High Precision Measuring Technology and Algorithm on Acquisition Terminal of Power Load Control and Management System

摘要

A design thought about power load control and management system is presented. This thought realized the bidirectional data transmission between master stations and acquisition terminals by GSM/GPRS, it saved investment, shorten the development cycle. The system's structure and main functions were introduced. Discussed high precision and real-time measuring hardware and software design thought about electric parameters in acquisition terminal such as AC voltage, AC current, active power, reactive power and etc. Using equal interval sampling method and interrupt technology in hardware design, reduced synchronization error and improved real-time performance. Using DFT algorithm and several effective data processing methods in software design, enhanced filtering ability, reduced calculation workload and calculation error. This system obtained the national patent, passed the comprehensive test and practical application. This indicates that the design thought about power load control and management system is advanced and related technology is effective.