UAC389AE01 ABB 励磁控制器模块

UAC389AE01 ABB 励磁控制器模块

UAC389AE01 HIEE300888R0001自并励系统的优点
没有旋转部件。运行可靠性高，调整、维护简单，检修方便。
UAC389AE01 HIEE300888R0001自并励方式取消了励磁机，缩短了的汽轮机-发
电机轴系长度可提高机组轴系的稳定性、提高机组安全运行的水平。
因励磁调节直接在转子回路中，没有主励磁机时滞环节，属快速响应励磁系统，技术指标高，响应快，性能参数好。

自并励系统的缺点
整流装置电源电压取自发电机端，系统故障时，随着机端电压下降，影响励磁系统的强励能力。
有碳刷增加了维护量。
发电机近端短路时，因机端电压突然降低很多时可能不满足强励要求，强励减弱时，短路电流迅速衰减，而造成出口带时限继电器拒动，使故障扩大，须加有记忆功能继电器。
起励时，发电机剩磁不足以提供可控硅的导通电压，发电机不能自励，需要另外设置起励电源。

UAC389AE01 ABB 励磁控制器模块

Advantages of UAC389AE01 HIEE300888R0001 self-shunt excitation system
No rotating parts. High operation reliability, simple adjustment and maintenance, easy maintenance.
UAC389AE01 HIEE300888R0001 self-shunt mode cancels the exciter and shortens the turbine-engine
The length of motor shafting can improve the stability of unit shafting and improve the level of safe operation of unit.
Because the excitation regulation is directly in the rotor loop, there is no delay link of the main exciter, it is a fast response excitation system with high technical indicators, fast response and good performance parameters.

Disadvantages of self-shunt systems
The power supply voltage of the rectifier device comes from the generator end. When the system fails, the voltage drops along with the machine end, which affects the strong excitation ability of the excitation system.
Carbon brushes increase maintenance.
When the generator is short-circuited near the end, it may not meet the requirements of strong excitation when the terminal voltage is suddenly reduced. When the strong excitation is weakened, the short circuit current rapidly attenuates, resulting in the rejection of the outlet with a time limit relay and the expansion of the fault. A memory function relay must be added.
During excitation, the remanence of the generator is not enough to provide the on-voltage of the thyristor, and the generator can not be excited by itself, so it is necessary to set up another excitation power supply.

UAC389AE01 ABB 励磁控制器模块