Digital Design Of High Speed Railway Traction Transformer

The rapid development of China’s high-speed railway has become a business card in china. Traction transformer is the heart of high-speed railway and its running state will be directly related to the safe and stable operation of high-speed railway. On line monitoring system is the guardian of the traction transformer. Its real-time monitoring of the status of the transformer will ensure reliable operation of it.In this paper, the integrated monitoring system of traction substation is analyzed. On line monitoring system of transformer is designed and analyzed. The substation automation system often uses structure which is layered and distributed. In order to realize the maintenance of the transformer, the comprehensive monitoring of the transformer is required. But each monitoring IED is connected with the main station, which will increase the network nodes so that the network structure is complicated and the system reliability is reduced, so the main IED integrating all the monitoring information comes into being with all the functions of multi-parameter data acquisition, state assessment and data upload monitoring being realized finally. The setting of the main IED can effectively reduce the interface data and reduce the operating pressure of the monitoring system in the backstage. In this paper, the C++ language is used to make the software design which monitors the function of the main IED. Software functions include data acquisition, status evaluation, and data upload. Data acquisition is mainly connected with multiple sub-IED to achieve multi-parameter data acquisition. The state evaluation is mainly based on the data collected online to assess the status of the transformer. Transformer condition is not always being good or bad, but also in the middle state. Fuzzy algorithm is able to deal with this kind of fuzziness between the two states, so the fuzzy algorithm for the transformer condition evaluation is used. The rationality of the weights in the fuzzy comprehensive evaluation will directly affects the evaluation results in terms of accuracy. In this paper, the optimal combination weights are calculated by using the deviation square and integrating the subjective objective weights. What is more, it is also applied to the fuzzy algorithm so as to make the fuzzy evaluation results accurate, effective, and objective. The correctness of the improved algorithm is tested by combining with the specific examples. In order to realize the function of data upload, this paper carries out information modeling for the main IED and uses the SCL language to describe the information model. It also adopts the 61850 dynamic link database developed by SystemCORP so as to achieve the function of data upload.Finally, a test platform is set up to verify the software function of this paper. It uses the third party software to send data to the main IED by simulating the sub-IED. By using the IEDScout software, it verifies that the main IED has realized the message and communication function of MMS. It uses the Delphi to compile the simulation software for the main monitoring station so as to show the data in real time uploaded by the main IED. By the concrete cases, it is proved that the improved state evaluation algorithm can correctly assess the status of the transformer with the effectiveness of the software designed to monitor the main IED being verified as well.