Equivalent locomotive-traction network coupling test platform and test method thereof

Abstract

The invention discloses an equivalent locomotive-traction network coupling test platform and a test method thereof. The phenomena, including harmonic resonance, unstable harmonic wave, low frequency network pressure vibration, and the like, which frequently occur on the railway site can reemerge through the test platform, and meanwhile, the impedance frequency characteristics of locomotive/traction network can be tested and a technical support is supplied for solving the power quality problem of the high-speed rail traction power supply.

Description

[0001] Technical field: [0002] The invention relates to the field of rail transit teaching and research equipment, in particular to the vehicle-network coupling experiment platform technology. [0003] Background technique: [0004] By the end of 2015, the national railway operating mileage exceeded 120,000 kilometers, ranking second in the world, including 20,000 kilometers of high-speed railways, ranking first in the world. The rapid development of high-speed rail has begun to significantly affect our lives. Not only that, my country's high-speed railway is going to the world and has become an important national business card of China's "going out strategy" and "one belt and one road strategy". It is a great task to ensure the safe and stable operation of such a large-scale high-speed railway. Judging from the operation of high-speed railways in recent years, power quality problems such as harmonic resonance, harmonic instability, and low-frequency network voltage oscillat...

AI Technical Summary

Problems solved by technology

Judging from the operation of high-speed railways in recent years, power quality problems such as harmonic resonance, harmonic instability, and low-frequency network voltage oscillations have been frequently reported on the railway site, resulting in traction blockade of locomotives, and burnout of high-voltage equipment such as protectors and lightning arresters. , continuous amplification of harmonic voltage / current amplitude, severe distortion, locomotive control loop instability and other safety accidents have seriously affected the reliability of power supply and the safe operation of the railway

[0005] In response to these safety accidents frequently reported on the railway site, the Academy of Railway Sciences and related scientific research institutes and universities have carried out a lot of testing work, but the current treatment effect is still not satisfactory. The main reasons include: ① research focuses on specific test data Analysis and summary, without establishing a unified vehicle-network coupling theoretical analysis model, which makes the research efficiency low, poor universality, and wastes a lot of manpower and material resources

② Railway technicians lack effective theoretical guidance when analyzing accident phenomena, but on the other hand, universities and related scientific research units lack actual measurement data support in theoretical research

③The structure of the traction power supply system is complex, the voltage level is high, and the cost of operation interruption is high, which makes it difficult to carry out related testing work and scientific research on site

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