The Research On Collection And Monitoring Techniques Of GIC In Power Grid And It’s Derivative Disturbance

Geomagnetic induced currents (GIC) caused by magnetic storms will affect the safe operation of the power system. To prevent the risk of GIC, the real-time acquisition and monitoring on the grid GIC and derivative information are needed. The paper has a detailed research on characteristics of the grid GIC and derivative information and sensors used in collection methods and collecting information. It builds a platform for information collection and developed monitoring devices in the laboratory. Based on those above, information and data through the experiment are collected, and data analysis is carried on. The main contents are as follows:(1) The paper has proposed three methods of information collection through the research on characteristics and impact of the grid GIC. After comparing the advantages and disadvantages of these three methods of collection, IMC (integrated magnetic concentrator) Hall sensor is selected for the collection of GIC information, and verify the feasibility of the new Hall-effect sensor through experiments.(2) Through the study of generating mechanism and acquisition method of GIC derivative and vibrated information, four sensors are determined which can be used in the information collection. After comparing their strengths and weaknesses, the piezoelectric and vibration sensor are selected to accelerate derivative information in the experiment. After the final comparison of various performances of types of sensors in the market, the built IC piezoelectric accelerometer whose model is LC0107T produced by the Lens Testing Technology Co.,Ltd. is selected for vibrated information collection in the experiments.(3) Through the study of generating mechanism, acquisition method and harms of the grid GIC derivative noise information, the electret condenser microphone is determined for collecting the information. After the analysis and comparison of the performances of the present sensors in the market, the MPA416Sensitivity Calibration produced by the prestigious companies is selected to collect the experimental noise information.(4) A test platform of the grid GIC and derivative information collection is built for the case of the analog power grid suffering invasion of GIC, providing the conditions for the experiment.(5) A monitoring device on the grid GIC and the derivative information is developed, which is designed to collect and record the grid GIC and derivative information, and link with the rear data platform to achieve remote monitoring capabilities.(6) The information of grid GIC and the derivative information based on the built of experimental platform and monitoring devices in four different operating cases which are no-load transformer, different powe single phase load, the three-phase four wire symmetrical load and the three-phase three wire symmetrical load is collected. Apart from that, the data collected is processed and analyzed.