Determination of high power synchronous generator subtransient reactances based on the waveforms for a steady state two-phase short-circuit

Determination of the Leakage Reactance of End Windings of a High-Power Synchronous Generator Stator Winding Using the Finite Element Method

“…Table 3 presents the relative errors of the analytical calculations. It follows from Table 3 that from among the reactance values calculated on the basis of analytical formulas, the closest value to the reference value is obtained from the D ąbrowski Equation (2). Due to the high complexity of the phenomena and the multitude of design solutions of end windings of synchronous generators, the above conclusion is not of a general nature.…”

“…In order to make the calculations carried out with the use of two-dimensional field-circuit models more accurate, these models are supplemented with resistances and inductances of the end windings of the stator winding in the form of lumped parameters. This approach is commonly known and most often used in practice [1][2][3]. In traditional investigations, the values of these parameters are estimated based on the design data, when using approximate analytical relationships known from the design studies [4][5][6][7].…”

“…Figure 5 shows the two-dimensional model of the analyzed synchronous generator together with a grid of triangular elements consisting of 48,240 elements. This model was verified experimentally based on the comparison of the measured and calculated no-load and three-phase short-circuit characteristics [2]. The analysis of the impact of the inductance of end windings was carried out by calculating the waveforms in the initial moments of the three-phase short-circuit of the stator windings of the synchronous generator.…”

Dynamic analysis of a mechatronic drive system with an induction motor

“…A line-to-line fault also affects the supply side and should be considered for safety reasons. A line-to-line fault in an induction motor designed by Berhausen and Boboń (2018) usually occurs when the stator winding insulation is damaged by an electrical breakdown in the adjacent phase. A short circuit between phases (line-to-line fault) is random in its location, and it is impossible to determine where it will occur.…”

Analysis of power system operation at asymmetrical load

“…Equations describing asymmetrical short-circuit processes of a synchronous machine are differential equations with periodically variable coefficients, which makes their solution difficult [2,3]. In the case of standalone operation of a synchronous machine (without PS), it is possible to find a solution by approximate methods [2,3,4]. The analysis of the PS work with all its elements (including synchronous generators) is complicated and only practically possible using numerical methods.…”