大型机组轴系快控过程的暂态扭振响应分析

汽门快控技术是电气故障发生时，提高系统暂态稳定的经济有效措施。本文以元宝山６００ＭＷ机组为实例，详细分析了系统故障过程中，机组轴系对不同快控操作的扭振暂态响应。结果表明，对不同系统故障采用不同快控操作，在机组轴系激起的扭振暂态过程也不尽相同。在一定条件下，快控汽门加大轴系的扭振响应。为了减少快控汽门冲击对轴系扭振的影响，存在一个合理安排快控时序对故障的匹配问题。本文所得结论，有助于在机组运用快控汽

The Analysis on Transient Response of Large Turbine-Generator Unit Shafts Torsional Vibration During Fast Valving

Fast valving technology is a economy utility treatment to improve the transient stability of power system when electric faults occur. Taken a 600MW unit for example, the transient response of the unit shafts on several fast valving operations during system faults occuring is detailed in this paper. The results show that the transient respones excited by different fast valving operation on different system faults are also different. At one case, fast valving enhances torsional vibration- response, and at the another case the performance is just the opposite. It is necessary to adjust the time sequence of fast valving operation to the faults. The conclusion indicated in this paper is useful to select and make a reasonable fast valving operation scheme.