【摘要】 电机在运行中,发电机氢气湿度是一项重要的监测指标,氢气湿度是否在规定范围内直接影响着机组的安全运行。过于干燥的环境会对发电机定子的某些部件产生有害的影响,造成端部垫块收缩和支撑环裂纹,将导致定子端部绝缘发生磨损。湿度过高,水汽在氢气温度过低时会产生结露,降低发电机绝缘,可能进一步造成发电机故障。氢气湿度的变化与密封油、除湿装置等系统的运行质量息息相关,因此对氢气湿度的控制也主要从上述系统着手。更多还原

【Abstract】 With the increasing large-scale and multifunctional trend of high-rise buildings,the monitoring and management for buildings by taking full advantage of control and communication technologies has become the technical and material conditions that the modern high-rise buildings must possess.This paper summarizes the B&R’s facing future Intelligent Building Automation Sytem(IBAS),introduces the composition,architecture,main functions and characteristics of the system with emphasis on the detailed descriptions of the superiorities and con? guration of the PCC and its communication networks,which constitutes the master control system of IBAS.It adopts a brand-new idea of facing future from the design philosophy to the software and hardware con? gurations in the system,fully embodies the fundamental principle of reliable,intelligent,energy-saving and cozy.更多还原