电磁干扰对励磁系统的影响分析与防护

电磁干扰在火力发电厂中普遍存在，对电厂的许多环节产生影响，尤其对测量仪器和各种控制设备产生的影响较大，严重时影响电力系统的稳定性以及发电机组的安全运行。对西塞山发电厂1号汽轮发电机组励磁调试过程中由于电磁干扰而导致励磁电流波形紊乱、励磁系统无法正常工作的情况进行了分析，阐述了电磁干扰的来源，提出了抗干扰措施。

Analysis and Prevention of Electromagnetic Interference in the Excitation System during Commissioning

The electromagnetic environment at the job site in power plant is very complicated, all kinds of electromagnetic interference that damage to the measuring equipments and control devices have greatly threatened the stability and safe operation of the site equipment .The paper describes the electromagnetic interference which attributes to the ripple of excitation current during the commissioning of excitation system in Xisaishan Power Plant,by analyzing the source of electromagnetic interference,probing into the method of how to avoid it ,such as shielding,earthing,isolation against its channel ,the preventive has been put forward.