UNS0881a-P,V1 3BHB006338R0001 | ABB | Low frequency system module

Description

UNS0881a-P,V1 3BHB006338R0001 | ABB | Low frequency system module

1. .Many products are not yet on the shelves please contact us for more products
2. .If there is any inconsistency between the product model and the picture on display, the model shall prevail. Contact us for the specific product picture, and we will arrange to take photos in the warehouse for confirmation
3. .We have 16 shared warehouses around the world, so please understand that it can sometimes take several hours to accurately return to you. Of course, we will respond to your concerns as soon as possible

When UNS0881a-P,V1 or loss of step occurs, it is necessary to quickly determine whether it is caused by misoperation of the factory and observe whether a certain generator has lost excitation. If the situation in our factory is normal, we should understand whether the system has malfunctioned to determine the cause of oscillation or loss of step. The handling of generator oscillation or loss of excitation is as follows:
a) If it is not caused by the loss of excitation of a certain generator, the excitation current of the generator should be immediately increased to increase the electromotive force of the generator, increase the power limit, and improve the stability of the generator. This is due to the increase in excitation current, which increases the tension between the stator and rotor magnetic poles, weakens the inertia of the rotor, and pulls it into synchronization when the generator reaches the balance point. At this time, if the generator excitation system is in a strong excitation state, no intervention should be made within 1 minute.

b) If UNS0881a-P,V1 is caused by the high power factor of a single machine, the active power should be reduced while increasing the excitation current. This can not only reduce the rotor inertia, but also increase the stable operation capacity of the unit by increasing the power limit.
c) When UNS0881a-P,V1 is caused by a system malfunction, the excitation current of each generator should be immediately increased and handled according to the factory’s position in the system. If our factory is at the sending end and is a high-frequency system, the active power of the unit should be reduced; On the contrary, if the factory is in the receiving end and is a low-frequency system, the active power should be increased, and emergency measures should be taken if necessary to increase the frequency.
d) If the UNS0881a-P,V1 is caused by a single machine out of step and the above measures have not yet entered the synchronization state after a certain period of time, the unit and system can be disconnected according to on-site regulations, or the two parts of the system in the same period can be disconnected according to scheduling requirements.

Mailbox：sauldcsplc@gmail.com |UNS0881a-P,V1 3BHB006338R0001
www.abbgedcs.com | Qiming Industrial Control | Simon +86 13822101417