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The impact of recloser transients on Fierza HPP generators

机译：REGLOSER瞬变对Fierza HPP发电机的影响

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Power system networks are subject to various forms of transients. Various studies have shown that 70–90 % of the faults occurred in overhead lines are transient. Therefore the overhead lines beside relay protection are equipped with recloser, in order to identify the transient faults. When a fault occurs in the network, turbine-generators experience a step change in torque. The fault clearing produces a second step change usually in the opposite direction. This second shock can reinforce oscillations. Unsuccessful reclosing events coupled with low damping for shaft oscillations would provide more opportunities for further amplification. During the rehabilitation work of Fierza HPP, damages have been reported at the shaft of turbine-generator. This experience has aroused our interest in transient shaft torque oscillations leading to a more detailed analysis of the effects of short circuit and line switching transients was performed. In this paper are presented and discussed the representative results of the transient analyses during simulation of reclosers' operation. Simulations are performed using ATP software.
机译：电力系统网络受各种形式的瞬态。各种研究表明，70-90％的架空线发生故障是瞬态的。因此，继电器保护旁边的架空线配备有重闭合器，以识别瞬态断层。当网络中发生故障时，涡轮发电机会经历扭矩的步骤变化。故障清除通常在相反方向上产生第二步变化。这个第二次震动可以加强振荡。与轴振荡的低阻尼相结合的不成功的闭合事件将为进一步扩增提供更多机会。在Fierza HPP的康复工作期间，涡轮发电机轴报告了损坏。这种经验引起了我们对瞬态轴扭矩振荡的兴趣，导致对短路和线路开关瞬变的效果进行更详细的分析。本文介绍并讨论了在旋转器操作的模拟期间瞬态分析的代表性结果。使用ATP软件执行模拟。

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