核电站大型无刷励磁发电机转子温度测量方法分析

主要介绍了核电站百万千瓦级,不同无刷励磁方式下汽轮发电机组转子温度的测量方法。大亚湾核电站、岭澳一期核电站采用三机旋转励磁,通过在励磁机定子的磁极之间装设探测线圈,在励磁机转子轴上安装测量滑环,测量转子电压、电流得到转子温度。在正在建设的岭澳二期项目中,采用机端励磁变压器构成两机励磁系统,通过工厂实验数据和一定算法测量转子实时温度的新方法。该方法实现简单,无需额外装置,测量可靠性高,提高了发电机的安全运行水平,在我国积极发展核电的今天,具有一定的参考意义。

Rotor Windings Temperature Monitoring for Nuclear Power Plant Large Brushless Excitation Generator

The measuring methods of generators' rotor according to different brushless excitation types in nuclear power plants of 1 000 MW are introduced.The three-rotor exciters of excitation system are adopted in of Daya Bay,LA phase I.In order to monitor the rotor windings temperature,a search coil is provided located in the main exciter stator between a pair of poles to measure the generator rotor current,and a pair of instrument sliprings are provided on the exciter rotor shaft to measure the generator rotor winding voltage.For the under-construction LA phase II,a calculation based on a computerized method is proposed.It needn't extra equipments and can be realized easily,so it will enhance the reliability and will do good to the operation of generator.China government has been accelerating the development of nuclear power plants,so it is helpful for the development of nuclear power plants.