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传统意义上甲烷浓度大于20%定义为高浓度瓦斯。这个浓度的气体可以直接用来发电，也可以用于居民用气。淮南矿业就有一个非常大的储罐，用于周边居民供气。因为甲烷的爆炸极限是5%词16%，所以这部分气体的输送相对还是比较安全的。

Traditionally, methane concentration greater than 20% is defined as high concentration gas. This concentration of gas can be directly used for power generation or for residential gas use. Huainan Mining has a very large storage tank for gas supply to surrounding residents. Because the explosive limit of methane is 5% to 16%, the transportation of this gas is relatively safe.

甲烷浓度9%-20%，这一类瓦斯气体往往处于爆炸极限范围之内，对输送有比较高的要求。一般会在抽排泵站附近安装瓦斯发电站。对气体的输送一般会采用细水雾输送或者干粉输送。

Methane concentration ranges from 9% to 20%, and this type of gas is often within the explosive limit range, requiring high transportation requirements. Gas power stations are usually installed near pumping stations. Gas transportation is generally carried out using fine water mist or dry powder transportation.

甲烷浓度5%-9%，这一类的低浓度瓦斯比较不容易被点燃。所以传统的瓦斯发电机组，在这类气体上的发电功率往往都比较低。瓦斯电站在碰到这类浓度的气体后，往往都选择停站排空。现在有些低浓度瓦斯机组利用微喷引燃技术可以对这一类气体进行利用发电。

Methane concentration is 5% -9%, and this type of low concentration gas is less likely to ignite. So traditional gas generator sets often have relatively low power generation on this type of gas. Gas power stations often choose to shut down and evacuate when encountering gases of this concentration. Some low concentration gas units now use micro spray ignition technology to utilize this type of gas for power generation.

甲烷浓度低于5%，这也是所有瓦斯中排空量最大的一类气体。目前主流的技术是进行乏风氧化，副产物是制热。现在煤矿不让烧煤 冬季取暖是比较大的问题 ，乏风氧化可能会迎来一波高潮。

Methane concentration is less than 5%, which is also the type of gas with the largest exhaust volume among all gases. The current mainstream technology is to perform exhaust oxidation, with heating as a byproduct. Nowadays, coal mines do not allow coal burning for winter heating, which is a major problem. The lack of wind and oxidation may lead to a wave of enthusiasm.

发电机组会发生自动解列的情况主要有以下几种：

There are several situations where the generator set will automatically disconnect, including the following:

①、电网负荷太少，电站运行的功率裕量已超过最大裕量，此时，按事先设定轮到进入’备用状态‘的发电机组，允许其进入自动解列程序，经过负载转移、分闸、停车。进入’备用状态‘；

① The power grid load is too low, and the power margin of the power station operation has exceeded the maximum margin. At this time, according to the pre-set turn to enter the 'standby state' of the generator set, it is allowed to enter the automatic disconnection program, go through load transfer, disconnection, and shutdown. Enter 'standby state';

②、运行机组出现非立即停车的故障时，备用机组已启动并网运行后，故障机组允许进入故障解列停车程序；

② When a non immediate shutdown fault occurs in the operating unit, and the standby unit has been started and connected to the grid for operation, the faulty unit is allowed to enter the fault disconnection and shutdown procedure;

③、运行机组出现必须立即停车的故障时，其主开关立即跳闸，未经许可自动进入故障解列停车程序。

③ When a fault occurs that requires immediate shutdown of the operating unit, its main switch will trip immediately and automatically enter the fault disconnection and shutdown program without permission.

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