Design And Implementation Of Power Quality Transmission System Based On Internet Of Things

With the increasing coverage of the power grid,the demand for smart grid construction is also increasing.The monitoring of power quality has also become one of the main contents of power grid construction.This thesis designs and constructs a power quality information monitoring and transmission system based on the Internet of Things by analyzing the actual requirements of power quality monitoring and transmission in smart grid.The system uses wireless transmission,narrowband Internet of Things,embedded operating system and other core technologies of the Internet of Things to achieve the collection and transmission of power quality information of the main nodes of the power system,which has good practical significance.Firstly,based on the analysis of existing power quality transmission schemes at home and abroad,the thesis gives the overall requirements of the power quality transmission system based on the Internet of Things,and focuses on the key technologies used to implement related functions.Secondly,according to the functional requirements of the transmission system,the overall scheme of the transport node hardware circuit is designed,and the design of the minimum system,memory circuit,communication module,power supply circuit,printed circuit board wiring and anti-interference module is introduced.At the same time,the thesis introduces the software design scheme of power quality transport node.It uses the embedded real-time operating system FreeRTOS and the lightweight network protocol stack LwIP to realize the functions of task scheduling and Ethernet transmission.Finally,the thesis tests the designed power quality transmission system.The test results show that the power quality transmission system designed by the thesis can meet the performance requirements in engineering practice.