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A method for selecting a positive pole grounding line for a maglev train power supply line

A technology for positive grounding of maglev trains, which is applied in the directions of measuring electricity, measuring electrical variables, and detecting faults according to conductor types, etc. It can solve problems such as inability to locate the grounding section, tripping, and affecting people's production and life in the society where the maglev train operates, and achieves a guarantee Safe and reliable operation, good self-adaptive effect

Active Publication Date: 2019-11-01
南京瑞博特电气有限公司
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Problems solved by technology

But at present, the positive grounding protection is only configured on the negative end of the power supply line. However, once any positive pole is grounded, the grounding point will form a circulation loop with the negative end of all power supply lines. Maglev train operation and social people's production and life

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  • A method for selecting a positive pole grounding line for a maglev train power supply line
  • A method for selecting a positive pole grounding line for a maglev train power supply line
  • A method for selecting a positive pole grounding line for a maglev train power supply line

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Embodiment Construction

[0025] Such as Figure 1-Figure 3 As shown, a method for selecting a positive pole grounding line of a maglev train power supply line includes the following steps:

[0026] S1: Parameter initialization, calculate the basic parameters of data monitoring;

[0027] S2: protection data collection, real-time collection of negative ground current and ground voltage of the power supply bus, and real-time collection of positive line current and negative line current of the uplink and downlink power supply sections of two adjacent power supply feeders in the station respectively;

[0028] S3: Fault logic judgment, according to the basic parameters in S1, detect whether the negative ground current and ground voltage of the power supply bus collected in S2 exceed the normal value, and compare the positive line current and negative line current of the power supply section for abnormalities. If it is obviously greater than the negative line current, it is judged that the positive pole of ...

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Abstract

The invention provides a positive grounded route selection method for a power supply circuit of a magnetically levitated train. The method comprises the following steps: S1, performing parameter initialization; S2, protected data acquisition; and S3, fault logic judgment. The method mainly refers to judging whether the positive pole of a power supply section is grounded by virtue of a method for detecting negative grounding current and a grounding voltage of a power supply bus, judging whether the positive pole of a magnetically levitated power supply circuit is grounded, judging whether a train operates on the power supply section by virtue of the positive and negative power supply current and comparing the positive and negative circuit current data of the power supply section, and refers to processing the positive incoming switch of the positive grounded power supply section connected with the station. According to the method disclosed by the invention, the positive grounded route selection accuracy for the power supply circuit of the magnetically levitated train is greatly improved, rapid and effective isolation of the grounded power supply section of the power supply circuit is realized, and safe and reliable operation of the magnetically levitated train is powerfully ensured.

Description

technical field [0001] The invention belongs to the technical field of electric engineering, and in particular relates to a method for selecting a positive pole grounding line of a power supply line of a maglev train. Background technique [0002] The power supply system of the maglev train is the only source of electric energy for the maglev train, which is extremely important. For the power supply system of the maglev train, the short circuit between the positive and negative poles rarely occurs, and the short circuit mainly occurs in the positive ground of the power supply section. It will gradually develop and expand, seriously threatening the safety of the power supply equipment and personnel of the maglev train. Therefore, when the positive pole of the power supply system is grounded, it is necessary to cut off the power supply line of the corresponding ground terminal. But at present, the positive grounding protection is only configured on the negative end of the powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02G01R31/08
CPCG01R31/083G01R31/50
Inventor 雍洪祥仲昊郭敏东王子康董风举余晓林姜玉凤
Owner 南京瑞博特电气有限公司
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