Application Research Of Electric Power Detection Based On Magnetic Field Precision Measurement

In power systems,the magnetic field is a non-electrical parameter.This subject mainly studies the technology of precision measurement of magnetic field and develops its application in the direction of power detection.The magnetic detection method is used to achieve high-efficiency positioning of submarine cable lines and precise measurement of current in power lines.The research mainly solves the disadvantages of the low efficiency and poor accuracy of the positioning technology of submarine cable lines,and the pain points that current transformers cannot maintain high linearity in full range.This study provides reliable technical support for the protection of power system.Firstly,the paper summarizes the advantages and disadvantages of submarine cable line detection and power line current measurement equipment in electric power detection,focusing on the development status of magnetic detection in electric power detection.The technical solution for magnetic detection of electric power system is determined.Secondly,by establishing the magnetic field model of the submarine cable,the characteristics of the spatial magnetic field of the submarine cable are summarized.It is determined that the three-axis vector fluxgate is used to detect the spatial magnetic field of the submarine cable.This section describes the structure of the detection device and proposed an innovative submarine cable route positioning algorithm.The overall detection system is tested through field ocean experiments.The feasibility of this detection scheme is proved by comparing the results of the traditional "peak method" and "dumb point method" detection methods with the results of the detection method of this subject.Through the analysis of experimental data,this magnetic detection method has higher positioning accuracy and detection efficiency.Thirdly,by studying the demand level of current detection in the high-voltage distribution network,it was decided to use an optical atomic magnetometer to implement current detection in the power system.By making a non-moment solenoid with a high uniformity magnetic field,the optical atomic magnetometer can be used to verify that the measurement scheme can accurately measure the current.The measurement results are calculated for error,linearity and Alan variance,and it is verified that this optical atomic current transformer has higher linearity and accuracy.Finally,a magnetic field generating device that can be used in a high-voltage distribution network is manufactured to achieve the purpose that this new-type current transformer can be used in the electric power system.Finally,the paper summarizes the feasibility and application prospects of magnetic field precision measurement in the direction of electric power detection,and introduces the research content of this subject in this direction,making the magnetic detection method more comprehensive and systematic.It is indicated that the magnetic field precision measurement in electric power detection application has very important significance and research value.