Start up excitation of biogas generator is a professional term in the field of generator. It refers to the working process of voltage set up by generator from idle state. Sometimes the generator can not be excited. How to check the cause of the fault?

侧刀闸、起励电源开关是否均合上。然后再检查是否有起励电源，PT保险是否熔断，PT回路的接线是否松动。

Whether the side knife switch and excitation power switch are all closed. Then check whether there is a build-up excitation power supply, whether the PT fuse is blown, and whether the wiring of the PT circuit is loose.

如果这些都正常，就需要另换一个通道起励。如果能够正常起励了那么就说明是调节器通道内的原因;如果沼气发电机组还是无法正常起励，则应当检查起励回路、脉冲公共回路、可控硅整流器、转子回路是否有接地或者短路等。

If all of these are normal, another channel is needed to make excitation. If the excitation can be started normally, it indicates that it is the reason in the channel of the regulator; if the biogas generator set is still unable to start excitation normally, check whether there is grounding or short circuit in the excitation circuit, pulse common circuit, silicon controlled rectifier and rotor circuit.

如果调节器没有发出“起励失败”的信号，但沼气发电机组仍然无法自动起励，那么可以在励磁盘附近起励或者远方人工起励如果远近方都无法人工起励，应当检查发电机组频率是否没有达到45HZ以上。

If the regulator doesn't send out the signal of "excitation failure", but the biogas generator set still can't start excitation automatically, then the excitation can be started near the excitation disk or the remote manual excitation can be started. If the manual excitation cannot be started in the far and near places, it should be checked whether the frequency of the generator set does not reach more than 45Hz.

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