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

Liu, Qiujiang; Li, Jing; Wang, Mingli

doi:10.1109/access.2020.2980872

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…In the special scene of railway, their injection may lead to harmonic resonance [1], harmonic instabilities [2], and low‐frequency oscillations [3], which can result in electromagnetic interference to adjacent communication lines [4], misoperation of protection devices, transformer breakdown, etc. These have been reported in many countries, such as Italy [5], China [6, 7], and Spain [8]. Recently, harmonics of TPSS have attracted extensive attention.…”

Section: Introductionmentioning

confidence: 99%

“…High‐speed railway load changes dramatically, so the harmonics feature at different moments in the two train driving processes is taken to analyse, which shows how the harmonic content and total harmonic distortion (THD) change when load current fluctuates. Considering frequent high‐frequency resonances [29] but the distribution of high‐order harmonics is unclear yet, the feature of harmonics in a wide frequency range up to 5000 Hz [6] is provided. Moreover, the situation in both regenerative braking and traction conditions are taken into account.…”

Section: Introductionmentioning

confidence: 99%

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Harmonic feature of 27.5 kV traction power system in a Chinese high‐speed railway

Fan

Chen

et al. 2022

IET Electrical Syst in Trans

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The key to controlling harmonics in high‐speed railways is to get information on its harmonic feature. In this study, a continuous 24 h harmonic observation is carried out in Ji'an West traction substation of a typical Chinese high‐speed railway. In both the 24 h operating period and the two train driving processes, the features of harmonics of 27.5 kV buses are studied under multiple operating modes, which finds that the voltage and the current harmonic content mainly consist of low‐order harmonics below the 11th order with high‐order harmonics that ranges from 13th to 31st and 89th to 99th order. The law that the harmonic distribution changes with the load current is derived. Calculation results show a power function relationship between total harmonic distortion and bus current. In regenerative braking modes, the harmonic content is higher than traction with less high‐order harmonics. Finally, the authors find an admittance matrix coupling between the 3rd to the 31st order harmonic voltage and current for simplified modelling of the harmonic transmission.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Harmonic feature of 27.5 kV traction power system in a Chinese high‐speed railway

Fan

Chen

et al. 2022

IET Electrical Syst in Trans

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“…Typical behaviour of the power distribution network is presented by an equivalent circuit and the load with capacitive behaviour is modelled with the help of an aggregated load. All parameters are designed on the basis of actual distribution network parameters in a way, that it has distinct resonances well below 2.5 kHz [29].…”

Section: Introductionmentioning

confidence: 99%

Reduced Sensor-Based Harmonic Resonance Detection and its Compensation in Power Distribution System With SAPF

et al. 2022

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Shunt Active Power Filter (SAPF) is widely used for harmonics and reactive power compensation. However, in addition to the harmonics, harmonic resonance also exists in the network, which is prominent in configurations where both SAPF and capacitor bank are present in the distribution network. Resonance is mainly caused due to interaction between line impedances, capacitor banks and modern electronic equipment with capacitive behaviour. Harmonic resonance leads to an increase in harmonic level around the resonance frequency, which further increases the overall THD of the distribution system. As there can be multiple resonance scenarios which may also vary depending on internal switching of capacitor devices, it is difficult for conventional SAPF to address both harmonic resonance and current harmonics. Therefore, to improve the overall power quality, it is important to first identify/detect and then selectively damp the detected harmonic resonance in the distribution network. Detection of resonance with SAPF commonly require external signal injection, additional circuitry and sensors. This paper deals with noninvasive machine learning (ML)-based resonance detection, which only requires voltage harmonics at the point of common coupling (PCC) as input. Hence, it eliminates the need for any modification in existing control strategy, external signal injection and additional sensors. Also, Resonance detection, resonance damping and harmonic compensation is achieved by utilising only two types of sensors i.e., voltage at PCC and load current.

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“…In fact, this work discusses practical conditions for detection of resonance conditions from a railway vehicle perspective, using information available at the pantograph electric interface. Other measurement techniques have been proposed in the past [9,30,32], using purposely developed equipment located at TPS. The focus here instead is on the observability of resonance phenomena from the pantograph interface, to provide a distributed monitoring system that can be, in principle, installed onboard all the trains of the network.…”

Section: Introductionmentioning

confidence: 99%

Detection of Harmonic Overvoltage and Resonance in AC Railways Using Measured Pantograph Electrical Quantities

Mariscotti

Sandrolini

2021

Energies

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Harmonic resonances are part of the power quality (PQ) problems of electrified railways and have serious consequences for the continuity of service and integrity of components in terms of overvoltage stress. The interaction between traction power stations (TPSs) and trains that causes line resonances is briefly reviewed, showing the dependence on infrastructure conditions. The objective is monitoring of resonance conditions at the onboard pantograph interface, which is new with respect to the approaches proposed in the literature and is equally applicable to TPS terminals. Voltage and current spectra, and derived impedance and power spectra, are analyzed, proposing a compact and efficient method based on short-time Fourier transform that is suitable for real-time implementation, possibly with the hardware available onboard for energy metering and harmonic interference monitoring. The methods are tested by sweeping long recordings taken at some European railways, covering cases of longer and shorter supply sections, with a range of resonance frequencies of about one decade. They give insight into the spectral behavior of resonances, their dependency on position and change over time, and the criteria needed to recognize genuine infrastructure resonances from rolling stock emissions.

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

Cited by 10 publications

References 30 publications

Harmonic feature of 27.5 kV traction power system in a Chinese high‐speed railway

Harmonic feature of 27.5 kV traction power system in a Chinese high‐speed railway

Reduced Sensor-Based Harmonic Resonance Detection and its Compensation in Power Distribution System With SAPF

Detection of Harmonic Overvoltage and Resonance in AC Railways Using Measured Pantograph Electrical Quantities

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