Failure analysis on over-temperature combustion of transformers in 4 MW offshore wind turbines

Zhu, Yimin; Gong, Yi; Yang, Zhen‐Guo

doi:10.1016/j.engfailanal.2018.10.005

Cited by 17 publications

(10 citation statements)

References 43 publications

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“…Probabilistic analysis of switching transients of wind turbine transformers because of the operation of breaker is included in [13]. In [14], failure analysis of wind turbine transformers regarding on over temperature is made. A 3-phase transformer model is established in the MATLAB Simulink environment to introduces a time domain model of a 3-phase, 2-winding transformer with nonlinear and hysteretic behavior in [2].…”

Section: Introductionmentioning

confidence: 99%

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

Çetinceviz

Şehirli

2022

Preprint

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In this study, by using co-simulation technique, dry type transformer is designed for wind turbine with 3.8MVA, 690V/36kV power and voltages. Transformer used in wind turbine needs extra effort on design stage with respect to the transformer used in transmission and distribution systems due to higher inrush currents, resonance overvoltage, higher voltage and load fluctuations, possible high frequency transients causing the damage of insulation of the transformer. Also, variable output because of the variable wind speed is expressed as a common failure of the transformer stated in, although by power converters the problem can be minimized. Furthermore, transformer design and analysis of its effect to the system, cannot be realized through one simulation software. Therefore, another approach using different simulation software at the same time called as co-simulation or multiphysics solution is needed. In this paper, by using, co-simulation technique including ANSYS Maxwell 3D, Simplorer and Mechanical, transformer design and its effect to the system is investigated. After realizing, three-dimensional transformer design, its lumped parameter consisting of inductance matrix, leakage inductances and resistances are determined analytically and by using eddy current solver. Also, its effect on the system is shown by Simplorer in transients. Core losses of the transformer, high and low voltage windings voltages, their harmonic spectrums, under different load conditions including ohmic and inductive loads defined and also, steady state thermal solution performed and conclusions are made. It is proved that the transformer designed works as it desired.

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Section: Introductionmentioning

confidence: 99%

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

Çetinceviz

Şehirli

2022

Preprint

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…To solve these problems, the authors at [21] propose a series of characterization methods to investigate assembly structure, matrix materials, and macro/microscopic morphologies of failed transformers. A temperature simulation experiment was also carried out on [21] to evaluate normal operating conditions. Analysis results in [21] showed that improper installation, unreasonable design, unqualified fabrication, and improper maintenance were the main causes of WT transformer failure.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Temperature-Based Condition Monitoring System for Wind Turbines

et al. 2021

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With the increasing demand for the efficiency of wind energy projects due to challenging market conditions, the challenges related to maintenance planning are increasing. In this paper, a condition-based monitoring system for wind turbines (WTs) based on data-driven modeling is proposed. First, the normal condition of the WTs key components is estimated using a tailor-made artificial neural network. Then, the deviation of the real-time measurement data from the estimated values is calculated, indicating abnormal conditions. One of the main contributions of the paper is to propose an optimization problem for calculating the safe band, to maximize the accuracy of abnormal condition identification. During abnormal conditions or hazardous conditions of the WTs, an alarm is triggered and a proposed risk indicator is updated. The effectiveness of the model is demonstrated using real data from an offshore wind farm in Germany. By experimenting with the proposed model on the real-world data, it is shown that the proposed risk indicator is fully consistent with upcoming wind turbine failures.

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“…Transformer overheating, gradually becoming a common problem due to the rapid growth of power consumption, directly threatens its life expectancy and the safety of entire grid. Thus, the internal thermal monitoring has attracted widespread attention [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Spatially continuous transformer online temperature monitoring based on distributed optical fibre sensing technology

Liu

et al. 2020

High Voltage

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Transformer internal thermal monitoring exists huge blind areas, and it is difficult for traditional methods to get fully distributed temperature in real time. In this contribution, the distributed optical fibre sensor was creatively applied inside an operating 35 kV oil-immersed transformer which is also qualified for actual power grid operation through the ex-factory tests. Furthermore, the full-region temperature along the windings and iron limbs were firstly monitored in a spatiotemporally continuous manner and the hotspots were also closely traced, fluctuating at 90% of the highvoltage winding height (80% for low-voltage winding) during the whole process of the heat-run test. Corresponding Finite Element Method (FEM) for thermo-fluid field calculation was then utilized for deeper analysis. On the former basis, the actual detected temperature distributions (both spatial and temporal) were compared with the International Electrotechnical Commission traditional model and some modifications were suggested based on the real time measured data. This novel online monitoring application and the detailed internal thermal information may provide a solid reference for the delicate management of power transformers, which also offers a new horizon for the online monitoring in electrical apparatus industry.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Failure analysis on over-temperature combustion of transformers in 4 MW offshore wind turbines

Cited by 17 publications

References 43 publications

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

Optimal Temperature-Based Condition Monitoring System for Wind Turbines

Spatially continuous transformer online temperature monitoring based on distributed optical fibre sensing technology

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Failure analysis on over-temperature combustion of transformers in 4 MW offshore wind turbines

Cited by 17 publications

References 43 publications

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

CAD-based Design of Three Phase Transformer and Comprehensive Analysis for Wind Turbine Using Coupled Electromagnetic Field, Circuit and Thermal Model for 3.8 MVA Power

Optimal Temperature-Based Condition Monitoring System for Wind Turbines

Spatially continuous transformer online temperature monitoring based on distributed optical fibre sensing technology

Contact Info

Product

Resources

About

Failure analysis on over-temperature combustion of transformers in 4 MW offshore wind turbines