The electricity consumption information collection system is a system that collects, processes and monitors the electricity consumption information of electric power users. It realizes automatic collection of electricity consumption information, measurement abnormality monitoring, electricity consumption analysis and management, related information release, and distributed energy monitoring. , Intelligent power equipment information interaction and other functions, the power consumption information collection system can be divided into three levels: master station, communication channel, and field terminal in terms of physical architecture. The main station level is mainly composed of marketing system servers (including database servers, disk arrays, application servers), pre-collection servers (including pre-servers, workstations, GPS clocks, security protection equipment), and related network equipment.
What are the levels in the physical architecture of the electricity consumption information collection system?