Implementation of a internet-based power quality monitoring system by dual microprocessors

In this paper two low-cost microprocessors are employed to build up a internet-based instrument system for remote monitoring of power quality, the instrument system can collect various types of power quality disturbances in interactive or automatic mode. Besides, an SD data storage device is used to save raw data which can be also uploaded to a database server via internet, users can access the server by an ordinary browser to effectively realize the information of power quality conditions at a certain location. The built-up prototype of the system is tested in different ways, and the test results validate the performance and feasibility of the instrument system.