并联电容器出现故障了怎么办？根据小编多年的经验给大家总结了常见的并联电容器的故障原因以及解决方法。

　　What to do if the shunt capacitor fails? Based on years of experience, this paper summarizes the common fault causes and solutions of shunt capacitor.

　　1、并联电容器的故障判断及原因分析

　　Fault diagnosis and cause analysis of shunt capacitor

　　（1）电容器外壳膨胀：由一坑电场作用，使得电容器内部的绝缘物游离，分解出气体或者部分元件击穿，电极对外守则放电，使得密封外壳的内部压力增大，导致外壳膨胀变形。

　　Expansion of capacitor shell: under the action of a pit of electric field, the insulation inside the capacitor is free, and the gas or some components are broken down. The electrode is discharged externally, which increases the internal pressure of the sealed shell, resulting in the expansion and deformation of the shell.

　　（2）渗漏油：并联电容器渗漏油是一种常见的现象，主要是由于产品质量不良，运行维护不当，以及长期运行缺乏维修导致外皮生锈腐蚀而造成的。

　　Oil leakage: oil leakage of shunt capacitor is a common phenomenon, which is mainly caused by poor product quality, improper operation and maintenance, and lack of maintenance during long-term operation.

　　（3）电容器温升过高：主要原因是电容顺过电流和通风条件差。例如，电容顺室外调计不合理造成通风不良；电容器长时间过电压运行造成电容器过电流；整流装置产生的高次谐波使电容器过电流等。此外，电容器内部元件故障，介质老化、介质损耗、介质损失角正弦值增大都可能导致电容器温升过高。电容器温升高将影响电容器的寿命，也可能导致绝缘击穿使电容顺短路。

　　The temperature rise of capacitor is too high: the main reason is that the capacitor current and ventilation condition are poor. For example, the unreasonable internal and external adjustment of the capacitor results in poor ventilation; the long-term overvoltage operation of the capacitor causes the capacitor over-current; the high-order harmonic generated by the rectifier device makes the capacitor over-current. In addition, the internal component failure of capacitor, dielectric aging, dielectric loss, and the increase of dielectric loss angle sine value may lead to high temperature rise of capacitor. The increase of capacitor temperature will affect the life of capacitor, and may also lead to insulation breakdown and capacitor short circuit.

　　（4）电容器瓷瓶表面闪络放电：其原因是瓷绝缘有缺陷，表面脏污。

　　Flashover discharge on the surface of capacitor porcelain bottle: the reason is that the porcelain insulation is defective and the surface is dirty.

　　（5）声音异常：如果运行中，发现有放电声或其它不正常声音说胆电容器内部有故障。

　　Abnormal sound: if discharge sound or other abnormal sound is found during operation, it is said that there is a fault inside the capacitor.

　　（6）电容器爆破：哪里凶件发生极间或对外壳绝缘击穿，与之并联的其它电容器将对该电容器释放很大的能量，从而导致电容器爆破并引起火灾。

　　Capacitor explosion: where the insulation breakdown occurs between poles or to the shell, other capacitors connected in parallel will release great energy to the capacitor, which will lead to capacitor explosion and fire.

　　2、并联电容器的故障解决方法

　　Solution to the fault of shunt capacitor

　　（1）电容器外壳渗、漏油不严重时，可在外壳渗、漏处除锈、焊接、涂漆。

　　When the leakage of capacitor shell is not serious, rust removal, welding and painting can be carried out at the leakage and leakage parts of the shell.

　　（2）电容光焕发器外守则膨胀则应更换。

　　If the external code of the electric radiant device expands, it should be replaced.

　　（3）如室温过高，应改善通风条件；如因其它原因造成电容顺温升过高，则应查明原因进行处理；如系电容器本身的问题则就硬功夫换电容器。

　　If the room temperature is too high, the ventilation condition should be improved; if the temperature rise of the capacitor is too high due to other reasons, the cause should be found out for treatment; if it is the problem of the capacitor itself, it is necessary to replace the capacitor.

　　（4）电容器应定期检查、清扫。

　　Capacitors should be inspected and cleaned regularly.

　　（5）若电容顺有异常声音应注意观察。严重时，应立即停止其运行，并进行更换。

　　If there is abnormal sound in the capacitor sequence, pay attention to the observation. If it is serious, it should be stopped immediately and replaced.

　　（6）电容器发生爆破，应及时更换。

　　The capacitor should be replaced in time in case of explosion.