Method for on-line monitoring conversion resistance force of switch machine

Abstract

The invention discloses an on-line monitoring method for switching resistance of a switch machine. The method comprises the following steps: establishing a switch machine equivalent input and output model: calculating various losses by using an electrical energy flow analysis method and by combining effect of power supply cable resistance of a switch machine drive motor on the operating energy flow of the drive motor, extracting output torque of the drive motor, establishing a set model parameter value; isolating and sampling the three-phase voltage and three-phase current of the switch machine drive motor by a voltage transformer and a current transformer, outputting to a switching force monitoring module for operation to obtain a mean square value of current and active power, and outputting to a turnout collection slave; collecting the input current and a power curve by the turnout collection slave according to the turnout state, calculating a switching force curve of the switch machine according to the set model parameter, and realizing display, storage and alarming of the curve by reporting the switching force curve to a microcomputer for monitoring with CAN communication. The method has the advantages of realizing the timely, accurate and practical railway turnout monitoring and maintenance.

Description

technical field [0001] The invention relates to a method for on-line monitoring of railway transportation, in particular to a method for on-line monitoring of switching resistance of a switch machine. Background technique [0002] Turnout is the difficulty and focus of electrical maintenance and repair in the railway industry. The electrical department urgently needs the computer monitoring system to play an effective role in the process of turnout maintenance. In the original 2000 version of the microcomputer monitoring technical conditions (TB) of the Ministry of Railways, the operating current of the turnout was monitored, which played a certain role in the maintenance of the turnout equipment. As the railway has been speeded up several times in recent years, related equipment has been updated and upgraded on a large scale. Therefore, the monitoring of the operating current of the turnout cannot fully and truly reflect the working conditions of the turnout, especially f...

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Problems solved by technology

However, due to the strict safety requirements of railway transportation, the above method cannot realize online testing, and it is only used as a means of daily (half a year) maintenance

Chinese Invention Patent Publication No. CN1804568A discloses "A Method for Real-time Monitoring of Switching Resistance of Switch Machines and Its Monitoring Equipment". Since this method only considers the influence of power on the switching force of the switch, it cannot fully cover the factors that affect the switching force of the switch. , which will cause errors; at the same time, in the implementation process of this method, a complicated calibration process is required, and the feasibility of application is low, especially for railway sections with heavy traffic

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