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现场总线电动执行机构在高强电磁场环境的研究和应用
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作者 方运涛 刘柯楠 《中国仪器仪表》 2024年第5期55-59,共5页
铝电解厂烟气脱硫生产过程处于高强电磁场环境中,生产控制需要使用的电动执行机构数量多且相对位置分散。根据造价和现场总线电动执行机构的优势以及特点,采用防磁设计技术后首次采用现场总线方式接入PLC控制系统。实施后,相较电动执行... 铝电解厂烟气脱硫生产过程处于高强电磁场环境中,生产控制需要使用的电动执行机构数量多且相对位置分散。根据造价和现场总线电动执行机构的优势以及特点,采用防磁设计技术后首次采用现场总线方式接入PLC控制系统。实施后,相较电动执行机构硬接线方式接入控制系统具有控制简便,控制信息精确,造价成本低,施工比例,安装材料节省,维护便捷等优点,具体较大的推广价值。 展开更多
关键词 现场总线 电动执行机构 高强电磁场 防磁设计 电解烟气脱硫
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Safe Distance for Inspection of 1 000 kV UHVAC Lines with Helicopter
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作者 Shen Jian Liu Weidong +2 位作者 Liu Hongbin Wang Jun Wu Yi 《Electricity》 2012年第1期21-25,共5页
Helicopter inspection of ultra high voltage (UHV) transmission lines has unmatched advantages compared to manual work due to the inspection angle and high-tech equipment on board, especially in detailed inspections ... Helicopter inspection of ultra high voltage (UHV) transmission lines has unmatched advantages compared to manual work due to the inspection angle and high-tech equipment on board, especially in detailed inspections of tower heads and defect-detections in virtue of infrared/ultraviolet techniques. This paper deals with some key technical problems in the inspections of i 000 kV UHVAC lines with a helicopter, such as the safe distance of live-line working, electromagnetic field intensity and flight control. Based on the study results, a set of UHV line inspection methods was worked out and applied to the inspection of live UHV lines. 展开更多
关键词 transmission line helicopter patrol safe distance electromagnetic field simulation
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