- The shunt reactors are used to compensate reactive power generation in high voltage transmission lines and cable systems.
- They are permanently used to stabilize power transmission line under light load conditions.
- There is a capacitance between transmission lines and earth.
- The reactive power is generated due to these capacitance.
- The reactive power should be balance to reduce energy losses therefore the shunt reactor increases energy efficiency of the transmission lines.
- The voltage of the transmission lines increases at light load.
- A Shunt reactor reduces the voltage, keep the voltage within desirable limits therefore it provides voltage stability.
Variable Load Conditions
- The load on the transmission line is continuous variable.
- The variable shunt reactor ( VSR ) continuously provides reactive power compensation.
- The variable reactor is used in the Grid system.
- It provides to improve voltage stability and power quality.
Cable
- The cable generates more reactive power than overhead lines therefore the shunt reactive power is more importance in the transmitting active power through cable.
Renewable Energy Sources
- The wind power and solar energy generates unpredictable and fluctuating active power.
- The variable shunt reactors provide compensation of these power variations.
Auxiliary Power
- When a secondary winding is added to shunt reactor, it provides several MVA of power in remote areas.
- The shunt reactor provides power to remote villages located close to sub stations without using high voltage step down transformer.
Reserve
- A variable shunt reactor ( VSR ) can be sued as a flexible reserve in different locations in large transmission lines.
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