| After a review of the large-scale, multi-user application system which based on power line carrier communication technology, this paper proposed an on-line-monitoring power supply and consuming management system guided by the general principle of being systematic, multi layers and modeling. The system included five parts: database subsystem, data-acquisition subsystem, client-side service software, system configuration module and system maintenance module.Because the power line communication has the feature of varying with the time, the system should be capable of generating routs for all nodes in power line communication network. Thus, a software relay arithmetic based on sequence and all possible nodes was suggested to solve the problem of distance transmission of the time-varied signals, so as to enhance the robustness of the data-acquisition subsystem.The data-acquisition subsystem was developed using the multi-thread technology. After analyzing the causes of its upper limit capacity, two methods were put forward to improve the capacity of the data-acquisition system. The real-time response performance of the subsystem is improved with the multilevel circular queue based on time-cycled strategy. Client-side software was developed, with beautiful user interface, convenient and easily learned operations, providing functions like querying, analysis, statistic, computing, on-line monitoring and so on, to satisfy the users'need. The Development of the system configuration module and maintenance module make it possible for the users to customize, update, extend the system.The on-line-monitoring power supply and consumption management system can be used to read distance meter and store data automatically, doing the counting, analyzing, computing and monitoring the electricity use status on line. It can meet the demand of the power-supply corporations, enhance the automatization level of electricity management greatly. The system indicates a good prospect of wide application in the future. |
