Study On Detection Method And Its Application Of Micro-Power Wireless Communication Mode In Metering Automation Field

The metering automation system is the key technology for the development of the smart grid,and the micro-power wireless communication is often used in the metrology automation system.Micro-power wireless communication has the advantages of no wiring,low power consumption,low complexity and fast communication speed.But affected by the bad working environment(mountain area,basement and so on),the interference of the micro-power wireless communication channel is great,and the automatic terminal of measurement automation has the problems of drop line and low collection integrity.Therefore,it is of great theoretical and practical significance to study the detection methods of micro-power wireless communication in the field of measurement automation system,which is very important to solve the above problems.This thesis proposes the detection method of the micro-power wireless communication in metering automation filed,whice includes the following parts:Firstly,this thesis introduces the components and technical characteristics of the metering automation system,summarizes the research status of the detection methods of micro-power wireless communication both at home and abroad,and compares the detection technologies commonly used in the measurement automation system.From the two aspects of the basic principle and channel characteristics of the micro-power wireless communication,the application of the micro-power wireless communication in the metrological automation system is discussed.Secondly,put forward the measurement automation field micro-power wireless communication detection method.The classification and characteristics of wireless channel are analyzed,free space model and logarithmic distance loss model are studied,and the detection methods for communication protocol consistency,radio frequency performance and interoperable performance are designed.The free space model and the logarithmic distance loss model of the micro-power wireless communication are compared and analyzed by simulation experiment.The results show that the logarithmic distance loss model can be applied to the channel modeling of urban buildings.Thirdly,design a micro-power wireless communication detection device.The hardware circuit of the micro-power wireless communication detection device is designed according to the technical requirements of the measurement of the micro-power wireless communication in the measurement automation field.The hardware design principle of the key units,such as the multi-function electromagnetic wave chamber,the listening device and the intelligent attenuation unit,is given in detail,and the software design of the wireless communication detection device for the micro-power rate is given.Finally,the measurement automation field communication test environment is constructed.According to the relevant standards and protocols,the actual measurement of the consistency,radio frequency performance and interoperability of the automation field communication protocol is carried out.The actual test results show that the developed micro-power wireless communication detection device can realize the interception of the power meter and the concentrator communication message.The upper computer software can complete the analysis and communication protocol consistency,radio frequency performance and interoperability analysis of the measurement automation field micro-power wireless communication message.