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本文利用现代控制理论的方法,推导建立了一次调节抽汽式汽轮机调节系统的自整条件,并通过计算机仿真试验证明了自整条件的正确性。结果说明:只要满足静态自整和第一动态自整(即电负荷变化对热负荷没有影响),即可认为满足了全面自整。此时,不仅能消除电负荷与热负荷之间的相互干扰,而且消除了甩电负荷之后可能出现的反调,减小了动态超速,增加了机组的安全性;对于国内的典型系统,在不改变系统总体结构的条件下,也能实现动态自整的要求,对系统的设计和改进有一定的指导作用。
In this paper, we use the modern control theory method to derive a self-tuning condition for adjusting the regulation system of extraction steam turbine, and prove the correctness of self-tuning condition through computer simulation. The results show that as long as the static self-tuning and the first dynamic self-tuning (that is, the change of the electric load has no effect on the heat load), the full-scale self-tuning can be considered. In this case, it can not only eliminate the mutual interference between electric load and thermal load, but also eliminate the possible anti-tuning after the electric load is thrown off, reducing the dynamic speeding and increasing the safety of the unit. For a typical domestic system, Change the overall structure of the system under the conditions, but also to achieve the requirements of dynamic self-tuning, the system design and improvement have a guiding role.