When the keys power fails, the diesel generator set demands to be instantly begun.
When the keys power fails, the diesel generator set demands to be instantly begun. There are many ways to take the starting signal, some are extracted from the high-voltage side, and also some are drawn from the low-voltage side.
The author likes to utilize the voltage loss signal, which is taken from the keys side of the ATSE for mains/generator conversion, that is, to identify whether the emergency situation bus section (area III bus) has power, it is exactly due to the fact that the crucial tons is linked to the emergency bus area. When there is no electricity on the emergency bus area, the diesel generator can be started and supply power to the lots within the specified time. When the actual voltage is less than 50% Ue, it can be thought about that the voltage is lost.
There need to also be an appropriate hold-up in starting the diesel generator set. The purpose of the delay is to allow the multi-channel keys to have adequate conversion time. As displayed in Figure 1, after one channel loses power, the bus connection 3QF is closed, and the other channel is powered. After the second power supply is removed once more, the generator can be instantly started. Stay clear of frequent misstarting of the unit.
When the mistake occurs, the 1QF and 2QF actions are created, and also the voltage at the reduced end of the 4QF at the pick-up factor is zero. At this time, it ought to have a mistake obstructing feature, and also the engine should not be immediately begun.
Basically, the self-starting signal of the emergency situation diesel generator collection need to be extracted from the power loss signal of the appropriate keys, with a particular hold-up, the hold-up time ought to be able to prevent the conversion between numerous keys, and have a mistake blocking function.
Post time: Jan-06-2023