The Research And Implementation Of The Remote Voltage Harmonic Monitor System

For more and more no-linear electoral devices are used in every day life, harmonic pollution in the power supply system becomes high and it causes lots of serious problems. In order to improve the electric power supply quality, a measure device is needed to analyse the distrubtion of the harmonic pollution in the power supply system.This paper talks about how to design a remote harmoic distrubtion measurement system and how to implement it.It talks about harmonic measurement algorithm, accuracy improve methods, robustness of the RTU(Remote Terminal Unit) and data security of the RTU.In the PC software programming a new method is used to create office documents in C++ programming enviorment. This method uses COM(Component object modal) technology and compound file format as it's fundamental technologies.For the need of remote data communication and device control, network communications of RTU is also researched in this paper. It talks about how to communicate through MODEM and LAN interface, how to implement http serve on 8051 MPU based on HTTP protocols and TCP protocols. Wireless communication is also talked in this paper.