Intelligent compensation capacitance for track circuit

Abstract

The invention relates to an intelligent compensation capacitor used for a track circuit, which comprises a track capacitor, wherein a capacitance measuring circuit and a power supply circuit are connected with both sides of the track capacitor respectively, and the capacitance measuring circuit is connected with a wireless communication unit; the capacitance measuring circuit comprises a current sampling circuit which is connected in series with a leading-out wire on one side of the track capacitor and a voltage sampling circuit which is connected in parallel with both ends of the track capacitor, the voltage sampling circuit and the current sampling circuit are connected with a programmable system-on-chip respectively, and the programmable system-on-chip is connected with the wireless communication unit; the power supply circuit comprises a current inductor which is arranged on the other side of the track capacitor and used for acquiring partial signal energy flowing through the track capacitor on the leading-out wire; and the current inductor is connected with a power supply controlling circuit, and the power supply controlling circuit is connected with a buffer energy storing unit. An inspector can obtain parameters of the corresponding track capacitor without touching the track capacitor, and the intelligent compensation capacitor has the advantages of time conservation and labor conservation and greatly improves the working efficiency.

Description

Technical field: [0001] The invention relates to a compensation capacitor, in particular to an intelligent compensation capacitor for track circuits. Background technique: [0002] The compensation capacitor is an important part of the ZPW-2000 track circuit. Compensation capacitors are arranged between rails and installed on sleepers or ballast. Usually one is installed every 100 meters or so, and the spacing near the electrical insulation section is halved. Clearly, the number of compensation capacitors in use is enormous. The nominal capacitance of the capacitor is: 22uf to 90uF; rated voltage: 160Va.c.; insulation resistance: ≥500MΩ. [0003] During use, the performance of the compensation capacitor will deteriorate, and even open circuit (including man-made damage) and other faults will occur. The previous operation method requires personnel to carry the equipment online, remove the compensation capacitor and measure them one by one, in order to judge and Replace fa...

AI Technical Summary

Problems solved by technology

Chinese patent 200610102210.7 "on-line active measuring device for compensation capacitance of non-insulated track circuit", Chinese patent 200420074887.0 "on-line detection device for compensation capacitance of railway track circuit" and Chinese patent 200620078371.2 "on-line self-detection track circuit compensation capacitor", although some solutions are proposed, It is no longer necessary to remove the compensation capacitors for inspection one by one, but these solutions still have some defects, such as: first, the inspector needs to carry the online detection device to go online, and connect the detection probe to the compensation capacitor (that is, the track), which is inconvenient to use, It is also not safe; secondly, the scheme of injecting signal excitation into the track compensation capacitor and then measuring the response results in huge online detection equipment and the risk of endangering the safety of the track circuit itself; thirdly, the current sensor (current clamp) is used to collect current The current sampling scheme of the overcompensation capacitor will introduce a large phase shift, which will cause the calculation of the capacitor loss angle to lose the reference and affect the measurement results

The on-line inspection work is labor-intensive, time-consuming and labor-intensive, and the efficiency is extremely low. Moreover, due to the heavy transportation, maintenance personnel enter the track line to work, and there is a considerable risk of personal safety

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