High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

Song, Kejian; Wang, Mingli; Yang, Shaobing; Liu, Qiujiang; Agelidis, Vassilios G.; Konstantinou, Georgios

doi:10.1109/tpel.2019.2928636

Cited by 70 publications

(73 citation statements)

References 90 publications

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“…Thus, the harmonic problem, a huge impact on the normal operation of trains, is a hidden danger to the security of RESs. Based on the above, proper harmonic suppression [7,8] and good matching characteristics of the harmonic impedance [9] are the key to improving harmonic problems and power quality [10,11], while the harmonic impedance of the traction network is an important parameter.…”

Section: Introductionmentioning

confidence: 99%

A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism

2020

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In railway electrification systems, the harmonic impedance of the traction network is of great value for avoiding harmonic resonance and electrical matching of impedance parameters between trains and traction networks. Therefore, harmonic impedance identification is beneficial to suppress harmonics and improve the power quality of the traction network. As a result of the coupling characteristics of the traction power supply system, the identification results of harmonic impedance may be inaccurate and controversial. In this context, an identification method based on a data evolution mechanism is proposed. At first, a harmonic impedance model is established and the equivalent circuit of the traction network is established. According to the harmonic impedance model, the proposed method eliminates the outliers of the measured data from trains by the Grubbs criterion and calculates the harmonic impedance by partial least squares regression. Then, the data evolution mechanism based on the sample coefficient of determination is introduced to estimate the reliability of the identification results and to divide results into several reliability levels. Furthermore, in the data evolution mechanism through adding new harmonic data, the low-reliability results can be replaced by the new results with high reliability and, finally, the high-reliability results can cover all frequencies. Moreover, the identification results based on the simulation data show the higher reliability results are more accurate than the lower reliability results. The measured data verify that the the data evolution mechanism can improve accuracy and reliability, and their results prove the feasibility and validation of the proposed method.

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Section: Introductionmentioning

confidence: 99%

A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism

2020

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“…It has been reported that the high-order harmonic resonant accidents of electrical railways occurred in many countries, such as New Zealand [1], Korea [2], Britain [3], Italy [4], [5], Spain [6], Thailand [7], China [8]- [10] and so on. This kind of accidents has become serious threat to the safe and stable operation of railways [11], [12]. Therefore, it is of great significance to take effective measures to suppress these resonant accidents and improve the power quality of railways.…”

Section: Introductionmentioning

confidence: 99%

“…200 V in [21] and 400 V in [19]) cannot represent its characteristics very well. On the other hand, the frequency range of interest is wide and it should at least cover 750Hz-3750Hz [11]; in the experiments based on nonlinear loads switching, e.g. transformers [22], capacitors [23], [24], thyristors [25], the interference will sharply decrease to 0.02 p.u.…”

Section: Introductionmentioning

confidence: 99%

Field Tests for Evaluating the Inherent High-Order Harmonic Resonance of Traction Power Supply Systems Up to 5000 Hz

Liu

Wang

2020

IEEE Access

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The inherent resonant frequency of a traction power supply system (TPSS) needs to be accurately identified in order to provide crucial information for resonance suppression, safe operation, and system optimization of electrified railways. In this paper, implementation of experiments was carried out in actual railway systems to evaluate the inherent harmonic resonances of the TPSS. The field tests were based on a harmonic generator (HG) constructed with cascaded H-bridge converters (CHBCs). Compared to other experimental setups, the field tests of this paper, which were performed in the 25kV practical system, can provide straightforward results in a wide frequency range up to 5000 Hz. Such a wide frequency range is necessary for assessing and taking effective measures to address the harmonic resonance problem. The results of this paper will supply valuable data for the modeling of TPSSs and the stability analysis of train converters contributing to improvement of the power quality of electric railways. INDEX TERMS Electric railway, field test, frequency scanning, harmonic resonance, high-order harmonic.

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“…Owing to the advantages of high power factor, low harmonic distortion, and bi-directional power flow, Pulse Width Modulation (PWM) rectifiers attract much attention from academia since their emergence and are widely used in industrial areas, such as renewable power generation [1,2], railway power supply [3,4], and electric vehicle (EV) charging [5,6]. The physical characteristics of semiconductor devices affect the performance of PWM rectifiers, while the conventional silicon (Si)-based semiconductor power devices have gradually reached their limits [7].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Optimization for All-Silicon Carbide (SiC) PWM Rectifier Considering the Impact of Gate-Source Voltage Interference

Wang

Zheng

et al. 2020

Energies

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Compared with conventional silicon (Si)-based Pulse Width Modulation (PWM) rectifiers, PWM rectifiers based on silicon carbide (SiC) Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) have significant technical advantages and broad application prospects in terms of efficiency and power density, inherited from the high-speed switching feature. However, high-speed switching also induces gate-source voltage interference, which impacts the overall character of the conversion system. This paper considered the impact of gate-source voltage interference on loss, revealing an efficiency optimization for all-SiC PWM rectifiers. Firstly, this paper theoretically investigated the mechanism of improving the conversion system efficiency by using the 4-pin Kelvin packaged SiC MOSFETs. Then, based on the industrial product case study, loss distribution, using different package styles, was quantitatively analyzed. Finally, experiment test results verified the efficiency improvement of the PWM rectifier with the 4-pin Kelvin package SiC MOSFETs.Energies 2020, 13, 1421 2 of 17 interference exceeds the switching loss reduction obtained by the high-speed switching, it makes no sense to increase the switching speed further.Many works of literature have discussed the gate-source voltage interference issue, mostly in phase-leg configuration. Zhang et al. [16] discussed the design of the digital isolator and the layout of Printed Circuit Board (PCB). A higher switching speed causes PWM signal distortion through the parasitic capacitance of the isolator. The distorted PWM signals may induce device gate-source voltage interference, and the optimized PCB layout would suppress this gate-source voltage interference. The limit of switching speed is given based on the mechanism of common-mode noise induced by parasitic capacitances in the isolator. The method of adding a shielding layer to the input channel of the isolator and adopting the Kelvin grounding structure is proposed to suppress the interference [17,18]. The crosstalk issue is another kind of gate-source voltage interference [19]. The drain-source voltage change of SiC MOSFET is coupled by Miller capacitance, which changes the displacement current, affects the gate current, and causes the gate-source voltage interference.For the suppression of the gate-source voltage interference issue, two methods are presented by Zhang et al [20]. Firstly, gate impedance regulation (GIR), which is an auxiliary circuit composed of one active device and a capacitor to reduce the gate impedance during the switching transients. Secondly, gate voltage control (GVC), which is an auxiliary circuit consisting of two active devices and one diode, pre-charging the gate-source capacitance before the switching transient. In the follow-up research, Zhang et al. [21] proposed an intelligent gate drive (IGD), where the auxiliary circuit is composed of two active devices and two diodes, to actively control the gate-source voltage and gate impedance under different switching transients. Active miller cl...

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High-Order Harmonic Resonances in Traction Power Supplies: A Review Based on Railway Operational Data, Measurements, and Experience

Cited by 70 publications

References 90 publications

A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism

A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism

Field Tests for Evaluating the Inherent High-Order Harmonic Resonance of Traction Power Supply Systems Up to 5000 Hz

Efficiency Optimization for All-Silicon Carbide (SiC) PWM Rectifier Considering the Impact of Gate-Source Voltage Interference

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