此系统为三冲量调节回路。通过采用给水流量(FT101)、蒸汽流量(FT103)和汽包水位(LT102)主信号一起对给水调节阀(LV102)进行PI调节,使汽包水位保持在设定范围内,以适应锅炉的蒸发量。
此系统为条件切换输出调节回路。正常发电时,利用汽轮机与旁路系统平衡配置,通过汽轮机同步控制器调速汽门来调节主汽门前压力(PT302),使其稳定在工作压力左右。当发电机甩负荷时,控制旁路蒸汽调节阀(PV302),退出自动状态。
此系统为条件切换输出调节回路。在低负荷状态时,本调节系统通过调节蒸汽旁路调节阀(HV302)来维持减温减压器后压力(PT325),使其稳定在设定工作范围。当处于甩负荷状态时,调节系统来调节蒸汽调节阀(PV325)。
此系统为双调节器条件切换单输出回路。低压分汽缸的蒸汽:在正常发电模式下来自汽轮机的抽汽;当发电机处于甩负荷状态或汽轮机故障状态时,则来自于主蒸汽经减温减压器后的一部分蒸汽(而另一部分蒸汽则进入高压冷凝器)。本调节系统根据系统要求,通过调节蒸汽调节阀来安全合理的分配这两部分蒸汽。
当高压蒸汽冷凝器的压力(PT327)小于0.2Mpa时,调节系统通过调节蒸汽调节阀(PV326)来维持低压分汽缸压力(PT326),使其稳定在设定工作范围。当高压蒸汽冷凝器的压力(PT327)大于0.2Mpa时,调节系统通过调节蒸汽调节阀(PV326)来维持高压蒸汽冷凝器的压力(PT327),使其稳定在设定工作范围。
此系统为条件切换输出调节回路。正常发电模式时,大量的凝结水由凝汽器通过低加直接送回到除氧器,不通过蔬水箱,除氧器的补给水通过调节进水调节阀(LV304_1),实现除氧器液位(LT404)的恒定。当汽轮机故障状态时,大量的凝结水从高压冷凝器聚到蔬水箱,除氧器的补给水则通过蔬水箱输送,除氧器液位(LT404)通过调节进水调节阀(LV304_2),实现液位的恒定。
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