static shunt compensation
DESCRIPTION
TRANSCRIPT
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STATIC SHUNT COMPENSATION
Presented by
T.S.L.V.Ayyarao
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OBJECTIVES OF SHUNT COMPENSATION
Steady-state transmittable power can be increased. Voltage profile can be controlled. Shunt connected reactors (fixed or mechanically
switched) are applied to minimize line over voltage under light load conditions.
Shunt connected capacitors are applied to maintain voltage levels under heavy load conditions.
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MIDPOINT REGULATION FOR LINE SEGMENTATION
Consider two bus transmission model with ideal var compensator at the midpoint.
The compensator divides line into 2 parts.
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MIDPOINT REGULATION FOR LINE SEGMENTATION
Midpoint var compensator exchange only reactive power with the line.
Real power is same at each terminal
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MIDPOINT REGULATION FOR LINE SEGMENTATION
The transmitted power is
The relation between P, Q and angle
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MIDPOINT REGULATION FOR LINE SEGMENTATION
Midpoint shunt compensation significantly increase the transmittable power.
Mid point of the transmission line is the best location for the compensator.
Voltage sag is maximum at the mid point.
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END OF LINE VOLTAGE SUPPORT TO PREVENT VOLTAGE INSTABILITY
Consider a radial Transmission line
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END OF LINE VOLTAGE SUPPORT TO PREVENT VOLTAGE INSTABILITY