A Review on Protection of Capacitor in Power Quality Industry

In large industry, power factor has become a majorissue in power system. Many industries have been using a capacitor bank for power factor improvement and reactive power compensation. With the use of capacitor bank, disturbance such as inrush current is increased in the system and can cause damage to the capacitor banks and other nearby equipment. This paper aims to study issues in terms of inrush current in the industry and its effect after switching the capacitor bank. The capacitor bank is used in industry for system stability, power factor improvement, and reactive power compensation. To reduce the switching transients of the capacitor bank, pre-insertion resistor technique is used. Most of the industrial loads are nonlinear in nature which aims at lagging power factor. To avoid this problem, capacitor banks are installed in the system. After switching to a capacitor bank, disturbances are increased, thus, the protection scheme is fulfilled for the reliability of the system.