A Highly Reliable Method for Judging the Output Voltage of Electrically Separated Phases

Abstract

The invention discloses a high-reliability train position detection method. The high-reliability train position detection method comprises steps as follows: corresponding electromagnetic transducer information in a section is processed through data processing units I, and occupation information of four tracks and train direction information are obtained; a data processing unit II is used for logically configuring information of two data processing units I in the same horizontal coordinate, gathering information for logic judgment and giving large-section information, and the large-section information comprises occupation / clearing information of a large section, forward-travelling information of a train, reverse-travelling information of the train and equipment failure information; a data processing unit III is a train position detection unit and is used for correctly judging the position and the direction of the train according to information of a track and direction detection unit and predicting the distance between the train and a split-phase section to output different voltages to a neutral section. The method can completely meet the demands of a continuous power supply system for train position detection during split phase passing of a catenary train and can be popularized to occasions with other similar demands.

Description

technical field [0001] The invention relates to a high-reliability judging method for electric split-phase output voltage, which is applied to the field of electric current conversion of railway catenary trains with uninterrupted and excessive equal high-voltage and large-capacity power electronics. Background technique [0002] At present, in the electrified traction section of the railway, the power supply mode of the electric locomotive adopts the single-phase power frequency AC mode. In order to balance the load of the three-phase power supply network of the power system and improve the utilization rate of the power grid, the electrified railway catenary adopts a segmented and phase-separated power supply mode, and there is a neutral electrical phase-separated isolation area of ​​about 200-900m every 30-60km. called electroseparation. At present, the mainstream way of over-phase separation in China is the automatic phase-over mode of on-board power failure, that is, wit...

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Problems solved by technology

[0003] This method of manually operating through the phase-splitting area mainly has the following disadvantages: First, this excessive phase-splitting method will bring at least as much as 80 kV operating overvoltage, which may cause damage or failure of train high-voltage equipment. At the same time, the service life of the circuit breaker is shortened, and the reliability of the switchgear is reduced; second, the driver is prone to work fatigue due to frequent and tense monitoring operations, which increases the labor intensity of the driver; third, it affects the driving speed, especially for high slopes. In the heavy-duty section, the excessive phase separation method will cause the locomotive to slow down significantly, prolong the running time of the throat section, and reduce the line transportation capacity

[0005] The existing train position detection technology generally has two methods: track circuit and axle counting detection. Compared with track circuit, axle counting detection has considerable advantages, which are reflected in: 1) axle counting does not need to install track insulation, and does not affect existing Some track circuits; 2) Simple installation and maintenance, low cost; 3) Rail surface pollution does not affect the use of axle counting; 4) Applicable to a wide range of environments, such as track circuits in humid environments are often unreliable

[0006] However, the axle counting system also has obvious shortcomings, which are reflected in: 1) It is easy to be disturbed, such as electromagnetic interference, metal across the surface of the magnetic head, etc.; 2) Once a fault occurs, manual reset is required, the process is cumbersome, and uncontrollable human factors are introduced.

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