就瓦斯发电机组的系统整体而言，火花塞点火电缆线内的交流电流等形成的电磁干扰是主要的干扰源。由干发电机组作环境的特殊性，在这些场合中要想避免经常发生的较强的电磁干扰几乎是不可能的。尽管新型的发电机组针对电磁干扰问题采取了很多措施，也无法忽视此类隐患并且由于工作场合中的条件的限制或者人为的疏忽如调试不当，也增大了此类故障发生的概率。

As for the whole system of the gas generator set, the electromagnetic interference caused by the AC current in the spark plug ignition cable is the main interference source. Due to the particularity of the dry generator set as the environment, it is almost impossible to avoid the frequent strong electromagnetic interference in these occasions. Although the new generation unit has taken many measures to solve the problem of electromagnetic interference, it can not ignore such hidden dangers and the probability of such failures is also increased due to the limitations of conditions in the workplace or human negligence, such as improper commissioning.

例如某台发电机组在并网后，正常运转一段时间，之后发生了故障当该机组负荷<300kW时，机组运行平稳;但是当负荷>300kW时，大范围的负荷摆动出现了。机组人员进行了脱网操作，在没有负荷的情况下，发电机组的运行又趋于正常。这种故陪的迷惑性很大，因为先想到的原因是两种:

For example, a generator unit operates normally for a period of time after grid connection, and then fails. When the unit load is less than 300kW, the unit operates smoothly; However, when the load is more than 300kW, a wide range of load swing occurs. The crew carried out the off-grid operation, and the operation of the generator set tended to be normal again without load. This kind of reason is very confusing, because there are two reasons to think of first:

(1)发电机的励磁系统出现问题;(2)发动机带负荷能力下降。

(1) The excitation system of the generator has problems; (2) The load capacity of the engine decreases.

错误的判断耗费了工作人员大量的时间和精力，而问题一直没有解决。后来在做会面机检时发现信号线中的一根线与屏蔽层短路，并且屏蔽线的接线处理上存在一定的问题。更换该屏蔽线后再做测试，机组正常运转。

The wrong judgment consumes a lot of time and energy of the staff, and the problem has not been solved. Later, during the meeting machine inspection, it was found that one of the signal wires was short-circuited with the shielding layer, and there was a certain problem in the wiring processing of the shielding wire. After replacing the shielded wire, conduct the test, and the unit operates normally.

在机检的后期阶段发现，该机组在布线时出现错置，将信号线与发电机组的输出电缆敷设在一起，并且相互缠绕，这就是干扰产生的真正原因。当信号线的屏蔽层性能良好并且接线方式也正确时，可以正常屏蔽干扰信号，发电机组运转正常而当屏蔽层失效时，干扰信号就会带来严重的影响。

In the later stage of the machine inspection, it was found that the unit was wrongly wired, and the signal line and the output cable of the generator set were laid together and intertwined, which is the real reason for the interference. When the shielding layer of the signal line has good performance and the wiring mode is correct, the interference signal can be shielded normally, and the generator set operates normally. When the shielding layer fails, the interference signal will bring serious impact.

建议在安装发电机组的施工过程中，须将信号电缆与电流电缆分开敷设，以避免产生电磁干扰。信号干扰带来的影响通常比较隐蔽，只有在特定情况下才会表现出来，正是由于这种隐蔽性，经常迷惑工作人员，给安装和调试I作带来很大的困难。只有正确判断信号干扰带来的燃气发电机组异常表现，才可以正确的排除相应的故障。

It is suggested that the signal cable and the current cable should be laid separately during the construction process of installing the generator set to avoid electromagnetic interference. The influence of signal interference is usually hidden and can only be shown under specific circumstances. It is precisely because of this concealment that it often confuses the staff and brings great difficulties to the installation and commissioning of the work. Only by correctly judging the abnormal performance of the gas generator unit caused by signal interference can the corresponding fault be correctly eliminated.

在故障发生时，切忌盲目猜测，应从故障现象分析内在原因，结合设备运转原理进行分析，由表及里，先易后难。如果条件允许尽可能的在机组运行中判断问题所在，尽量避免停机检修，因为故障现象可能随著设备的停转而消失，从而增大了排查故障的困难。更多相关内容就来我们网站//www.gz-yanye.com进行咨询了解吧！

When a fault occurs, it is not allowed to guess blindly. The internal causes should be analyzed from the fault phenomenon and combined with the operation principle of the equipment. If conditions permit, try to determine the problem during the unit operation and avoid shutdown for maintenance as much as possible, because the fault phenomenon may disappear with the equipment shutdown, thus increasing the difficulty of troubleshooting. Come to our website for more relevant content //www.gz-yanye.com Consult and understand!