带直联主变压器的水轮发电机磁能估算

Magnetic Field Energy Estimation of Hydrogenerator with a Directly Connected Main Transformer

提出了一种带直联主变压器的水轮发电机磁场能量的估算方法，给出了发电机-主变压器组 联合空载特性的概念，并利用发电机空载特性的分析表达式和主变压器空载磁化曲线的折线表达 式进行了 Simulink 仿真。最后，针对三峡700 MW 水轮发电机组进行了带直联主变压器的水轮发 电机磁场能量估算。

A method for estimating the magnetic field energy of a hydrogenerator with a directly connected main transformer is given. The definition of joint no-load characteristics （JNLC） of generator-main transformer set is also presented. A simulation with Simulink for JNLC is conducted by use of analytic expressions for no-load characteristics of the generator and no-load magnetic curve of the main transformer. As an example, the magnetic field energy of a 700 MW hydrogenerator with directly connected main transformer of the Three gorges Hydropower Plant is estimated.