A large number of failures have been observed in the power factor correction capacitors of wind turbines. Additionally, failures in the contactors, contactor pre-insertion resistors, fuses and capacitor discharge resistors have been observed.
Circuit modelling is required to identify expected levels of inrush, terminal voltages and other operational parameters.
A series of simulations are required to simulate the following conditions.
All simulations shall be run as three phase simulations with voltages measured as line to line quantities unless line to earth values are of specific interest.
1. Switching transients with and without pre-insertion resistors. These simulations shall consider variation in the point on the switching wave that 22K1 is opened or closed. It is anticipated that the worst-case switching transients will occur when the 14th bank is switched into service and 13 banks are already in service, so this particular condition shall be simulated along with any...