高压电容补偿柜通常由：高压电容器、高压电抗器和高压智能控制器组成。投切电容器时合闸涌流是工作电流的几十倍，降低了电容器的使用寿命，影响了供电质量。而电抗器具有抑制电流突变的能力，与电容器搭配能很好的抑制合闸涌流。

另外电容器对谐波有放大作用，设备中的谐波会影响电容器的安全。串联电抗器后可抑制特定次的谐波，12%、13%、14%能抑制3次及3次以上谐波及合闸涌流；5%、6%、7%能抑制5次及5次以上谐波及合闸涌流，电抗率越高抑制效果越好；1%只能抑制合闸涌流，不能抑制9次以下的谐波。

因此，高压电容柜加电抗器主要有两个作用：一、限制电容器投切时的合闸涌流；二、抑制高次谐波。

Does a 10kV capacitor bank need a reactor?

A high-voltage capacitor compensation cabinet is usually composed of high-voltage capacitors, high-voltage reactors and high-voltage intelligent controllers. When the capacitor is cut off, the closing inrush current is dozens of times of the working current, It reduces the service life of capacitor and affects the power supply quality. However, a reactor possesses the ability to suppress sudden changes in current, When paired with a capacitor, it can effectively suppress the closing inrush current.

Additionally, capacitors can amplify harmonics. The harmonics present in the electrical equipment can adversely affect the safety of the capacitors. After connecting a reactor in series, specific-order harmonics can be suppressed. 12%, 13%, 14% can suppress the 3rd and more than 3rd harmonics and closing Inrush Current, 5%, 6%, 7% can suppress 5th and more than 5th harmonic and closing Inrush Current, The higher the resistivity, the better the inhibitory effect; Only 1% can suppress the closing inrush current, and can not suppress the harmonics below 9 times.

Therefore, the high voltage capacitor cabinet with reactor has two main functions: 1st. Limit the closing inrush current during capacitor switching; 2nd. Suppress high harmonic.