کردن فاز a با محور q توسط تحریک کردن سیم پیچی میدان، فاز b و فاز c با پلاریته های مناسب، انجام می شود.
کلمات کلیدی:
A Novel and Fundamental Approach towards Field and Damper Circuit Parameter Determination of Synchronous Machine Kaushik Mukherjee Member, IEEE University of Windsor kmukh@uwindsor.ca Lakshmi Varaha Iyer Student Member, IEEE University of Windsor iyerl@uwindsor.ca Xiaomin Lu Student Member, IEEE University of Windsor lu117@uwindsor.ca Narayan C. Kar Senior Member, IEEE University of Windsor nkar@uwindsor.ca Abstract - In this era of advanced computing where complex algorithms and expensive approaches are used to determine the machine parameters of a synchronous machine, this paper proposes a novel, economical and yet fundamental approach towards estimation of the d- and q-axis field and damper circuit parameters of a low/medium power wound-field synchronous machine. The proposed novel methodology employs fundamental voltage, current, flux linkage relationships of the 3-phase wound-field synchronous machine in a-b-c reference frame theory. Firstly, the proposed methodology has been explained in detail using analytical equations and then employed to determine the aforementioned parameters of a small laboratory synchronous machine. Other equivalent circuit parameters have been determined using conventional tests. Further validation of the proposed methodology was performed using two other larger machines with different nameplate ratings. Moreover, the aforementioned parameters of the larger machines were also experimentally determined using IEEE standard tests. Finally, a comparison of the results obtained employing the conventional and the proposed methodologies were performed and the proposed methodology has been established to be valid as the results are in close agreement. Index Terms - Damper circuit, field circuit, parameter estimation, wound-field synchronous machine. I. INTRODUCTION any papers have been written since the first ones by Park [1], [2] till today about the definition, characterization and measurement of electrical parameters of synchronous machines [3], [4]. Industrial test and measurement standards by world-renowned North American and European bodies viz. IEEE 115, IEEE 1110, IEC and NEMA MG1-2006 also exist for determination of parameters and stability and dynamic studies [5]-[7]. Although research on parameter determination of wound-field synchronous machines started many decades ago, this topic keeps on receiving active investigation as the need for development of fundamental, less expensive, flexible and yet reliable parameter determination procedures still exist. Knowledge of correct synchronous machine (SM) equivalent circuit parameters permits accurate predictions on power system dynamics, stability studies and real-time input power and exciter control [5]-[8], where the machine acts predominantly in the generator mode. These studies are equally important for similar dynamic studies of large high-power load commutated inverter (LCI) fed synchronous machine drives, where the machine predominantly works in the motoring mode [9] in applications such as pumped storage and ship propulsion. Accurate parameters for dynamic studies for predicting and analyzing changeover of modes with perspective to success of load/induced voltage commutation of the LCI drive thyristors at all loads and transient overvoltage during load commutation across the thyristors are of paramount importance [10]. Small and medium power wound field synchronous machine for drives applications also require parameter information obtained through simple yet reasonably accurate means for high performance parametersensitive real-time drive control applications [11]. Studies conducted in the early 1970s [12] showed that, in general, in stability analysis it is more important to use accurate machine data than to use more elaborate machine models. In developing and applying more detailed and accurate models [13], [14], it was found that an economic benefit could be obtained from the increased capability to transmit power generated at a lower cost site. Background literature obtained from [5]-[14] state that the standard tests used to determine the SM parameters are the short-circuit tests, standstill frequency response (SSFR) and time domain tests. Owing to their simplicity of implementation, off-line tests such as standstill frequency response (SSFR) and standstill time domain (SSTD) tests, have attracted the attention of researchers [15]-[19]. One noteworthy advantage about why SSFR testing has become an acceptable alternative to shortcircuit testing is that identification of field winding response is possible. They pose a low probability of risk to the machine being tested, and data in both direct and quadrature axes are available, with little change in the test setup without resorting to special short circuit and/or low-voltage tests.
