瓦斯發(fā)電機組系統是集氣體-熱力-機械-電氣為一體的設備整體，利用煤礦的廢棄瓦斯進(jìn)行發(fā)電，不但可以變廢為寶，滿(mǎn)足煤礦的部分用電要求，還可以減少溫室氣體的排放，提升煤礦井下的安全系數。但是，受制于氣源以及使用環(huán)境的變化，瓦斯發(fā)電機在使用過(guò)程中經(jīng)常會(huì )出現故障，這些故障主要可分為：

The gas generator set system is a whole set of equipment integrating gas, heat, machinery and electricity. Using the waste gas of the coal mine for power generation can not only turn waste into treasure, meet some power requirements of the coal mine, but also reduce greenhouse gas emissions and improve the safety factor of the coal mine. However, subject to the changes of gas source and operating environment, gas generators often have faults during operation. These faults can be mainly divided into:

1、氣源故障：瓦斯氣的濃度、流量過(guò)低,還有因瓦斯輸送管道上氣液分離器、干式阻火器堵塞造成氣體流通不暢,輸送管道漏氣等,機組供氣不足的現象統稱(chēng)為氣源故障。

1. Gas source failure: the concentration and flow of gas are too low, the gas flow is blocked due to the blockage of gas-liquid separator and dry flame arrester on the gas transmission pipeline, and the gas leakage of the transmission pipeline. The phenomenon of insufficient gas supply of the unit is collectively referred to as gas source failure.

2、機組故障：機組故障主要包括機組本體零部件損壞。如潤滑系統漏油、進(jìn)氣閥和排氣閥損壞等。

2. Unit fault: the unit fault mainly includes the damage of unit body parts. Such as oil leakage of lubrication system, damage of inlet valve and exhaust valve, etc.

3、電氣故障：電氣故障主要包括點(diǎn)火系統不點(diǎn)、電壓低、二次線(xiàn)連接觸不良、開(kāi)關(guān)損壞等。

3. Electrical fault: electrical fault mainly includes ignition system failure, low voltage, poor connection of secondary line, switch damage, etc.

在上述三類(lèi)故障中，其中尤以機組故障尤為突出，其約占總體故障的70％左右，且發(fā)生故障后，導致的后果為嚴重，因此，針對機組故障的實(shí)時(shí)監測，對故障的預警具有重要意義。本發(fā)明針對機組故障中常見(jiàn)的啟動(dòng)故障，設計了一種多特征量采集系統，配合判據理論，實(shí)現對發(fā)電機組啟動(dòng)故障的的診斷。

Among the above three types of faults, the unit fault is particularly prominent, accounting for about 70% of the total faults, and the consequences are serious after the fault occurs. Therefore, the real-time monitoring of the unit fault is of great significance to the early warning of the fault. The invention designs a multi characteristic quantity acquisition system for common startup faults in unit faults, and realizes the diagnosis of generator unit startup faults in cooperation with the criterion theory.

瓦斯發(fā)電機組廠(chǎng)家認為啟動(dòng)系統故障主要由以下原因造成：

The manufacturer of gas generator set believes that the starting system fault is mainly caused by the following reasons:

1、啟動(dòng)電磁閥是否良好,電流、電壓是否正常。由于電磁閥內接線(xiàn)空間較小,接線(xiàn)時(shí)很容易造成導線(xiàn)斷線(xiàn),又不易被發(fā)現,運行一段時(shí)間由于導線(xiàn)或端子氧化等造成接觸不良,均會(huì )造成電磁閥無(wú)法啟動(dòng)；

1. Whether the starting solenoid valve is in good condition, and whether the current and voltage are normal. Due to the small wiring space in the solenoid valve, it is easy to cause wire breakage during wiring, and it is not easy to be found. After a period of operation, the solenoid valve cannot be started due to poor contact caused by oxidation of wires or terminals;

2、壓縮空氣壓力是否正常,空氣屏內是否有積水和雜質(zhì)、臟物造成主啟動(dòng)閥堵塞,無(wú)法開(kāi)啟；

2. Whether the compressed air pressure is normal, and whether there is water, impurities and dirt in the air screen, which causes the main starting valve to be blocked and cannot be opened;

3、空氣分配器工作是否良好,由于機組運行時(shí)振動(dòng)較大、油質(zhì)較臟,空氣分配器內滑塊邊緣易磨損,造成密封不嚴漏氣,此時(shí)機組也會(huì )因啟動(dòng)壓力不足,無(wú)法啟動(dòng)。

3. Whether the air distributor works well. Due to the large vibration and dirty oil during the operation of the unit, the sliding block edge in the air distributor is easy to be worn, resulting in loose sealing and air leakage. At this time, the unit can not be started due to insufficient starting pressure.

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