Four Kinds Of Typical Fault Analysis Of Transformer And Six Of Sulfur Hexafluoride Switch

Insulation is based on safety and quality supervision center, standards-based, effective means of testing and management of high-voltage electrical equipment insulation condition of the whole process of supervision and management, in order to achieve long-term safe and stable operation of equipment[1]. Its main task is to state and industry standards-based, fully grasp the device status and processing equipment hidden defects, accident prevention equipment, four kinds of fault related to this paper, are in the insulation supervision work across and combined with the typical failure analysis to be discussed and solved in theory.High-voltage electrical equipment, a wide range of different forms, must be subjected in operation voltage, mechanical, moisture, temperature and so, occasionally encounter severe adverse conditions, such as internal and external over-voltage, over-current fault and so on. Therefore, not only in high-voltage electrical equipment, natural aging, there is the operation of the deterioration and accelerated aging, and even the term sudden failure of critical equipment can also cause large-scale power outage. Therefore, monitoring device status, prevention of equipment failure (especially insulation failure, which accounts for a larger proportion of equipment failure and repair cycle length) is the power business in the important work of production safety.Thesis on production practices found in the following issues analysis and research, and difficult issues for the corresponding solution:multi-core main transformer ground fault causes and treatment; core remanence causes, the impact of the load test and Prevention measures; main transformer winding resistance imbalance studies; deviation of density relay false alarm and check the larger issues.Study found that:The above problems are not to be a reasonable explanation and propose specific preventive measures, the state would be a good amount of equipment evaluation attention condition, the abnormal state or critical state, the equipment can easily result in an error evaluation and error to determine the impact equipment, normal operation. Such as three phase transformer winding DC resistance unbalance, is a serious condition, is not put into operation. Therefore, to identify the factors that affect the test results and the data excluded one by one, and the high-voltage electrical equipment for accurate evaluation of the state, is the current state of my Office to carry out maintenance and supervision of a priority for insulation.Paper hopes that, through the practice of producing some of the problems of analysis and exploration of high-voltage power systems, chemical and related instruments provide a useful professional experience, able to carry out maintenance and technical supervision of the state has some role to promote and learn from.