大型发电机组合灭磁方式

Compound De-excitation Used for High Capacity Generators

在广泛研究现有发电机灭磁方案的基础上,提出一种新型灭磁方案,即线性电阻加非线性电阻组合灭磁。仿真结果表明,该方案克服了线性灭磁速度慢的缺点,同时提高了使用纯非线性ZnO电阻灭磁的可靠性并因此减少了维护工作量。该灭磁方案已被采用到600MW火电机组中。

After a study of various existing de-excitation methods of generators, a new method of using the linear resistor and nonlinear resistor together as the de-excitation resistance is presented. The simulation results show that the method proposed has helped increase the speed of de-excitation compared with the linear resistor. At the same time, it can improve the de- excitation reliability when a ZnO nonlinear resistor is adopted, reducing the maintenance workload. This method has been adopted in a de-excitation system of 600 MW steam turbo-generator.