Research On Internal Electrical Faults Of Synchronous Generator

Generator is the core equipment of power systems, its safe operation is very important to the power system. With the rapid increase of generating high capacity, generators, security and reliability of operation has been referred to the increasingly high level. Once the development of the internal fault generator winding up, would cause devastating damage generator. Therefore, various types of internal fault generator winding fault analysis and diagnosis has very important practical significance.In this part, the theory of the failure mechanism of stator windings, the stator windings to establish the mathematical model under fault conditions. Synchronous motor starting process for the analysis, and the rotor equation of motion is introduced into the data, the fault generator stator windings, the generator at the start of the main parameters of the change process.The light of the results of theoretical analysis, combined with power system dynamic simulation laboratory simulation test data generator, a detailed analysis of internal faults in stator windings of electrical quantities of each major. Describes the generators in different load levels, different than the case of short circuit turns the generator stator phase current, exciting current, and other major changes in electrical parameters, and then summarized the law of the fault.Of generator rotor winding inter turn short circuit fault mechanism, introduced the related common diagnosis method, analyzed in detail the advantages and disadvantages of each method, and analyzed the generator rotor winding inter turn short circuit caused by vibration and electrical quantities changes.The generator stator core damage fault with an example, the fault conditions is analyzed in detail the reasons for failure, and check processing of the development process. Through the generator core loss silicon steel core experiments to check the generator and Treatment of Short Circuit films, can short circuit eddy current loss, high temperature sensitivity to identify the core characteristics of short-circuit point and the actual take over through the generator load operation temperature, to check the effect of core processing.Combined with online monitoring and diagnosis system generator significance, status, and some have begun to use research results, combined with the actual production site, focusing on large generating units online monitoring and diagnosis system five typical features of these functions research and application status, technical features, and so do a more detailed elaboration and analysis.