Research On The Remote Monitoring System Of Compensation Capacitor In Jointless Track Circuit

ABSTRACT:The jointless track circuit is an important equipment of the train operation control system that is used to check the integrity of train and its occupation, and the compensation capacitor is the key equipment to ensure that the quality of the track circuit signal transmission. Its failure will affect the operation of the train control system, thereby threatening the safety and reducing the efficiency of the train operation. The current research on compensation capacitor mainly focus on the detection level, mainly with problems that the high cost of detection and low detection efficiency cannot meet the actual needs of the development of Chinese railway. With the continuous improvement and update of the remote monitoring system of cab signal (RMSCS), the capacity and precision of the remote monitoring system’s data have been significantly improved to meet the requirements of the remote on-line monitoring of compensation capacitor for data analysis. This dissertation develops the remote monitoring system of compensation capacitor in jointless track circuit, based on the analysis of influence that the compensation capacitor to the induction voltage envelope of cab signal(IVECS) and combined with the basic structure and working principle of the remote monitoring system, The main research includes the following aspects:(1) Put forward the overall solution of the compensation capacitor condition monitoring software based on RMSCS and analyze its feasibility. Because the fault of the compensation capacitor in jointless track circuit will directly affect the amplitude envelope of short-circuit current, and the train receiving antenna have an electromagnetic induction relationship with the track circuit. It makes the effect indirectly reflected in the IVECS generated by receiving antenna, and the train operation data that collected by the remote monitoring system of cab signal data is including the IVECS and its corresponding parameters. Therefore, the monitoring system of compensation capacitor in jointless track circuit based on the remote monitoring system of cab signal is feasible.(2) Put forward the algorithm of the remote monitoring system of compensation capacitor in jointless track circuit. The paper adopts the wavelet modulus maxima method to intercept the main track envelope data adaptively, and the moving average method to filter the high frequency noise component and low frequency trend component, and the local mean decomposition method based on moving average to extract the signal characteristic component, and detects the states of compensation capacitors.(3) Based on the train operation data, realize the software of the remote monitoring system of compensation capacitor through programming, and verify the accuracy of the algorithm of the system using the real data. The result shows that this method can process the data fast, and the result is accurate.