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首页> 外文期刊>IEEE Transactions on Power Systems >Torsional oscillations of unequally-loaded parallel identical turbine-generators
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Torsional oscillations of unequally-loaded parallel identical turbine-generators

机译：不等负载并联同等涡轮发电机的扭振

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摘要

The phenomenon of torsional oscillations of closely coupled parallel identical turbine-generator (T-G) units under unequal loading conditions is studied, and the damping effect of an SVC system on the torsional oscillations of the T-G sets is investigated. An eigenvalue method is used for the studies, and the results are verified by detailed digital computer simulation, using the electromagnetic transients program. It is shown that, under unequal loading conditions, the corresponding torsional oscillations of parallel identical T-G sets are not in-phase. The phase deviation depends on the difference in the output powers of the generators and the mechanical damping torques. As a result of the phase-deviation, the SVC system which utilizes the speed(s) of one of the T-G sets as the torsional stabilizing signal(s) may provide inadequate damping or even cause further excitation of the torsional modes of the other T-G sets. Comparisons of the results with those obtained based on representing the T-G sets by the equivalent-generator model indicate that this model is not a valid representation of unequally loaded parallel identical T-G sets.
机译：研究了在不相等载荷条件下，紧密耦合的并联同等涡轮发电机的扭振现象，研究了SVC系统对T-G机组扭振的阻尼作用。研究采用特征值方法，并使用电磁瞬变程序通过详细的数字计算机仿真验证了结果。结果表明，在不相等的载荷条件下，平行的相同T-G组的相应扭转振动不是同相的。相位偏差取决于发电机输出功率和机械阻尼转矩的差异。由于相位偏差，利用TG组之一的速度作为扭转稳定信号的SVC系统可能会提供不足的阻尼，甚至会进一步激发另一个TG的扭转模式套。将结果与等效发电机模型基于表示T-G集获得的结果进行比较，结果表明该模型不是等效载荷平行T-G集的有效表示。

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