超超临界机组的AGC技术研究

Research on AGC technology of Ultra Supercritical Unit

对改善超超临界机组自动发电控制的关键技术进行了总结,主要包括滑压曲线的针对性优化、过热度函数曲线的修正、水煤比的动态控制、风煤比的调整、风粉比的精细控制、减温水与给水比例的掌握、一次风与二次风流量的配比等;同时,针对机组AGC运行方式下主汽压力响应速度慢的问题,给出了变负荷前馈使用、增加磨煤机一次风量的前馈、一次风母管压力设定等实际可行的解决办法。

This paper su mmarizes the key technologies to improve the automatic generation control of ultra supercritical units,including the targeted optimization of the sliding pressure curve,the correction of the superheat function curve,the dynamic control of the water coal ratio,the adjustment of the air coal ratio,the fine control of the air powder ratio,the mastery of the ratio of desuperheating water to water supply,the ratio of primary air to secondary air flow,etc.Aiming at the problem of slow response speed of the main steam pressure in the AGC operation mode of the unit,this paper provides practical solutions such as variable load feedforward use,increasing the primary air volume feedforward of the coal mill,and setting the primary air duct pressure.