The wind turbine is installed in an open area in the field, and its installation height is high, so lightning protection measures need to be taken. The voltage of lightning discharge is as high as several hundred kilovolts or even hundreds of millions of volts, and the current generated varies from tens of kiloamperes to hundreds of kiloamperes. Lightning strike will cause damage to the electrical control, communication and mechanical components of wind turbine, such as blades.

为预防雷击需做如下措施，在叶尖预埋导体网，通过机舱上高处位置放置避雷针，机舱与塔架具备良好的导电特性，在基础施工过程当中，沿地基安装通到一米地下的位置，预埋以降低接地电阻阻值，或者采用多根导电体垂直打入深层底下，接地电阻阻值需小于10欧姆。采用屏蔽层或者光电转换系统，对通信远传系统进行保护，采用隔离原理的电源和变压器。

In order to prevent lightning stroke, the following measures shall be taken: the conductor network shall be embedded at the blade tip, and the lightning rod shall be placed at the high position on the engine room. The engine room and tower shall have good conductive characteristics. During the foundation construction, it shall be installed along the foundation to a position one meter underground, embedded to reduce the grounding resistance, or multiple conductors shall be vertically driven into the deep bottom, The grounding resistance shall be less than 10 ohms. The shielding layer or photoelectric conversion system is adopted to protect the communication remote transmission system, and the power supply and transformer based on the isolation principle are adopted.

不仅雷击会损坏风电机组，电网不稳定也会导致机组故障。风力发电机组大都处于电网末端，接入到35千伏和110千伏的电路，如果电网的三线电压不平衡，电压过高或过低，都会影响风力发电机组的运行，当电网三相不平误差超过5%，电压误差达到上下10%时，机组会停止运行。

Not only will lightning damage the wind turbine, but also the instability of the power grid will lead to unit failure. Most wind turbines are located at the end of the power grid and connected to 35 kV and 110 kV circuits. If the three-wire voltage of the power grid is unbalanced, the voltage is too high or too low, which will affect the operation of the wind turbine. When the three-phase unevenness error of the power grid exceeds 5% and the voltage error reaches up and down 10%, the unit will stop running.

风电发电机组的运行难免会出现故障，需要运维工程师去现场进行处理。在现场处理故障的同时，也会顺便进行一些机组的日常故障排查维护。日常故障排除需要运维工程师对风力发电机组进行仔细的观察，影响风机正常运行工作的不合理地方都要进行检修维护。同时也要听风力发电机组机械运行和电气的声音，检查机组运行的声音是否正常有无异响。

The operation of wind turbine generator unit will inevitably fail, and the operation and maintenance engineer needs to go to the site for treatment. While handling faults on site, routine troubleshooting and maintenance of some units will also be carried out. Daily troubleshooting requires the operation and maintenance engineer to carefully observe the wind turbine, and the unreasonable places affecting the normal operation of the wind turbine shall be repaired and maintained. At the same time, listen to the mechanical and electrical sound of the wind turbine generator set, and check whether the sound of the unit operation is normal and whether there is abnormal noise.