Research On Substation Equipment Ensulation Online Monitoring&state Evaluation System For Shijiazhuang Grid

From the different characteristics of the internal structure of various types for primary substation equipment to start,the paper elaborated main substation equipment of a variety of online monitoring techniques for Shijiazhuang,such as the main transformer, capacitor-type equipment, MOA, GIS,etc.On-line monitoring techniques are discussed in the running of substation equipment using in detail,and a combination of practical work typical cases found online monitoring were analyzed.Also, the paper also stated that the need to carry out maintenance on the grid has been described.At the same time explains how to take advantage of these online monitoring data to evaluate the state of substation equipment.Firstly, this paper describes the current research on-line monitoring technology, to carry out on-line monitoring of the significance of the case, Shijiazhuang. Secondly, according to the different regions within Shijiazhuang insulated substation equipment inside the structure, the internal structure from the start, starting from the device, the theoretical study of the mechanism of their on-line monitoring, and practical examples based in Shijiazhuang, carried out further analysis.Based on the above thesis idea, they had the second chapter of this paper chromatography-line monitoring of transformer oil, Chapter III capacitive device capacitance relative dielectric loss online monitoring, IV MOA resistive current on-line monitoring, ultrasound ultra Chapter GIS high frequency on-line monitoring. Each chapter in this paper are from the first device to start the internal structure, according to device characteristics, the installation of a corresponding online monitoring device; secondly that type substation equipment in each section were analyzed on-line monitoring principle; Finally, according to each type of substation actual cases found online monitoring system equipment, integrated other monitoring tools, such as: infrared thermal imaging, power testing, disintegration view other methods, a comprehensive analysis of the possible problems insulated substation equipment, from the disintegration of the situation, further verification equipment on-line monitoring effectiveness.For example,The second chapter of the online monitoring mechanism capacitive devices are analyzed theoretically, and capacitance-type current transformers, capacitor voltage transformers two instances of cases, in theory, in fact, analysis of the relative dielectric loss, electrical capacity in the diagnosis of defects in how to use capacitive devices.Finally, the paper explains the national grid company to carry out the necessity of condition-based maintenance,Shijiazhuang how to use online monitoring data, the main substation equipment insulation state status evaluated.How paper also reviews the status of maintenance work workflow, device status classification, as well as how to develop maintenance strategies based on the state of the device.