Vibration modal analysis and calculation of a new HVDC converter transformer with inductive filtering method

Chen, Yuehui; Li, Yong; Peng, Yanjian; Luo, Longfu

doi:10.1109/drpt.2015.7432522

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…[6] involved the study of magnetostriction using FEM, which is done on an electrical sheet of 160 kVA power transformer with a rated voltage of 2000/400 V. In Ref. [20], the vibration and noise of a 18.23-kVA transformer are studied in a rectangular core. Authors in Ref.…”

Section: Introductionmentioning

confidence: 99%

Modelling of magnetostrictive vibration and acoustics in converter transformer

Yadav

Mehta

2021

IET Electric Power Appl

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The converter transformers are susceptible to more noise and vibration when compared to power transformers due to the presence of DC bias in the DC transmission line. DC bias occurs mostly due to inaccuracies in valve firing resulting in a small residual DC oscillating around zero. Measurement of magnetostriction becomes significant as it influences the vibration and noise from the core. Hence, a magnetostrictive model of a high-voltage DC converter transformer has been developed. This work analyses the vibration and noise acoustics under such an occurrence. First, the core of the transformer model is designed in the stepped configuration for 240 MVA; then, magnetostrictive vibration is analysed by using suitable modules of COMSOL Multiphysics at different magnitudes of DC bias. The physics of noise has been interfaced using the Acoustics Module, and the results are recorded. Finally, artificial neural network model is developed for the prediction of vibration and noise characteristics of the model. The fitting process of neural network was then remodelled using various optimisation techniques, namely teaching-learning-based optimisation, particle swarm optimisation, biogeography-based optimisation, simulated annealing and binary coded genetic algorithm, and their results were compared to obtain the best-suited method using % mean-squared-error evaluation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Modelling of magnetostrictive vibration and acoustics in converter transformer

Yadav

Mehta

2021

IET Electric Power Appl

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“…Vibration analysis utilizes specialized sensors, such as accelerometers, to capture the vibrations induced by systems or structures. These sensors measure the acceleration, velocity, or displacement of the vibrating component, converting the mechanical vibrations into electrical signals [39][40][41][42][43][44][45][46][47][48][49][50][51][52].…”

Section: -Introductionmentioning

confidence: 99%

“…When a mechanical system operates, it generates vibrations that can be caused by factors such as imbalances, misalignments, wear, resonance, structural weaknesses, or other mechanical faults [26][27][28][29][30][31][32][33][34][35][36][37][38].Vibration analysis utilizes specialized sensors, such as accelerometers, to capture the vibrations induced by systems or structures. These sensors measure the acceleration, velocity, or displacement of the vibrating component, converting the mechanical vibrations into electrical signals [39][40][41][42][43][44][45][46][47][48][49][50][51][52].Once the vibration signals are obtained, they are analyzed using various techniques and tools, including time-domain analysis, frequency-domain analysis, statistical analysis, wavelet analysis, and advanced signal processing algorithms . The goal of vibration analysis is to extract meaningful information from the vibration signals to understand the behavior, diagnose any faults or anomalies, and make informed decisions regarding maintenance and repairs.The key objectives of vibration analysis include:1.…”

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confidence: 99%

Application of vibration analysis for the diagnosis of rotating machines

Mohamedi

2023

Preprint

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By examining the RPM profile, analysts can identify any deviations or anomalies in the vibration patterns at different speeds. This information can help identify potential faults or imbalances within the rotating machinery. For example, unbalanced rotors or misalignment issues may manifest as increased vibration amplitudes at specific speeds. With a comprehensive understanding of the RPM profile, analysts can make informed decisions regarding maintenance and repairs. By identifying the specific speed ranges where vibrations are problematic, they can schedule maintenance activities accordingly. This proactive approach can help prevent unexpected breakdowns and costly repairs.

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“…Similar to the ordinary transformer in the low-voltage grids, the basic structure with specific parameters such as the rated currents, voltages, and the minimal shortcircuit impedance of the converter transformer should be calculated [8]. Moreover, due to the nonlinear operation characteristic of the converter in the HVDC system, losses, vibration and the harmonic noise in the system [9][10][11], and some electromagnetic vibrations of their windings and cores of itself [12][13][14], the operation of the converter transformer will be affected. Hence, these vibrations and noises may lead to some engineering projects' operation failures [15].…”

Section: Introductionmentioning

confidence: 99%

Design Requirement and DC Bias Analysis on HVDC Converter Transformer

Peng

Liu

et al. 2021

E3S Web Conf.

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The converter transformer plays a critical role in the high-voltage direct current (HVDC) transmission system, which connects but separates the AC grids and the converter. This paper briefly introduced the essential design requirement of the HVDC converter transformer in a system at ±800kV level and analyzed the DC bias influence on the transformer. The DC bias current effect simulations are analyzed in MATLAB and ANSYS Maxwell in this paper, respectively.

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Vibration modal analysis and calculation of a new HVDC converter transformer with inductive filtering method

Cited by 3 publications

References 14 publications

Modelling of magnetostrictive vibration and acoustics in converter transformer

Modelling of magnetostrictive vibration and acoustics in converter transformer

Application of vibration analysis for the diagnosis of rotating machines

Design Requirement and DC Bias Analysis on HVDC Converter Transformer

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