Influence of the Variation of the Input Parameters on the Simulation Results of a Large Hydrogenerator

Effects of lifting reactance requirements on the optimal design of converter-fed synchronous hydrogenerators

“…The results are given in Table IV. The calculated values are somewhat lower than the measured values for generator G2. For G3 and G5, the synchronous and subtransient reactances calculated matches well with the In order to compare the loss calculations made to real loss data, the 122.6 MVA generator presented in [4] was used. Design data for the generator were used to calculate the losses with the analytical methodology that is used for all calculations in this paper.…”

“…Subject to synchronous reactance constraints, the length of the airgap is dimensioned to optimize the efficiency by minimizing the magnetizing current [4].…”

Open-circuit and short-circuit core losses computation in a large hydro generator

“…It can be observed in this case that the flux density magnitude did not exceed 1.2 Tesla for all sensors. Many other core loss models were proposed in the last decade [5][6][7][8][9][10][11] that considered the Steinmetz model as a base for the iron separation method. The recent time-domain dynamic core loss model proposed recently in [6] is used in this case study to compute the magnetic core losses.…”

“…The time-domain dynamic-core loss model proposed in [6] was initially applied to compute instantaneous core losses in small electromagnetic devices in both twodimensional and three-dimensional finite element analysis. The model proposed in [6] was extended [7][8][9][10] to compute the magnetic-core losses and their corresponding spatial distribution in large hydroelectric generators.…”

Performance analysis of a large hydro generator after disconnection of damaged coils

“…With the advance in powerful computation, finite element method is now widely used to determine many characteristics of large rotating electrical machines such as: the core loss distribution in different parts of the machine [5][6][7][8] at different operating conditions including partly damaged machines. Recently, complete models of large machines were simulated to investigate the effects of the cut-coil bar using FEM [5].…”