4.8 Article

Accurate Identification of Harmonic Impedance of Traction Power Supply Systems Considering Harmonic Lateral Propagation

Journal

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 70, Issue 5, Pages 5307-5316

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2022.3190849

Keywords

Harmonic analysis; Impedance; Power system harmonics; Load modeling; Voltage measurement; Traction power supplies; Integrated circuit modeling; Adaptive mean shift clustering; harmonic impedance identification; harmonic lateral propagation; impedance-frequency characteristics; load effective coefficient; traction power supply system (TPSS)

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This article proposes a TPSS harmonic impedance identification method considering the harmonic lateral propagation between two adjacent feeding sections. An operation mode determination method and an improved mean shift clustering are presented, eliminating background harmonic effects and ensuring identification accuracy. Comparative simulations reveal that the proposed method achieves superior performance than conventional methods even if the ratio between load- and source-side impedance fluctuates.
The harmonic impedance of traction power supply systems (TPSSs) is a crucial parameter in identifying, preventing and suppressing high-order harmonic resonances. This article proposes a TPSS harmonic impedance identification method considering the harmonic lateral propagation between two adjacent feeding sections. An operation mode determination method and an improved mean shift clustering are presented, eliminating background harmonic effects and ensuring identification accuracy. Comparative simulations reveal that the proposed method achieves superior performance than conventional methods even if the ratio between load- and source-side impedance fluctuates. Experimental results from a scaled-down laboratory prototype further validate the effectiveness and feasibility of the proposed method.

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