发电机的谐波组开路或短路，无三次谐波电压输出，检查绕组接头或拆换绕组。

If no triple overtone voltage, check the winding lug or replace with another winding.

youdao

由于三次谐波电压在电机负载时将相应增高，因此无须其他任何复杂电压自动调节器即可达到自激恒压性能。

Since triple overtone voltage will increase accordingly when there is load in the generator, it can activate constant voltage on its own without any other voltage automatic governor.

youdao

进而提出了基于多回路-有限元耦合数学模型的同步发电机定子单相接地故障三次谐波电压保护方案校验方法。

Furthermore, a checkout method for the third harmonic voltage based protection scheme of stator ground fault in generators is presented based on the verified MLM-FEM coupled model.

youdao