Modeling of traction power supply system and analysis on its influence on power quality of power grid
In order to analyze the influence from traction power supply system harmonics of the electric multiple units (EMUs) on the power grid, a load simulation model was established, which can truly reflect the harmonic fluctuation of traction power supply system with EMU included. Based on the measured da...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2022-07-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2022.04.102 |
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| Summary: | In order to analyze the influence from traction power supply system harmonics of the electric multiple units (EMUs) on the power grid, a load simulation model was established, which can truly reflect the harmonic fluctuation of traction power supply system with EMU included. Based on the measured data, a fast generation method of EMUs probabilistic harmonic model was proposed and verified in this paper. With a direct traction power supply system built in MATLAB/Simulink, considering the nonlinear characteristics of transformer harmonic impedance, the law of influence from the number and location of EMUs and the short-circuit capacity of the power grid on the electric energy quality of the power grid was analyzed through simulation, and a quantitative formula was given accordingly. This formula can be used to rapidly evaluate the possible harmonics occurring when a traction power supply system is connected to the public grid, which provides a certain theoretical basis for the subsequent harmonic suppression. |
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| ISSN: | 1000-128X |