鑒于焦化發(fā)電機組上的AVR屬于非拆修配件，損壞了就要換新的，所以，我們主要分析造成發(fā)電機上的AVR損壞的原因，盡可能避免AVR的損壞是重要的，只要使用適當，可以提高AVR的使用壽命。那么焦化發(fā)電機組的AVR損壞與失磁怎么回事？

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?

焦化發(fā)電機組的AVR電路由整流主回路，電壓檢測電路，比較控制電路三個部分組成；排除原有電氣元件本身質(zhì)量上的原因造成損壞的可能性而言，在整塊AVR電路中，主回路和比較控制電路的工作頻率變動大；其中主回路的整流橋和比較電路中的晶體管變動更頻，其損壞比例占整塊AVR損壞率的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.

發(fā)電機電壓越穩(wěn)定，AVR內(nèi)的變動頻率越小；比較電路中的晶體管的開關(guān)動作越小，AVR損壞的幾率越??；輸出負載相對平穩(wěn)，AVR內(nèi)的變動頻率越小，比較電路中的晶體管的開關(guān)動作越小，AVR損壞的幾率越??；柴油機的轉(zhuǎn)速越穩(wěn)定，變化電流對AVR的振蕩沖擊越?。唤?jīng)常性的“游車”和超負載，三相負載相差太大是造成AVR損壞的主要原因；選擇帶E、F、C燃油系統(tǒng)的發(fā)電機組，由于頻率變動小，AVR的使用會更可靠。

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.

此外焦化發(fā)電機組長時間不用，導致出廠前含在鐵芯中的剩磁失去，勵磁線圈建立不起應有的磁場，這時發(fā)動機運轉(zhuǎn)正常但發(fā)不出電，此類現(xiàn)象新機?；蜷L期不用的機組較多。處理方法：

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）如機組配有勵磁按鈕的，按一下勵磁按鈕

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

2）無勵磁按鈕的，用電瓶對其充磁；

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

3）帶一個燈泡負荷，超速運轉(zhuǎn)幾秒鐘。

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

焦化發(fā)電機組的AVR損壞與失磁這兩個問題，我們已經(jīng)在以上講解內(nèi)容了，您對此有什么看法或者需求，可以隨時來我們網(wǎng)站http://www.51credits.cn進行留言咨詢！

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 http://www.51credits.cn Leave a message for consultation!