| Power transformer, which is the distribution and transformation of power, is the whole core equipment of substation and power distribution station in power system. So the safety and reliability of power transformer is the important guarantee of power distribution station and safe, high-quality, economical, reliable operation of power system. And the operation condition can be judged according to real-time operating data of transformer, which can promote condition-based maintenance and improve the network self-healing ability.Aim at the complex of fault mode and difficult to effectively evaluate problems for power transformer, the qualitative and quantitative evaluation index system are determined through by selecting represent of main parameters of transformer state information. secondly, the sets pair algorithm is utilized to construct the model of condition evaluation for power transformer by this paper. And the correlation degree function is used to determine the correlation degree between parameters and grade and mathematical relationship between each other in order to solve the uncertain problem that parameters have. At the same time, the condition evaluation is achieved through by combination of confidence criteria.Finally, the software interface of condition evaluation for power transformer is developed based on the model proposed by this paper through by applying the GUI function of MATLAB. And the software is utilized to evaluate the condition of power transformer for Dong Xinying wind power station. Verified by the related tests and later operational state, the condition evaluation model proposed by this paper is more practical and can effective and accurate evaluation on the status of running transformer. And assessment results can be used as reference for making of maintenance strategy. |
