Traction load modeling method based on equivalent fault conversion

A modeling method and a technology for pulling loads, applied in simulators, instruments, control/regulation systems, etc., can solve the problems of heavy acquisition and processing work, inability to implement identification and modeling methods, and large hardware investment.

Active Publication Date: 2011-11-16
XINYANG POWER SUPPLY OF HENAN ELECTRIC POWER CORP +1
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Problems solved by technology

Generally speaking, it is more accurate to identify, process and model the recorded wa...

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  • Traction load modeling method based on equivalent fault conversion
  • Traction load modeling method based on equivalent fault conversion
  • Traction load modeling method based on equivalent fault conversion

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] 1). Judging the operation mode of the traction network

[0036] The "three major components" of electrified railways are electric locomotives, traction substations and catenary. Most of our country adopts three-phase-two-phase traction substation. Analyze the main transformer with Scott connection. See attached for Scott wiring and vector diagram figure 2 .

[0037] There are two windings on the primary side of the transformer, and the M-phase winding is connected to the two-phase voltage of the high-voltage system (such as figure 2 In the B, C phase), the other winding T is connected to the center point of the M winding (such as figure 2 point D) and another phase in the high-voltage three-phase voltage (such as figure 2 Between the A phase), the turns ratio of the M winding and the T winding is Two s...

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Abstract

The invention discloses a traction load modeling method based on equivalent fault conversion. The method comprises the steps of: firstly, judging an operating mode of a traction electric network, determining the magnitude of impulse current of a power supply arm and solving a load impedance conversion value; then solving impedance values, such as a short-time fault and the like; and finally, calculating an index value of power quality of a power grid to obtain a mathematical model capable of accurately describing traction load features. The traction load modeling method disclosed by the invention can be used for simulating the impact strength, the nonlinearity and the asymmetry of the traction load at the same time and can be applied to analysis of the power quality of an accessed power system. The traction load modeling method is already applied to actual projects and is verified by a traction substation in Xinyang city of Henan province. According to the traction load modeling method, by simulating the load of the traction substation, partial index values of the power quality of a regional power grid with introduction of an electrified railway are obtained, and a basis and a direction are provided for searching measures for improving the regional power quality.

Description

Technical field: [0001] The invention relates to the technical field of electric load modeling, in particular to a traction load modeling method based on equivalent fault transformation. Background technique: [0002] Traction load modeling is the basis of electrified railway operation analysis, and its accuracy and effectiveness are of great significance to the use of digital simulation technology to analyze the characteristics of electrified railway. Generally speaking, it is more accurate to identify, process and model the recorded wave data of the buses on both sides of the traction transformer. Method cannot be implemented. For a long time, through the research on the mechanism of the traction network, domestic and foreign scholars have mostly established its mathematical model for the harmonic or negative sequence generated by the traction load. Since the impact, nonlinearity and asymmetry of the traction load are three major characteristics at the same time, it is p...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 邱健张睿陈兴雷严剑峰陆俊任国威
Owner XINYANG POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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