负荷扰动下直流蒸汽发生器蒸汽压力控制仿真

Simulation research on pressure control of main steam in once through steam generator load disturbance

对采用直流蒸汽发生器的船用核动力装置,为保证快速大幅度负荷变动时的装置运行安全,采用了一、二回路功率协调控制系统。但由于直流蒸汽发生器物理过程的复杂性和一、二回路功率协调控制系统的不完善,在一般负荷扰动时,仍会出现主蒸汽系统压力较大幅度的波动,影响汽动设备的稳定运行。因此,运行上仍需进一步对主蒸汽系统的压力波动范围进行限制。本文以采用直流蒸汽发生器的核动力商船动力装置为研究对象,研究利用装置的启停蒸汽冷却器参与主蒸汽压力运行控制,并建立运行仿真模型进行仿真试验研究。结果表明,启停蒸汽冷却器参与装置运行后能有效调节主蒸汽压力,降低其压力波动峰值。

In order to ensure the security of marine nuclear power plant,the plant with once through steam generator（ OTSG） adopts power coordinated system between the primary loop and the two loop when the load fluctuating wildly. However, the load disturbance by two-loop system would induce substantial pressure fluctuations in main steam system influencing stable operation of steam-driven equipments, because of the complexity of the physical process in OTSG and the defect of power coordinated system. So, it is necessary to control the range of pressure fluctuations. The paper focuses on the topics of the marine nuclear power plant with OTSG and establishes the simulation model to study how to control the pressure of marine steam using the start-up steam condenser. The result shows that the start-up steam condenser could control pressure and reduce the peak value of pressure fluctuations in OTSG.