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High-speed electrified rail traction line protective belt load test method

A technology of electrified railway and load test, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of charging power (small charging current, line protection band, low voltage level, short line distance, etc., and achieve strong on-site operability performance, to achieve the effect of mutual verification

Active Publication Date: 2013-11-27
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

Generally, the distance of high-speed electrified traction power supply lines is relatively short and the voltage level is relatively low (generally 220kV or 110kV), and the line charging power (charging current) is too small to carry out line protection with load verification

Method used

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  • High-speed electrified rail traction line protective belt load test method
  • High-speed electrified rail traction line protective belt load test method
  • High-speed electrified rail traction line protective belt load test method

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0041] The method for checking the load of the high-speed railway traction power supply line protection belt in the present invention, on the basis of analyzing the relationship between the voltage and current phase of the traction power supply system under the different wiring of the traction transformer and the different operating conditions of the electric locomotive, proposes to use the operating state of the electric locomotive in the power supply section Judgment, comprehensive judgment by using the sampling value of the busbar protection device, and judgment by using the locomotive closing inrush current are three kinds of load verification methods for traction line protection to adapt to ...

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Abstract

The invention relates to a high-speed electrified rail traction power supply line protective belt load test method which comprises the analysis of phase relations between voltages and currents of a high-speed rail traction line in different running states and the design of traction line protective belt load calibration methods, and analyzes the phase relations between the voltages and the currents of the high-speed rail traction line under the conditions of locomotive normal load running, electric locomotive regenerative braking and electric locomotive switching in rush currents. Three traction line protective belt load calibration methods and implementation steps are designed by utilizing the voltage and current characteristics of the traction line according to different test conditions, wherein the three traction line protective belt load calibration methods comprise judgment by utilizing the electric locomotive running state in a power supply section, comprehensive judgment by utilizing a bus protection device sampling value, and judgment by utilizing the locomotive switching in rush currents. The three methods all have strong field operability and can be selected according to supplied test conditions at the time of a field test.

Description

technical field [0001] The invention relates to an on-load verification method for relay protection of high-speed railway traction power supply lines, including the principle and implementation method of the on-load verification of traction lines. The method can be conveniently used in electric power production sites as a technology for on-load verification of traction line protection devices during the start-up and commissioning of high-speed railway traction power supply lines. The method belongs to the technical field of electric power automation. Background technique [0002] Substation protection configuration and current transformer (TA) circuit are relatively complicated. For longitudinal current differential protection and directional line protection such as zero-sequence directional protection, distance protection, high-frequency protection, etc., the correctness of TA circuit wiring has a great impact on the device The action behavior is very important. Wrong wiri...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/06
Inventor 袁宇波李鹏黄浩声宋亮亮
Owner STATE GRID CORP OF CHINA
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