1000 MW二次再热机组汽轮机冷态启动冲转参数优化

Optimization on Cold Start-up Rotation-impulsing Parameters of a 1 000 MW Double Reheat Steam Turbine

为解决某二次再热机组汽轮机冷态启动低速暖机时中压调节阀振动大的问题,对机组冷态启动蒸汽参数进行了分析和优化。通过降低蒸汽参数取得了比较好的效果,缩短了机组低速暖机时间和并网时间,提高了机组运行的安全性和稳定性。

To solve the problem of severe vibration occurring in the medium-pressure regulating valve during low-speed warm-up process in the start-up of a double reheat steam turbine,analysis and optimization were conducted on the steam parameters for cold start-up of the unit.Better effectiveness could be obtained for the unit by lowering the steam parameters,when both the warm-up and the grid-connection time are reduced,while the operation safety and stability of the unit are improved.