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发电机并列运行
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  “发电机并列运行”译为未确定词的双语例句
    Technical Measures for Parallel Running of Shunt-Excited Generators with Double-Wound Reactor
    双绕组电抗器分流励磁发电机并列运行的技术措施
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As parallel running of shunt-excited generators with double-wound reactor,a serious oscillation problem is faced. Based on practice the author suggests the following technical measures: decreasing the exciting component due to current source, and reducing the positive feedback intensity of excitation; increasing the exciting component due to voltage source to make up for the deercase of exciting component due to current source; making the exciting component due to voltage source to be adjustable.

双绕组电抗器分流励磁发电机并列运行时会出现严重的振荡问题。作者结合实践提出了解决方法:减小电流源的励磁分量,降低励磁正反馈强度;电流源减小的励磁分量用增大电压源的励磁分量来弥补;使电压源的励磁分量可调。

In the Fuergang hydropower station, there happened a violent reactive power oscillation when the small reactor-starting generator was put into operating with the large generator. For overcoming this trouble, the reactor's windings were reconnected after the subwinding phase shifted 120°clockwise and the tap of mainwinding shifted near the neutral point.In addition,a two-way switch was installed in the excitation circuit. Thence, the oscillation disappeared, and the generators can be operated on various mode.

长葛市佛耳岗水库水电站电抗分流式发电机并列运行时,出现剧烈无功振荡。采用副绕组顺转120°接电抗器,改变抽头位置,增设双投开关,解决了振荡问题,给电站提供了多种运行方式。

Turbo-generator stator's inter-turn short circuit is a usual serious internal fault and difficult to be found,for which the protection is in poor performance at present.On-line monitoring generator's operation condition combined with intelligence is presented to identify the fault in time to avoid accident.The positive sequence and negative sequence currents of the fault phase are analyzed,the mathematical model of stable fault character of stator winding's inter-turn short circuit are built.An Elman neural...

Turbo-generator stator's inter-turn short circuit is a usual serious internal fault and difficult to be found,for which the protection is in poor performance at present.On-line monitoring generator's operation condition combined with intelligence is presented to identify the fault in time to avoid accident.The positive sequence and negative sequence currents of the fault phase are analyzed,the mathematical model of stable fault character of stator winding's inter-turn short circuit are built.An Elman neural network for dynamic data in real time is introduced to identify the fault.General parameters of a large turbo-generator are used for calculating its stable fault characters during occurrence of stator winding's inter-turn short circuit in operation.Results indicate that the Elman network could efficiently identify generator stator's inter-turn short circuit based on rational fault characters.This way is also fit for offer reference for the protection action.

汽轮发电机定子绕组匝间短路是很难及时发现且破坏性很强的内部故障,目前的针对性保护动作正确率普遍偏低,为此提出了结合故障特征量与智能技术的匝间短路在线识别。分析了匝间短路过程中故障相正序电流的变化和负序电流的产生作为特征量的依据,建立其稳态下的数学模型后介绍了特征数据经动态Elman神经网络进行在线智能识别的方法。基于复合序网对一台大型汽轮发电机并列运行时匝间短路的故障量进行计算,将特征数据输入神经网络进行识别。研究结果表明,合理的在线故障特征组合,匝间短路可以被Elman网络及时发现。该思路也可以作为保护动作前的参考信息。

 
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