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Transient stability of a large doubly-fed induction machine in a pumped-storage plant

机译：抽水蓄能电站中大型双馈感应电机的暂态稳定性

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摘要

In recent years, the doubly-fed induction machine (DFIM) has become one of the most commonly used generators, especially for wind-power plants. The second field where DFIMs have a clear advantage over "classic" generators is their application in hydro pumped-storage plants, where larger units are employed. This paper addresses the transient-stability problem associated with DFIMs. In order to be able to understand the machine's behavior at an engineering level, the currents and magnetic fluxes during the transients, as well as the oscillations of the rotor speed and the power after the fault, are analyzed. The results of the analysis show that the resistance of the so-called "crowbar protection" is of vital importance for power- and speed-oscillation damping as well as for maintaining the system's transient stability. Therefore, optimization of the crowbar-protection resistance should be performed prior to the installation of a large DFIM in a relatively weak grid. (C) 2016 Elsevier B.V. All rights reserved.
机译：近年来，双馈感应电机（DFIM）已成为最常用的发电机之一，尤其是对于风力发电厂。 DFIM相对于“经典”发电机具有明显优势的第二个领域是它们在采用大型机组的水力抽水蓄能电站中的应用。本文解决了与DFIM相关的瞬态稳定性问题。为了能够在工程水平上了解电机的性能，分析了瞬态过程中的电流和磁通量以及故障后转子速度和功率的振荡。分析结果表明，所谓的“撬棍保护”的电阻对于功率和速度振荡阻尼以及维持系统的瞬态稳定性至关重要。因此，在将较大的DFIM安装在相对较弱的网格中之前，应先对撬棍保护电阻进行优化。 （C）2016 Elsevier B.V.保留所有权利。

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