Power On-line Monitoring System Design

Today, The reliability of the power supply business, a higher power quality requirements.Power line monitoring system is designed to effectively ensure power supply reliability and power quality, Line for the power equipment monitoring and fault diagnosis opened up a new direction.This article about for the 220V input signal sampling and monitoringSystem requirements:1,The grid circuit with current, voltage, and other parameters, and running remote measurement functions, while according to the appropriate software program to complete the power, frequency, power factor and other parameters of calculation functions.2,With the measurement and calculation of data processing, analysis, and display functions to determine.3,With communication capabilities, complete with computer communication。According to the system design requirements, the design of the main study, AT89C51 microcontroller as the core of the power line monitoring system.The system current and voltage through the sensor signals on the synchronization acquisition, signal conditioning and the conditioning circuit, such as analog-digital conversion to achieve the voltage and current signals of the synchronous acquisition. Simultaneously active power, reactive power, power factor calculations.Signals and data used to complete the display. System supports RS485 communication.Completed the system design of hardware circuit design, modular software program of preparation and design of the monitoring interface. Through hardware debug and laboratory experiments, so that the design system to meet the required conditions, the normal measurement and display.