The series reactor and the capacitor group are connected in series to form a reactive compensation device, which has the following functions:
△Limit or even eliminate the amplification effect of the power reactor group on the system harmonics when the series reactor is not installed; △ Reduce the closing inrush current and inrush current frequency of the capacitor group, which makes it easier to select circuit equipment and protect capacitors;
△Reduce the harmonic voltage value on the busbar to improve the power supply quality;
△Reduce the discharge current value of the healthy capacitor group to the faulty capacitor group to protect the capacitor;
△Reduce the inrush current multiple and frequency when the capacitor group circuit breaker breaks down, so as to facilitate the arc extinguishing of the breaker and reduce the amplitude of the operating overvoltage.