Artificial immune network classification algorithm for fault diagnosis of power transformer

Dissolved gas analysis is an effective method for the early detection of incipient fault in power transformers. To improve the capability of interpreting the result of dissolved gas analysis, an artificial immune network classification algorithm (AINC), inspired by the natural immune system that is able to respond to an almost unlimited multitude of foreign pathogens, is proposed in this paper. The immune network system describes the complex interaction of antibodies and antigens in virtue of some immune mechanisms, such as immune learning, immune memory, etc. AINC mimics these adaptive learning and defense mechanisms to respond to fault samples of power transformers. Consequently, AINC can find a limited number of antibodies representing all fault samples distributing structures and features, which helps to realize dynamic classification. This proposed AINC algorithm has been tested by many real fault samples, and its results are compared with those of IEC ratio codes and artificial neural networks, which indicates that the proposed approach has remarkable diagnosis accuracy, and with it multiple incipient faults can be classified effectively.