Objectives of shunt compensation
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Objectives of shunt compensation

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Objectives of shunt compensation Objectives of shunt compensation Presentation Transcript

  • STATIC SHUNT COMPENSATIONPresented byT.S.L.V.Ayyarao1
  • OBJECTIVES OF SHUNT COMPENSATION Steady-state transmittable power can be increased. Voltage profile can be controlled. Shunt connected reactors (fixed or mechanicallyswitched) are applied to minimize line over voltageunder light load conditions. Shunt connected capacitors are applied to maintainvoltage levels under heavy load conditions.2
  • MIDPOINT REGULATION FOR LINESEGMENTATION Consider two bus transmission model with ideal varcompensator at the midpoint. The compensator divides line into 2 parts.3
  • MIDPOINT REGULATION FOR LINESEGMENTATION Midpoint var compensator exchange only reactivepower with the line. Real power is same at each terminal4
  • MIDPOINT REGULATION FOR LINESEGMENTATION The transmitted power is The relation between P, Q and angle5
  • MIDPOINT REGULATION FOR LINESEGMENTATION Midpoint shunt compensation significantly increasethe transmittable power. Mid point of the transmission line is the bestlocation for the compensator. Voltage sag is maximum at the mid point.6
  • END OF LINE VOLTAGE SUPPORT TO PREVENTVOLTAGE INSTABILITY Consider a radial Transmission line7
  • END OF LINE VOLTAGE SUPPORT TO PREVENTVOLTAGE INSTABILITY8
  • END OF LINE VOLTAGE SUPPORT TO PREVENTVOLTAGE INSTABILITY Reactive shunt compensation can effectivelyincrease the voltage stability limit and regulates theterminal voltage. End of the line is the best location for compensator.9
  • IMPROVEMENT OF TRANSIENT STABILITY10
  • IMPROVEMENT OF TRANSIENT STABILITY11
  • IMPROVEMENT OF TRANSIENT STABILITY12
  • POWER OSCILLATION DAMPING13