Design Of The Power Quality Monitor

The power quality monitor is a kind of measuring instrument monitoring the operation state of electric power in industry, which can provide the basis parameters of power quality such as voltage, electric current, active power, reactive power and frequency, and moreover, can analyze the indexes of power quality such as power harmonic, three-phase voltage asymmetry and grid harmonic voltage fluctuation and flicker for the fake of providing the better support for Electric Power department monitoring power quality.In order to calculate and analyze accurately the indexes of power quality, this power quality monitor is according to the core of digital signal processing technology mostly, adopts the more agile and accurate arithmetic of digital signal processing and moreover uses the new dada processing methods, which can reduce the hardware cost and accord with the requirement of digital technology development.The monitor system is made by the 16-bit fixed-point DSP TMS320LF2407A , the precise potential transformers and current transformers, anti-alias filter, 6-channel simultaneous sampling analog-to-digital converter ADS7864, keyboard, graphics LCD , RS-232 interface etc, which is cheap in cost and easy to control.