最优容错控制与开关控制相结合的再热机组快关控制

A New Fast Valving Scheme for Reheat Turbine-The Coordination of Switch Control and Fault-Tolerant Optimal Control

提出的对中压缸阀门采用开关控制,对高压缸阀门采用最优容错控制的再热汽轮发电机快关控制系统具有以下优越性:（1）中压缸阀门采用开关控制,响应快,易实现,能有效地保证故障后第一摇摆的暂态稳定;（2）高压缸阀门采用最优控制提高了系统阻尼,增加了后摆（包括第二摆）稳定性,并放宽了中压缸阀门开启时间的选取范围;（3）高压缸阀门采用容错控制提高了系统的可靠性。

The fast valving control system of a reheat turbogenerator is proposed in this paper, which adopts switch control in interceptor valve and optimal fault-tolerant control in governing valve and has the following superiorities: (1) The switch control of interceptor valve, which can be realized easily, can quickly respond to the system failure and ensure the transient stability of the first swing; (2) The optimal control of governing valve increases the system damping and stability of later swing (including the second swing), and widens the applicable scope of opening time of interceptor valve; (3) The fault-tolerant design of optimal control increases the reliability of control system.