UFC911B110 3BHE037864R0110 ABB processor module warranty for one year

Description

Function of UFC911B110 excitation system
The excitation system is an important part of the generator, which has a great impact on the safe and stable operation of the power system and the generator itself. The main functions of UFC911B110 are:
1. Before the generator is connected to the grid, adjust the terminal voltage output by the generator;
2. After the generator is connected to the grid, adjust the reactive power borne by the generator;
3. Improve the static and dynamic stability of synchronous generators in parallel operation
3.1 Static stability: sensitive and fast excitation regulation system can improve the stability of generator under small interference (static stability);
3.2 Dynamic stability: the excitation regulation system with fast response and high top voltage can improve the stability of the generator under large disturbances (dynamic stability and transient stability);
4. In case of generator accident, rapidly de excitation the rotor winding to protect the safety of the generator.
At present, self shunt excitation system is most widely used, and its advantages are as follows:
There are no rotating parts. High operation reliability, simple adjustment and maintenance, and convenient maintenance.
The self shunt excitation method eliminates the exciter, and the shortened turbine generator shaft system length can improve the stability of the unit shaft system and the level of safe operation of the unit.

Because the excitation regulation of UFC911B110 is directly in the rotor circuit, there is no time delay link of the main exciter, and it is a fast response excitation system with high technical indicators, fast response and good performance parameters.
Disadvantages of self shunt excitation system
The power supply voltage of the rectifier is taken from the generator terminal. When the system fails, the forced excitation capacity of the excitation system will be affected along with the voltage drop of the generator terminal.
The carbon brush increases the maintenance.
In case of short circuit at the near end of the generator, the generator terminal voltage may not meet the requirements for forced excitation when it suddenly decreases for a lot. When the forced excitation is weakened, the short circuit current will decay rapidly, which will cause the time limit relay at the outlet to refuse to operate and expand the fault. Memory function relay must be added.
During excitation, the remanence of the generator is not enough to provide the conduction voltage of the silicon controlled rectifier, and the generator cannot be self-excited, so additional excitation power supply is required.

details: if you need an urgent delivery order, please feel free to contact us, and we will do our best to meet your needs.

Price problem: if you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.