The Study of the Remote Electricity Meter Reading System
|Keywords||low voltage power network spread spectrum carrier remote metering system customer terminal and substation collector|
The REMRS (Remote Electricity Meter Reading System)on low voltage power network is a leading research at present, which offers power supply company great efficient for the electric-energy management and sale. Its key technology and application bottleneck is PLC (Power Line Carrier technology).Firstly the research status and existing problems of PLC are summarized in details, upon which, the thesis analyzes the possibility and superiority of applying SSC (Spread Spectrum Carrier) technology to data communication system on low voltage power network in theory. Then a new design of REMRS based on the technology of spread spectrum PLC communication on low voltage power line is presented in this thesis, which consists of customer terminal, substation collector and management center computer. In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer.As a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal (shortly, customer terminal), which is developed with spread spectrum PLC communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication (for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc), and so on. The hardware and software design of this new customer terminal is dissertated in the thesis. Another important part of the system, substation collector, is developed partly and also dissertated in the thesis, both hardware and software. As a conclusion, the results tested on the spot are provided in the thesis, which demonstrates that the REMRS based on spread spectrum PLC is success and can satisfy the needs of RMS (Remote Metering System).