Experimental Study On 1100kV GIS Switching Wave

With the continuous development of China's industrialization process and the continuous improvement of the level of urbanization,the distribution of energy is uneven in the East and west of China.The transmission of power energy urgently requires the use of larger capacity and higher-level power equipment.The site and test technology required for the research and development of 1100kV equipment should be further improved.This.thesis used the 500kV High-Voltage Power Testing Laboratory of Xiamen University of Technology as the research platform,and took the operation wave test of 1100kV GIS(Gas Insulated Switchgear)equipment of ABB(China)Limited as the main research object.The test platform enabled the operation positive polarity to meet the requirements of the IEC standard,and completed the 1100kV GIS operation wave test requirements to save test costs and bring significant social and economic benefits.The main contents of the thesis are as follows:(1)The SolidWorks software was used to build the finite element simulation model of the impulse voltage generator.The model was imported into the ANSYS Maxwell simulation software.The electric field simulation of the impulse generator under different pressure-sharing shapes was carried out.By comparing the simulation results with the experimental data,the reasonableness of the positive polarity test voltage was improved by changing the shape of the equalizing ring.(2)The influence of temperature,humidity and air pressure on the positive polarity operating wave,were studied.By analyzing the experimenal data under different conditions,the mechanism of the influence of temperature,humidity and air pressure on the positive polarity operating wave were discussed.The suitable conditions for Xiamen and the optimal temperature,humidity and air pressure were studied.(3)On the basis of the main principle of Marx circuit,the basic conditions of the test hall and the provisions of IEC international standards,and verify the relationship between the wave head time and the 50%breakdown voltage through the test.By chan ging the resistance value of the wave head resistance,the relationship between the wave head resistance and the operating impulse voltage is obtained,which provides valuable practical experience for the debugging of the high-voltage test platform in the future.Through the combination of simulation calculations and experim ental results,the tests were continuously optimized to enable the 550kV ball to meet and meet the 1100kV operation positive voltage standard requirements.Finally,through a combination of various factors for optimization,the operating positive polarity withstand voltage was increased to 1941.7kV,and the maximum breakdown voltage from 1600.7kV to 1960.8kV.