扩建增容引水式水电站运行的安全稳定性分析

Analysis on operation safety and stability for diversion-type hydropower station after extension

为了充分利用水能资源和优化水电站的运行方式,对已建大中型水电站进行扩建增容日益成为水电能源开发的重要方式之一。在扩建增容的引水式水电站运行中,其增容机组和原设机组运行的安全稳定性以及相互的水力影响是其中的主要问题。基于综合有压管道特征线法和状态方程分析的联合算法,着重研究扩建增容引水式水电站的大波动、小扰动和水力干扰稳定性问题,并且结合实际算例作具体分析,为类似电站增容方案的设计和安全稳定运行提供可靠的依据。

In order to utilize water resources sufficiently and optimize the operation mode, extension for the large and medium sized hydropower stations to increase their capacities becomes one of the important developing ways. For the operation of the diversion-type hydropower station after extension, the main problem comes from the safe and stable operations of both the extended generating units and the original ones and the hydraulic influence of their interaction therein. Based on a algorithm integrated by the method of characteristics for the pressurized pipeline and the analysis with the state equations, the stabilities during the transient processes of large fluctuation, tiny fluctuation and hydraulic disturbance for the hydropower station after extension are emphatically analyzed herein, and then a reliable basis for the design and the safe operation of the similar hydropower stations is given incorporated with the specific analysis made on the actual as well.