Research And Design Of DC Electric Energy Metering Device Based On Hall Sensor

With the development of the new energy industry,the application of DC power is used more and more extensive,especially in the tower base station,new energy vehicles,metro vehicles and other applications.It is significant to study DC energy metering methods and develop high reliability DC energy metering devices for the realization of new energy applications and management.At present,In order to calculate the DC power consumption and the cost sharing demand of the users in the base stations,a DC power metering device is designed in this paper.It is used to monitor the state of DC distribution of tower base stations,and to measure the direct current power consumption of users.Firstly,this thesis introduces the research background and significance of t he subject,then analyzes the research status and development trend of DC power metering technology at home and abroad,and that describes the overall content and structure.The power supply circuit,sampling circuit and RS485 communication circuit are analyzed in detail in hardware.The electrical isolation design is introduced into the power supply circuit and communication circuit module,and the sampling circuit is processed by RC filter,which effectively guarantees the stability and reliability of the hardware system.Layer-driven independence reduces the coupling between program modules and improves the program structure clarity for code transplantation and function tailoring.At the same time,the application program of energy metering and communication protocol of tower base station is analyzed in detail.At last,the function and performance of DC electric energy metering device are tested,and the test results are analyzed.Functionally,the white-box test method is used to test all functions of the DC power metering device.The performance test covers electromagnetic compatibility,mechanical performance and other aspects of the test.Then the accuracy test and error analysis of the DC power metering device are carried out.The results show that the accu racy level of the electric energy metering device reaches the first level,which meets the technical specifications of the tower in China and the development needs of the DC distribution market.