600MW汽轮机系统建模与控制技术研究

System Modeling and Control of 600MW Steam Turbines

提出一种基于机理知识、运行数据和经验的新型汽轮机机组混合建模方法,利用机组实测运行数据验证所构建的线性动态模型,结果表明该模型具有较高的精度,能够较为准确地刻画机组的瞬态及非线性特性。并以此模型为基础,设计出针对600MW汽轮机机组的新型控制器,仿真结果表明,该控制器具有良好的鲁棒性能,可以使汽轮机机组快速响应电网的波动,有效解决汽轮机逆功率保护及功率控制器调节不足的问题。

Based on mechanism knowledge, operation data and experience, a new hybrid modeling method for steam turbine was proposed. Then, the linear dynamic model was used according to the operation data. The model was proved to possess good accuracy, and have ability to reflect transient and nonlinearity of unit. Moreover, a new controller was designed for the 600 MW steam turbine and its robustness was indicated by the simulation results. With the application of the controller, the power fluctuations can be responded rapidly, the reverse power protection can be avoided as far as possible and regulatory deficiency of power controller can be overcome effectively.