Abstract
An application of a thyristor controlled thermoelectric converter (TCTEC) to a power system is proposed. The purpose of using a TCTEC is basically for electric power generation in the normal operating phase; however, such a device will also improve transient stability. Owing to the EMF caused by the Seebeck effect acting to enhance power dissipation in the thermoelectric semiconductor resistance, a TCTEC can act as a power compensator during upswings and downswings with the help of feedback control. The performance of a TCTEC is superior to that of the conventional braking resistor in absorbing power during the voltage drop on the machine terminal bus. The effectiveness of a TCTEC was tested on a two-machine infinite-bus system with a digital computer. The simulation results show that a TCTEC with a rotor relative angular velocity feedback channel improves not only the first-swing stability, but also plays a very important role in providing damping and assuring stability throughout subsequent swings.
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