Suppression of Subsynchronous Resonance Using Thyristor- controlled Series Capacitors
碩士 === 國立成功大學 === 電機工程研究所 === 84 === The thesis presents the analyzed results of the employment of thyristor-controlled series capacitors (TCSC) for damping enhancement of subsynchronous torsional interactions of a power system containing s...
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| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
1996
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| Online Access: | http://ndltd.ncl.edu.tw/handle/98663547983539602168 |
| Summary: | 碩士 === 國立成功大學 === 電機工程研究所 === 84 === The thesis presents the analyzed results of the employment of
thyristor-controlled series capacitors (TCSC) for damping
enhancement of subsynchronous torsional interactions of a power
system containing series-capacitor compensation. The studied
power system consists of two sets of nonidentical turbine-
generators connected to an infinite bus through a common series-
capacitor compensated line. A set of TCSC model is proposed to
properly connected in parallel with part of the series
capacitors of the transmission line. A unified approach based
on modal control theory is utilized to design damping
controllers which employ shaft speed deviation of studied
generators as stabilizing signals. Frequency-domain approach
based on a linearized model and eigenvalue analysis such as
variations of controller's parameters and changes of loading
conditions is performed. Time-domain approach based on
nonlinear model simulation under torque disturbances and a
three-phase fault is also carried out. In addition, the
sinusoidal variations of the infinite bus terminal voltage to
simulate actually loading cyclic variations are also
investigated. The simulation results show that the proposed
TCSC can effectively stabilize subsynchronous torsional
oscillations.
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