Power Line Wireless Phase Checking Method Application And Research

Since the country’s carbon peak and carbon neutrality,the use of clean energy is increasing.In order to better transport and distribute clean energy,to solve the problem of uneven distribution of clean energy,ultra-high voltage,ultra-high voltage power grid construction projects continue to be implemented.Due to the special nature of production and sales,the phase check of power network from a single power supply to a multipoint power supply,the complexity of phase check and detection frequency is increasing,which puts forward new requirements for phase checking,how to quickly and accurately check phase is an important guarantee of safe electricity consumption.Based on this,this paper studies the wireless phase checking method between transmission and distribution lines at long distances and different voltage levels.Firstly,by analyzing the theory and method of remote wireless phase checking technology,the performance analysis of fourier transformation method,related analysis and measurement method,zero-crossing detection method and differential detection method are carried out.Secondly,using the same network frequency characteristics,the method of wireless asynchronous phase checking combining hardware and software is proposed,the hardware design is mainly from the angle of economy and practicality,gives the components of each module circuit,technical parameter settings and optimization methods,and uses MSP430 singlechip and FPGA combination to achieve low power consumption,high precision signal acquisition and conditioning;The collected phase information is compared with the potential phase information of the phase signal comparison module,and the phase difference is obtained as the reference phase in the whole phase checking process.By detecting the line phase information of the to-be-phase checking,the phase information collected is compared with the phase phase information of the phase signal comparison module,another phase difference is obtained,and the phase difference between the two phases is compared to determine the phase relationship between the two.The software part mainly completes the reference software,mobile software,mobile probe head software and handheld device software.Finally,the system hardware and software are tested separately,and the effects of wireless transmission and electromagnetic interference on the sending and receiving process are analyzed.The test results show that the phase checking work of the phase of the transmission and distribution line can be completed by adopting the asynchronous phase checking method proposed in this paper.The system is designed with low cost and low power consumption,which realizes the power phase checking between the different voltage levels from short distance to long distance,greatly reduces the safety risk and workload in operation,meets the actual line maintenance and operation needs,and the desired effect has been achieved.