Shunt capacitors are connected in parallel to the system bus, similar to a capacitive load on the system bus, which absorbs the capacitive reactive power of the system, which is equivalent to the shunt capacitor sending inductive reactive power to the system. Therefore, shunt capacitor can provide inductive reactive power to the system, the power factor of system operation, improve the voltage level of the bus at the receiving end, at the same time, it reduces the delivery of inductive reactive power on the line, reduces the voltage and power loss, and thus improves the transmission capacity of the line.

Self-healing shunt capacitor is a form of capacitor with self-healing functions such as voltage relief, explosion-proof, compact structure and mature technology.