Study Of The Energy Remote Terminal Unit

The traditional electric meter system has many shortcomings such as the measurement not to be precise, wasting time for man to copy the tables, the tedious statistics and so on. Along with network technology development, network already exists in everywhere, people's life style also along with it change. In view of traditional old-style electromagnetism electric meter shortcoming and insufficiency, and unified the current network technology, this article studies and designs a set to transmit based on the Ethernet automatically copies the table system. And emphatically introduces the hardware and software and communication designs of Energy Remote Terminal Unit.The collecting Energy Remote Terminal Unit is the necessary equipment of theenergy data system. It has been a key link of the alteration in the power automationsystem with the energy data collecting system of automated, reliable, maintenanceconvenient. This thesis is based on the design for Energy Remote Terminal Unit. Inthis thesis, the idea of real-time embedded system is applied in traditional energydata collecting system. The system is proposed as well as designed considering thecurrent status of automatic reading meter technology, network technology andembedded system technology in recent years. Energy Remote Terminal Unit for thecommunication of mainstation and substation is put forward based on TCP/IP (PRMP,Power Remote Measurement System Protocol) . The innovating technologies areproved to be credibility and efficiency during system implementing. And the thesisexamines the various algorithms that are currently applied to electrical quantitytransducer. It identifies and proposes a magnitude algorithm, and frequencymeasurement algorithm, both of which are based on the Fourier algorithm. Theproposed magnitude algorithm can eliminate the decaying DC component, and theproposed frequency measurement algorithm can produce a high accurate output. Thenew magnitude algorithm does not require the decaying constant x to be known inadvance. The frequency measurement algorithm can accurately track the systemfrequency by adjusting the amendatory coefficient in real time according to the errorof the original Fourier frequency measurement algorithm.