A Review of On-line Condition Monitoring in Power System

As a means of detecting and assisting maintenance of power equipment, on-line condition monitoring(CM) has been widely used in power generation, transmission, substation, distribution, consumption and other fields in the past few decades. This paper reviews current on-line condition monitoring techniques and development trends of condition monitoring. In the context of `Ubiquitous Internet of things', on-line condition monitoring is surely a promising way towards reliable protection of electrical equipment. However, in spite of obvious progress and undoubted benefits, the on-line condition monitoring system has also experienced a large number of practical problems in the application process such as generally low data availability and reliability. Furthermore, statistics on relative standards show a dramatic blank in international standards of on-line condition monitoring. Therefore, there is an urgent need that the international standards for condition monitoring should be set up as soon as possible. Corresponding areas for further research are also presented such as uncertainty evaluation, error modeling and evaluation system based on sequential control. It is intended that this review will provide the basis for future developments of safe and reliable on-line condition monitoring system.