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Rotor Angle Stability

Rotor Angle Stability

Rotor Angle Stability

(OP)
A fault on the system causes rotor angle swings between connected generators, which is dependent on power mismatch, inertia and the time of fault clearance.

In such cases the relative rotor angle differences between these sets are analysed or calculated using softwares. Associated with the rotor angle variation between sets are active MW power swings between generators causing a large instantaneous plus to minus MW or torque swing on the generator/turbine shaft, causing rotor shaft distortion or breakage.

Would appreciate if somebody could let me know the maximum torque of MW swing i.e instantaneous +Ve to -Ve power swing that a turbine ( Steam & Gas Turbine ) can tolerate without causing shear or damage to turbine / generator shaft.

RE: Rotor Angle Stability


The maximum torque settings are +- 10 % of the rated torque of the generator . This is as per the Westinghouse manual(edition 1963).

Roopinder
rplc@lycos.com

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