鉴于焦化发电机组上的AVR属于非拆修配件，损坏了就要换新的，所以，我们主要分析造成发电机上的AVR损坏的原因，尽可能避免AVR的损坏是重要的，只要使用适当，可以提高AVR的使用寿命。那么焦化发电机组的AVR损坏与失磁怎么回事？

In view of the fact that the AVR on the coking generator unit is a non overhaul accessory, which will be replaced if it is damaged, we mainly analyze the causes of AVR damage on the generator. It is important to avoid AVR damage as much as possible. As long as it is used properly, the service life of AVR can be improved. What about the AVR damage and loss of excitation of coking generator set?

焦化发电机组的AVR电路由整流主回路，电压检测电路，比较控制电路三个部分组成；排除原有电气元件本身质量上的原因造成损坏的可能性而言，在整块AVR电路中，主回路和比较控制电路的工作频率变动大；其中主回路的整流桥和比较电路中的晶体管变动更频，其损坏比例占整块AVR损坏率的90%以上。

The AVR circuit of the coking generator unit consists of three parts: the main rectifier circuit, the voltage detection circuit and the comparison control circuit; To eliminate the possibility of damage caused by the quality of the original electrical components, in the whole AVR circuit, the working frequency of the main circuit and the comparison control circuit changes greatly; The rectifier bridge of the main circuit and the transistor in the comparison circuit change more frequently, and the damage ratio accounts for more than 90% of the damage rate of the whole AVR.

发电机电压越稳定，AVR内的变动频率越小；比较电路中的晶体管的开关动作越小，AVR损坏的几率越小；输出负载相对平稳，AVR内的变动频率越小，比较电路中的晶体管的开关动作越小，AVR损坏的几率越小；柴油机的转速越稳定，变化电流对AVR的振荡冲击越小；经常性的“游车”和超负载，三相负载相差太大是造成AVR损坏的主要原因；选择带E、F、C燃油系统的发电机组，由于频率变动小，AVR的使用会更可靠。

The more stable the generator voltage is, the smaller the variation frequency in AVR is; The smaller the switching action of the transistor in the comparison circuit, the smaller the probability of AVR damage; The output load is relatively stable, the smaller the variation frequency in the AVR, the smaller the switching action of the transistor in the comparison circuit, and the smaller the probability of AVR damage; The more stable the speed of diesel engine is, the smaller the oscillation impact of variable current on AVR is; Frequent "traveling block", overload and large difference between three-phase loads are the main reasons for AVR damage; The generator set with E, F and C fuel systems is selected. Since the frequency variation is small, the use of AVR will be more reliable.

此外焦化发电机组长时间不用，导致出厂前含在铁芯中的剩磁失去，励磁线圈建立不起应有的磁场，这时发动机运转正常但发不出电，此类现象新机。或长期不用的机组较多。处理方法：

In addition, the coker generator is not used for a long time, which leads to the loss of residual magnetism contained in the iron core before leaving the factory, and the excitation coil cannot establish the due magnetic field. At this time, the engine runs normally but cannot generate electricity, which is a new machine. Or there are many units that have not been used for a long time. Handling method:

1）如机组配有励磁按钮的，按一下励磁按钮

1) If the unit is equipped with an excitation button, press the excitation button once

2）无励磁按钮的，用电瓶对其充磁；

2) If there is no excitation button, use the battery to magnetize it;

3）带一个灯泡负荷，超速运转几秒钟。

3) With a bulb load, run for a few seconds at overspeed.

焦化发电机组的AVR损坏与失磁这两个问题，我们已经在以上讲解内容了，您对此有什么看法或者需求，可以随时来我们网站//www.gz-yanye.com进行留言咨询！

We have explained the above two problems of AVR damage and loss of excitation of coking generator unit. If you have any views or needs, you can come to our website at any time //www.gz-yanye.com Leave a message for consultation!