电网负荷波动导致调速器工作模式切换原因分析

发布时间：2018-07-07 09:16

本文选题：系统波动 + 调速器　；参考：《人民长江》2017年06期

【摘要】：某大型电站的并网机组多次在电网负荷波动期间发生多台机组调速器工作模式切换,即同时由功率反馈模式切换至开度反馈模式运行,考虑到该电站高水头、长隧洞、大容量引水发电系统的特殊性[1],该运行模式会给机组和电网的安全稳定运行带来风险。为此,开展了分析工作,研究分析认为,造成调速器工作模式切换的原因为调速器功率传感器误报警,为了降低调速器功率传感器在电网负荷波动期间的误报警率,在调速器控制程序中引入频率作为电网负荷波动时防止功率传感器误报警的条件。完善后的程序在被试机组上已经稳定运行了8个月,在此期间,电网负荷发生波动时,再未发生功率传感器误报警及调速器控制模式切换的现象,说明优化完善措施取得了良好的效果。
[Abstract]:During the load fluctuation of power grid, the grid-connected unit of a large power station has several switching modes of governor working mode, that is, switching from power feedback mode to open-degree feedback mode at the same time, considering the high water head and long tunnel of the power station, The particularity of large capacity diversion power system [1], this operation mode will bring risks to the safe and stable operation of unit and power grid. In order to reduce the false alarm rate of the governor power sensor during the load fluctuation of the power grid, the cause of the switch of the governor's working mode is the false alarm of the governor's power sensor, and the analysis shows that the reason for the switch of the governor's working mode is the false alarm rate of the governor's power sensor. The frequency is introduced into the governor control program as the condition to prevent the power sensor from false alarm when the load fluctuation of the power network. The completed program has been running steadily for 8 months on the tested unit. During this period, when the load of the power network fluctuates, there is no phenomenon of power sensor false alarm and governor control mode switching. It shows that the optimization and improvement measures have achieved good results.
【作者单位】：雅砻江流域水电开发有限公司锦屏水力发电厂;
【分类号】：TV734.4

【相似文献】