In order to obtain the transient characteristics of a low-speed centrifugal pump during the start-up and shutdown stages,dedicated experimental tests were conducted with eight different valve opening conditions.The Pe...In order to obtain the transient characteristics of a low-speed centrifugal pump during the start-up and shutdown stages,dedicated experimental tests were conducted with eight different valve opening conditions.The Pearson correlation coefficient was used to reveal the linear correlation between variables.According to the results,the stable rotational speed decreases with increasing valve opening(rotational speed decreases from approximately 1472 to 1453 r/min),while the stable shaft power exhibits an increasing trend(shaft power increases from approximately 0.242 to 0.390 kW).The stable time and zeroing time of each parameter during start-up and shutdown processes vary,with the flow zeroing time significantly increasing with the relative flow,reaching up to 10.468 s,while the shaft power zeroing time is roughly between 1.219 and 1.375 s.The results demonstrate that with increasing valve opening,the stable and zeroing time of flow significantly increase(|r|greater than 0.95),while the stable and zeroing time of rotational speed,power,and head display a smaller sensitivity on the valve opening(|r|less than 0.6).展开更多
某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升...某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升级改造,从而降低了运行人员的工作强度,减少误操作,对机组长期的安全稳定运行有重大意义。本文围绕某电厂安萨尔多AE94.3A联合循环机组自动启停技术项目的实施,介绍了自动启停技术整体设计框架,并对各功能断点进行了分层解析,最终对项目碰到的难点进行分析,提出了解决方案。展开更多
基金supported by Science and Technology Project of Quzhou(Grant Nos.2023K256,2023NC08)Zhejiang Provincial Natural Science Foundation of China(Grant No.LZY21E050001)Hunan Province Key Field R&D Plan Project(Grant No.2022GK2068).
文摘In order to obtain the transient characteristics of a low-speed centrifugal pump during the start-up and shutdown stages,dedicated experimental tests were conducted with eight different valve opening conditions.The Pearson correlation coefficient was used to reveal the linear correlation between variables.According to the results,the stable rotational speed decreases with increasing valve opening(rotational speed decreases from approximately 1472 to 1453 r/min),while the stable shaft power exhibits an increasing trend(shaft power increases from approximately 0.242 to 0.390 kW).The stable time and zeroing time of each parameter during start-up and shutdown processes vary,with the flow zeroing time significantly increasing with the relative flow,reaching up to 10.468 s,while the shaft power zeroing time is roughly between 1.219 and 1.375 s.The results demonstrate that with increasing valve opening,the stable and zeroing time of flow significantly increase(|r|greater than 0.95),while the stable and zeroing time of rotational speed,power,and head display a smaller sensitivity on the valve opening(|r|less than 0.6).
文摘某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升级改造,从而降低了运行人员的工作强度,减少误操作,对机组长期的安全稳定运行有重大意义。本文围绕某电厂安萨尔多AE94.3A联合循环机组自动启停技术项目的实施,介绍了自动启停技术整体设计框架,并对各功能断点进行了分层解析,最终对项目碰到的难点进行分析,提出了解决方案。
