Modelling and analysis of half‐/full‐bridge hybrid MMC when riding through DC‐side pole‐to‐ground fault

He, Zhen; Hu, Jiabing; Lin, Lei; Zeng, Pingliang

doi:10.1049/hve2.12144

Cited by 16 publications

(5 citation statements)

References 27 publications

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“…Various fault types, including DC faults, symmetrical onshore and offshore/onshore AC faults can cause high transient overvoltage in the offshore wind power supply system, which threatens the safe operation of the power grid [24,25]. When the fault occurs in the offshore grid, the operating state of the power grid equipment and the line changes, causing a sudden change of system voltage and current, resulting in transient overvoltage.…”

Section: High-frequency Models Of Offshore Wind Farm In Electromagnet...mentioning

confidence: 99%

Electromagnetic disturbance characteristic of typical high voltage switchgear interruption process in offshore wind farm based on integrated conduction model

et al. 2023

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In an offshore wind farm, a high‐voltage switchgear interruption in an offshore substation creates a high‐frequency, high‐amplitude overvoltage that can cause severe electromagnetic interference problems in the intelligent electronic device. To address this issue, mathematical models, vector fitting and finite element method were used to build an integrated electromagnetic disturbance conduction model, whose accuracy was verified by large current interruption tests. Through the simulation of a typical offshore wind farm's single‐phase grounding fault interruption process, the electromagnetic disturbance characteristics and the impact of the ground position are obtained. The results show that during the fault interruption process of phase B grounded, the dominant frequency of disturbance voltage can reach 4.34 MHz, and the amplitude can reach 1.12 kV. The ground grid has a large impact on the interference voltage, which can reach a maximum value of 2.28 kV under specific conditions. The disturbance voltage in the fault process mainly comes through the current transformer, while during the interruption process, it mainly comes through the ground grid. The authors provide a method to establish the integrated electromagnetic disturbance simulation model, which can improve the accuracy of the electromagnetic disturbance conduction process simulation of intelligent components.

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Section: High-frequency Models Of Offshore Wind Farm In Electromagnet...mentioning

confidence: 99%

Electromagnetic disturbance characteristic of typical high voltage switchgear interruption process in offshore wind farm based on integrated conduction model

et al. 2023

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“…Insulated gate bipolar transistor (IGBT) modules, as fully controlled devices with high current conduction capability, have been widely used in the power transmission [1][2][3][4] and the new energy grid connection [5][6][7]. The failure of the converters could lead to serious impact on the safe operation of power grid.…”

Section: Introductionmentioning

confidence: 99%

A direct bonding copper degradation monitoring method for insulated gate bipolar transistor modules: Boundary‐dependent thermal network combined with feedback control

Zhang

Cheng

et al. 2023

High Voltage

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The direct bonding copper (DBC) substrates of insulated gate bipolar transistor (IGBT) modules degrade inevitably under cycling thermo‐mechanical stress, causing potential threat to the reliability of IGBT modules. However, little attention has been paid to monitoring their degradation. This paper proposes a DBC degradation monitoring method for IGBT modules, which combines boundary‐dependent thermal network and feedback control. A thermal network is employed to describe the internal material degradation of IGBT modules and can be extracted from a finite‐element method model. The boundary conditions including power losses and DBC degradation are considered, enabling the thermal network suitable for various working conditions and different DBC degradation conditions of IGBT modules. The DBC degradation is characterised by its equivalent thermal conductivities measured in the thermal cycling ageing experiments. On the basis of the boundary‐dependent thermal network, feedback control is applied to monitor DBC degradation by regulating boundary‐dependent thermal impedances. Finally, the proposed model is verified from the effectiveness and accuracy of DBC degradation monitoring and junction temperature calculation. This method casts new light on thermal network modelling and could provide a feasible method for the monitoring of DBC degradation.

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“…The accuracy of calculated soil parameters has a great influence on the grounding parameter calculations [1–3]. Therefore, it is significant to study the influence of calculated soil parameters on grounding parameters [4].…”

Section: Introductionmentioning

confidence: 99%

“…The accuracy of calculated soil parameters has a great influence on the grounding parameter calculations [1-3]. Therefore, it is significant to study the influence of calculated soil parameters on grounding parameters [4].Numerous scholars have studied the calculation of the parameters of horizontally layered soil. T. Takahashi gave the expressions for parameters estimation of arbitrary horizontally n-layer soil [5].…”

mentioning

confidence: 99%

Influence analysis of calculated horizontally layered soil parameters on grounding parameters

et al. 2022

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Calculated parameters (soil layer resistivity, soil layer thickness, and the number of soil layers) of horizontally layered soil are usually obtained based on the measured apparent resistivity under different measurement distances, which are significant for the design, operation, and maintenance of grounding grids. Most existing calculation methods of soil parameters are just trying to make the calculation results approach the measurement data, ignoring the relationship among measurement data, the calculated soil parameters, and grounding parameters, which would increase the workload of the measurement. To better balance the distance range of the measurement data and the influence of the calculated horizontally layered soil on grounding parameters, this paper systematically studies the relationship among measured apparent soil resistivity, calculated horizontally layered soil parameters, and grounding parameters. The basic theories of apparent resistivity measurement, soil parameter calculation, and grounding parameter calculation are given, the influence of soil layer thickness on the measured apparent resistivity is studied, and the influence of the calculated soil parameters on the grounding resistance of different grounding models is analysed. Based on different scales of grounding grids, the results give a corresponding reference distance range of measured apparent soil resistivity. Therefore, this paper can help decrease the workload of soil resistivity measurement during grounding parameters analysis, which has far-reaching engineering significance. | INTRODUCTIONHorizontally layered soil parameters are usually calculated based on a series of discrete measured data of apparent soil resistivity (referred to as calculated soil parameters). The accuracy of calculated soil parameters has a great influence on the grounding parameter calculations [1-3]. Therefore, it is significant to study the influence of calculated soil parameters on grounding parameters [4].Numerous scholars have studied the calculation of the parameters of horizontally layered soil. T. Takahashi gave the expressions for parameters estimation of arbitrary horizontally n-layer soil [5]. F. P. Dawalibi analysed the grounding parameters in different horizontally layered soils [6]. However, Ref. [5] and Ref. [6] did not focus on the influence of the measured apparent soil resistivity on the estimation results. J. L. del Alamo used 8 different mathematical methods to calculate the parameters of horizontally layered soil, and gave the advantages and disadvantages of those methods [7]. P. J. Lagace studied the combination method of the static image during the calculation, improved calculation efficiency, and effectively solved the interpolation problem in different methods [8]. In recent years, heuristic optimization algorithms are widely used in the calculation of soil parameters. I. F. Gonos and W. P. Calixto improved the genetic algorithm (GA) to calculate soil parameters, and the results of the This is an open access article under the terms of...

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Modelling and analysis of half‐/full‐bridge hybrid MMC when riding through DC‐side pole‐to‐ground fault

Cited by 16 publications

References 27 publications

Electromagnetic disturbance characteristic of typical high voltage switchgear interruption process in offshore wind farm based on integrated conduction model

Electromagnetic disturbance characteristic of typical high voltage switchgear interruption process in offshore wind farm based on integrated conduction model

A direct bonding copper degradation monitoring method for insulated gate bipolar transistor modules: Boundary‐dependent thermal network combined with feedback control

Influence analysis of calculated horizontally layered soil parameters on grounding parameters

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