Research on Pollution Characteristics of Composite Insulators andIts Grey Prediction Method
Composite insulators play an important role in anti pollution flashover because of their excellent hydrophobic recovery and migration performance.However,under the long-term effect of complex factors such as pollution,UV radiation,discharge,tem-perature and humidity,the silicone rubber insulation material of composite insulator is aging gradually.However,the pollution per-formance of aged composite insulators needs to be verified.Therefore,the pollution accumulation characteristics and prediction of ag-ing composite insulators are studied in this paper.Firstly,10 natural pollution tests were carried out on four types of insulators com-bined with new and aging,large umbrella and small umbrella.Through the test results,the pollution accumulation characteristics of each type of composite insulator are analyzed.It is found that the surface salt density of aging composite insulator after 10 years of op-eration is greater than that of new composite insulator.Taking the 10th phase salt density of large umbrella composite insulator as an example,the surface pollution degree of aging composite insulator is 0.0229 mg/cm2 higher than that of new composite insulator,with an increase rate of 39.41％.In addition,the surface pollution degree of large umbrella composite insulator is greater than that of small umbrella composite insulator.Finally,according to the principle of grey theory,the pollution accumulation prediction model of aging composite insulator is established,and the prediction results of the model are in good agreement with the test results.
composite insulatorageinggrey theoryprediction model
万方数据
维普
