Ultra fast charging station harmonic resonance analysis in the Dutch MV grid: application of power converter harmonic model

Sun, Yin; Jong, Edwin de; Ćuk, V.; Cobben, J.F.G.

doi:10.1049/oap-cired.2017.1074

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…The transfer ratio from MV to LV was, instead, between 0.5 V/V and 3.0 V/V, while no information was reported for the current transfer ratio. In [44], an advanced converter harmonic model was introduced to study harmonic resonance when an ultra-fast charging station was connected to the MV grid. This model was used for the impedance calculation up to 2.5 kHz.…”

Section: Typical Amplitude and Frequency Of Hfdsmentioning

confidence: 99%

“…HFD propagation generally depends on the impedance of the LV and MV grids and the connected devices. The sensitivity of HFD propagation to changes of the grid impedance at the delivery point has been modeled for the case of EV chargers connected to a LV DC distribution grid [13] and assessed in two experimental case studies [43,44]. It has been found that HFDs can propagate through transformers, with different transfer ratios depending on the direction of propagation.…”

Section: Propagation Of Hfds: Grid Impedance Measurementmentioning

confidence: 99%

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Power Grids and Instrument Transformers up to 150 kHz: A Review of Literature and Standards

Agazar,

D’Avanzo,

Frigo

et al. 2024

Sensors

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The phenomenon of high-frequency distortion (HFD) in the electric grids, at both low-voltage (LV) and medium-voltage (MV) levels, is gaining increasing interest within the scientific and technical community due to its growing occurrence and the associated impact. These disturbances are mainly injected into the grid by new installed devices, essential for achieving decentralized generation based on renewable sources. In fact, these generation systems are connected to the grid through power converters, whose switching frequencies are significantly increasing, leading to a corresponding rise in the frequency of the injected disturbances. HFD represents a quite recent issue, but numerous scientific papers have been published in recent years on this topic. Furthermore, various international standards have also covered it, to provide guidance on instrumentation and related algorithms and indices for the measurement of these phenomena. When measuring HFD in MV grids, it is necessary to use instrument transformers (ITs) to scale voltages and currents to levels fitting with the input stages of power quality (PQ) instruments. In this respect, the recently released Edition 2 of the IEC 61869-1 standard extends the concept of the IT accuracy class up to 500 kHz; however, the IEC 61869 standard family provides guidelines on how to test ITs only at power frequency. This paper provides an extensive review of literature, standards, and the main outputs of European research projects focusing on HFD and ITs. This preliminary study of the state-of-the-art represents an essential starting point for defining significant waveforms to test ITs and, more generally, to achieve a comprehensive understanding of HFD. In this framework, this paper provides a summary of the most common ranges of amplitude and frequency variations of actual HFD found in real grids, the currently adopted measurement methods, and the normative open challenges to be addressed.

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Section: Typical Amplitude and Frequency Of Hfdsmentioning

confidence: 99%

Section: Propagation Of Hfds: Grid Impedance Measurementmentioning

confidence: 99%

Power Grids and Instrument Transformers up to 150 kHz: A Review of Literature and Standards

Agazar,

D’Avanzo,

Frigo

et al. 2024

Sensors

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“…The results of harmonic resonance when a DCFC is connected to an MV network are discussed in [156]. Specifically, unacceptable harmonic voltage distortion occurred due to a VSC-based converter and an ultra-fast charger (250 kW × 4) causing a resonance in network impedance in an MV power grid in the Netherlands.…”

Section: Harmonic Distortionsmentioning

confidence: 99%

Review of Fast Charging for Electrified Transport: Demand, Technology, Systems, and Planning

2022

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As the number and range of electric vehicles in use increases, and the size of batteries in those vehicles increases, the demand for fast and ultra-fast charging infrastructure is also expected to increase. The growth in the fast charging infrastructure raises a number of challenges to be addressed; primarily, high peak loads and their impacts on the electricity network. This paper reviews fast and ultra-fast charging technology and systems from a number of perspectives, including the following: current and expected trends in fast charging demand; the particular temporal and spatial characteristics of electricity demand associated with fast charging; the devices and circuit technologies commonly used in fast chargers; the potential system impacts of fast charging on the electricity distribution network and methods for managing those impacts; methods for long-term planning of fast charging facilities; finally, expected future developments in fast charging technology and systems.

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“…Depending on the characteristics of the respective sources, such emissions may have a varied and peculiar time-frequency and impedance behavior. Paired to the relative difficulty of carrying out comprehensive tests, authors have concentrated mostly on relevant types of sources, such as wind parks [1,2], photovoltaic (PV) parks [3][4][5], electric vehicle (EV) chargers [6][7][8], and smart lighting (e.g. LED or fluorescent lamps) [9,10], including the various cases of lighting as victims and sources of secondary emissions [11,12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Supraharmonic Distortion in MV and LV AC Grids and Derived Limits

Mariscotti,

Mingotti

2024

Preprint

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Since the integration of electronic devices and intelligent electronic devices into the power grid, power quality (PQ) has consistently remained a significant concern for system operators and experts. Maintaining high standards of power quality is crucial to prevent malfunctions and faults in electric assets and in connected loads. Recently, PQ studies have shifted their focus to a specific frequency range, previously not considered problematic, the supraharmonic 2kHz–150kHz range. This range is not populated by the harmonic components of the 50-60 Hz mains fundamental, but a combination of intentional emissions, switching and non-linearity by-products and various types of resonances. This paper aims to provide a detailed analysis of the impact of SH on power network operation and assets, focusing on the most relevant documented negative effects, namely power loss and heating of grid elements, aging of dielectric materials, failure of medium voltage (MV) cable terminations, and interference to equipment and to power line communication (PLC) technology in particular. Under some shareable assumptions limits are derived and compared to existing ones for harmonic phenomena, providing a clear identification of the primary issues associated with supraharmonics and suggestions for the standardization process. Strictly related is the problem of grid monitoring and assessment of SH distortion, discussing the suitability of normative requirements for instrument transformers (ITs) with specific focus on their accuracy.

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Ultra fast charging station harmonic resonance analysis in the Dutch MV grid: application of power converter harmonic model

Cited by 8 publications

References 8 publications

Power Grids and Instrument Transformers up to 150 kHz: A Review of Literature and Standards

Power Grids and Instrument Transformers up to 150 kHz: A Review of Literature and Standards

Review of Fast Charging for Electrified Transport: Demand, Technology, Systems, and Planning

The Effect of Supraharmonic Distortion in MV and LV AC Grids and Derived Limits

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