Shunt capacitor devices are composed by capacitor bank

series reactor and other supporting devices.The main structure of its circuit model is series loop of capacitance and inductance.The impedance of capacitor cell and inductance components varies with frequency

thus exists a definite influence on harmonic flow when the shunt capacitor device is connected in the electric system.Meanwhile

the capacitor device itself is also affected by the harmonic in the system.This article analyzes the mutual influence between system harmonic and capacitor device of difference parameter by way of basic theory of electric circuit.It is known through analysis that the change of parameter of system or shunt capacitor bank has different influence such as enlargement

suppression or filtering etc on system harmonic.So we should consider fully about the quality of electric energy of switch on point and system parameter when we design the shunt capacitor device

and choose the right parameter after a comprehensive assessment.