Shunt and Series compensation

[electrics]

Hi what are the main differences between these two, and how a difference makes the position of the capacitance with respect to the load or source?

 

[Hameedulla-Ekhlas]

The compensation equipment is necessary for voltage control

Series Capacitors are sometimes installed in series in distribution substations, receiving substations for improvement of power factor.

Shunt capacitor are switched on during high inductive loads. They are switched off during low loads. Shunt capacitors are also included in static VAR sources (SVS)

Shunt Reactors are necessary with long EHV transmission lines to copensate the reactive power of the line capacitance during low loads.

Static VAR Sources(SVS): These are thyristor controlled shunt capacitors and shunt reactors which give rapid, stepless control of reactive power (VAR). These are connected in receiving stations and distibution sytsems

or we can say

Shunt reactor : to provide reactive power compensation during low loads.
Series Reactor: To reduce the short circuit current or starting currents
Shunt capacitors: To povide compensations to reacive loads of lagging power factor

Series Capacitors: Compensation of long lines