基于AGC负荷指令优化分解的火电机组蓄能综合利用

Optimized Decomposition of AGC Load Command for Comprehensive Utilization of Energy Storage in the Thermal Power Unit

对于利用单一蓄能难以提升火电机组变负荷速率的情况,综合利用凝结水节流调节和冷却工质节流调节2种快速变负荷方式改善火电机组变负荷性能。确定了凝结水节流调节功率增量范围、凝结水节流调节持续时间以及冷却工质节流调节功率增量范围;在保证机组安全运行的情况下,对传统的自动增益控制(AGC)负荷指令分解方式进行改进,并对分解后的负荷指令进行优化。结果表明:所设计的系统在保证机组安全运行的前提下,具有很好的变负荷效果,提升了机组整体的变负荷速率,实现了火电机组不同蓄能间的合理高效利用。

As it is difficult to increase the variable load rate of a thermal power unit using single energy storage,the comprehensive utilization of two types of rapid load change such as condensate throttling regulation and coolant throttling regulation was used to improve its rapid load change.The power increment range and duration of condensate throttling regulation and power increment range of coolant throttling regulation were determined.With the premise of safe unit operation,the improvement of traditional AGC load command decomposition was performed,and the decomposed load command was optimized.Results show that the designed system has a good load change effect with the premise of safe unit operation,which improves its overall load change speed and realizes the reasonable and efficient utilization between different types of energy storage in the thermal power unit.