On the basis of the BP neutral net work method,method for calculating the real-time maximum adj ustable load for thermal power units was presented.Through analysis on related op-eration parameters such as pulverizing system capacity,heating surface temperature,main steam pressure,feedwater flow rate,turbine vibration and auxiliary equipment performance,this method can ascertain the real-time maximum adj ustable unit load.According to the relativity between the maximum adj ustable loads during different periods and the unit parameters at the same period,the obtained unit load margin not only can guide the operation optimization,but also can help the power grid regulate the unit load in time.%基于BP神经网络给出了计算火电机组实时最大可调负荷的方法，该方法可通过对近期机组制粉系统出力、锅炉受热面温度、主蒸汽压力、给水流量、汽轮机振动及辅机性能等相关运行参数的分析，得到机组实时可调最大负荷。根据机组不同时段最大可调负荷与同时段机组运行参数的相关性，计算得到的机组负荷裕度不仅可以指导机组的优化运行，而且可使电网及时调整各机组负荷。
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