Online-assessment Theory And Technology Research For Insulatordegradation With Ultraviolet Zoom Detection

The insulator is an important electronic device in power system,whose performance plays a key role in system’s security.Outdoor-working insulators could be degradation because of environmental factors,if it expands,its insulating property will reduce,leading to equipment failure and defect the quality of power supply.So researching the influence between insulator’s ability and power system can help the electric complay and state grid to find ways to take measures and stop the lost from the accident,finally improve the Grid stability.How to reduce the influence of insulator degradation on transmission system has become an important problem need to be solved in China’s electricity industry.Between the methods of insulator on-line monitoring,research on detection and evaluation of insulator discharge based on solar-blind UV is a hot point.Using ultraviolet test method to determine the states of the fault insulator has been promoted,however,it cannot supply the demand that ultraviolet system searching targets with large field of view and detecting objects with small field of view,so it’s hard to determine of insulator discharge from distance accurately.The project intends to solve the theories and technical problems in solar-blind UV corona detection: research on insulator degradation detection hardware system and research on insulator degradation detection upper monitor software storing system and the standard of judgment between insulator ultraviolet discharge and the degree of degradation.Ultraviolet monitoring system based on this method will improve the detection accuracy obviously and meet the actual needs.In this paper we use mathematical method based on nonlinear regression analysis to analyze the insulator degradation relationship between input variables such as UV pulse,then summarizes the ternary quadratic concrete mathematical relationship.Experiments shows that the judgment of the insulator degradation meets the requirements.Theory and method researched in project can overcome the defects such as short working distance,low accuracy that uv detection equipment exists,then judge the degradation degree of the insulator from distance and provide evidence for transmission line insulator judgement.