Investigation of harmonic properties of a typical nonlinear load in an AC power-electronics-based micro-grid

Tan, Shulong; Yang, Geng; Geng, Hua; Lv, Qing; Wang, Haifeng

doi:10.1109/ifeec.2015.7361441

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Previous invasive measuring methods include the approaches based on non-linear loads (e.g. thyristorcontrolled circuits [20], switching capacitor banks [21], and diode rectification loads [22]) and inverter-based methods [23][24][25]. Table 1 shows that non-linear load-based methods are not very expensive as some existing components, such as the reactivecompensation capacitor banks along the lines, can be adopted for measurement tasks.…”

Section: Introductionmentioning

confidence: 99%

Resonant frequency identification based on harmonic injection measuring method for traction power supply systems

Liu

Wang

Zhang

et al. 2018

IET Power Electronics

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Accidents related with high-order harmonic resonance seriously threaten the safety and stable operation of traction power supply systems (TPSSs). Generally, the resonant frequency of a TPSS, which is the crucial information for resonance suppression, cannot be accurately obtained through model-based methods due to the TPSS complexity. This study proposes a direct measuring method that harmonic currents at different frequencies and amplitudes are injected into the TPSS by a harmonic generator (HG). Then, the resonant frequency can be identified by measuring the harmonic response. The HG based on a single-phase cascaded H-bridge converter and its control algorithms are developed. Both simulations on a railway system model and experimental results on an equivalent resonant circuit are carried out to validate the feasibility and effectiveness of the proposed method.

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