Hydro Turbine Generator Units
Home >> CTSS Products >> Power Transmission >> Reactor
Shunt Reactor
|
|
 |
Shunt Reactor Product Details：
General:
The most common type of failure in electric power systems is the single-phase to ground fault. It is the reason for up to 80% of all disturbances on high voltage systems. Significant improvement in power quality is achieved through the reduction of power outages by operating a network as a resonant grounded system (also known as a compensated system) by connecting the system’s neutral to ground through one or more high impedance devices. By utilizing an iron core reactor (Arc Suppression Coil (ASC), also known as Petersen Coil), which is tuned to the total system capacitance to ground, the original capacitive fault current (up to a few 100 A) is compensated by the inductive current of the ASC.
Two type of shunt reactors are manufactured: With iron core divided by air gaps and Without iron core, with magnetic return circuit
Standards:
Ø IEC60076-4: Power Transformer and Reactors
Ø IEC 62041-2003 Power Transformer, Power Supply Units Reactors and Similar Pproducts-EMC Requirements
Features:
Ø Essentially lower ground fault currents when compared to resistor grounded or isolated systems
Ø Minimization of dangerous effects to personnel and equipment
Ø Reduces risk of re-strike and intermittent ground faults
Ø The majority (up to 80%) of single-phase to ground faults are self-healing and hence do not cause any interruptions in power supply
Ø For the remaining low number of permanent ground faults, uninterrupted service during fault conditions is allowed, therefore unscheduled power outages are minimized
Application:
Ø Compensation of capacitive reactance of transmission cables, in particular in networks with light or no load.
Ø Reduction of system-frequency over voltages when a sudden load drop or no load occurs.
Ø Improvement of the stability and efficiency of energy transmission.
