| As an emerging technology in the field of building electrical design,urban night view lighting engineering design has its own rules and characteristics.Due to the popularization of large-scale engineering,the relevant technical content has been paid more and more attention by relevant personnel.Urban night view lighting engineering design mainly includes:lighting design,lighting distribution system design,lighting control system design.Its features are:outdoor long distance power supply;wide coverage and high power load and complex crowd.This paper mainly carries out the research and design from the key technical issues such as improving the safety and reliability of electricity consumption,improving the system energy saving,reducing resource input,using solar clean energy,reducing carbon emission and improving the rationality of the control system.The specific research contents are as follows:1.Analyze the relevant technical specifications,design requirements,technical routes,and summarize the design principles of night view lighting engineering.2.In view of the problem that the fault circuit cannot be effectively and timely cut off when the grounding fault occurs,the technical solution route of adding equal potential,reducing grounding resistance and increasing residual current action protection electrical appliances（Residual Current Device,RCD）with protection is put forward,which meets the requirements of safety,reliability and effectiveness of electricity consumption.3.According to the characteristics of outdoor high exposure of equipment in distribution system,SPD（surge protector Surge Protection Device）should be reasonably selected to prevent transient impact overvoltage.For the key analysis,select the discharge current type and value of SPD(Iimp,In)for different exposure levels.The selection method of the SPD effective voltage protection level(Up/f)and the SPD connection form is also analyzed to provide the technical basis for the engineering design.4.In view of the high power load of nightview lighting,the research on energy saving and low carbon of power distribution system is carried out.Firstly,the power loss in the line is analyzed,which can be reduced by arranging distribution equipment;secondly,the causes of harmonic generation of LED lamps are analyzed,and the characteristics of harmonic;finally,the application of photovoltaic power generation can reduce carbon emission,analyze the characteristics of photovoltaic power generation and the problems in night lighting.5.The distribution system of lighting engineering is designed by engineering examples,and the correctness of the technical route and method is verified. |
