The characteristics and distribution law of electromagnetic environment around substations with different levels of voltage were studied,and the main influencing factors were discussed. Meanwhile,a scheme for locating...The characteristics and distribution law of electromagnetic environment around substations with different levels of voltage were studied,and the main influencing factors were discussed. Meanwhile,a scheme for locating monitoring points suitable for an on-line monitoring system of electromagnetic environment was proposed.展开更多
Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home a...Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home and abroad were introduced.Moreover,the problems existing in the on-line monitoring of electromagnetic environment were expounded,and the development prospect was forecasted.展开更多
With the acceleration of urbanization and increase of points in power systems,complaints about power grids have increased.In the actual on-site measurement process,although the actual measurement results can meet the ...With the acceleration of urbanization and increase of points in power systems,complaints about power grids have increased.In the actual on-site measurement process,although the actual measurement results can meet the relevant standards,some people are still concerned that the electromagnetic environment may change drastically outside the measurement period,which will have an impact on human health.In this study,the situation of electromagnetic online monitoring systems at home and abroad was introduced firstly,and then some practical requirements for establishing monitoring stations were analyzed.According to existing technologies and related writings,the methods and steps for establishing a quality assurance system were introduced,including the identification of quality assurance system activities and their corresponding structure of quality assurance system documents,the preparation and principles of the documents,and the operation of the quality assurance system.It intends to provide reference for the relevant organizations and personnel conducting electromagnetic environment monitoring when establishing a quality assurance system.Through the establishment of the online monitoring system and the later data publicity,the public have an intuitive understanding of the electromagnetic environment attenuation around power transmission and transformation projects,which can not only make China's electric power industry develop better,but also monitor the unexpected situation in time,maintain public safety and reduce people's fear of electromagnetic radiation in substations.展开更多
Flame spread behaviors and temperature rise of fuel surface were experimentally investigated. A series of tests on aviation kerosene pool fires were conducted by using the schlieren image system, micro-thermocouple an...Flame spread behaviors and temperature rise of fuel surface were experimentally investigated. A series of tests on aviation kerosene pool fires were conducted by using the schlieren image system, micro-thermocouple and infrared thermal imager. The velocity evolutions of flame spread and surface flow under different initial fuel temperatures were discussed. The characteristics of fuel surface temperature rise were revealed, and it was found that the preheating effect of surface flow on fuel decreased with increasing initial fuel temperature.展开更多
基金Supported by the Open Project of Jiangsu Key Laboratory of Environmental Engineering(ZX2017005)
文摘The characteristics and distribution law of electromagnetic environment around substations with different levels of voltage were studied,and the main influencing factors were discussed. Meanwhile,a scheme for locating monitoring points suitable for an on-line monitoring system of electromagnetic environment was proposed.
基金Supported by the Open Project of Jiangsu Key Laboratory of Environmental Engineering(ZX2017005)
文摘Based on the collection of relevant literature and cases,the research and application status of on-line monitoring technology for electromagnetic environment of power transmission and transformation projects at home and abroad were introduced.Moreover,the problems existing in the on-line monitoring of electromagnetic environment were expounded,and the development prospect was forecasted.
基金Supported by the Open Project of Jiangsu Key Laboratory of Environmental Engineering(ZX2017005)
文摘With the acceleration of urbanization and increase of points in power systems,complaints about power grids have increased.In the actual on-site measurement process,although the actual measurement results can meet the relevant standards,some people are still concerned that the electromagnetic environment may change drastically outside the measurement period,which will have an impact on human health.In this study,the situation of electromagnetic online monitoring systems at home and abroad was introduced firstly,and then some practical requirements for establishing monitoring stations were analyzed.According to existing technologies and related writings,the methods and steps for establishing a quality assurance system were introduced,including the identification of quality assurance system activities and their corresponding structure of quality assurance system documents,the preparation and principles of the documents,and the operation of the quality assurance system.It intends to provide reference for the relevant organizations and personnel conducting electromagnetic environment monitoring when establishing a quality assurance system.Through the establishment of the online monitoring system and the later data publicity,the public have an intuitive understanding of the electromagnetic environment attenuation around power transmission and transformation projects,which can not only make China's electric power industry develop better,but also monitor the unexpected situation in time,maintain public safety and reduce people's fear of electromagnetic radiation in substations.
文摘Flame spread behaviors and temperature rise of fuel surface were experimentally investigated. A series of tests on aviation kerosene pool fires were conducted by using the schlieren image system, micro-thermocouple and infrared thermal imager. The velocity evolutions of flame spread and surface flow under different initial fuel temperatures were discussed. The characteristics of fuel surface temperature rise were revealed, and it was found that the preheating effect of surface flow on fuel decreased with increasing initial fuel temperature.