Power Electronics Reliability Comparison of Grid Connected Small Wind Energy Conversion Systems

Arifujjaman,; Iqbal, M. Tariq; Quaicoe, John E.

doi:10.1260/0309-524x.35.1.93

Cited by 10 publications

(10 citation statements)

References 24 publications

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“…An Insulated Gate Bipolar Transistor (IGBT) is a three terminal PSD. It is mentioned in [10] that the IGBT has advantages because of its switching speed and in practice it is used in most WTs. WT's component suppliers and producers offer IGBTs as a solution to the increased voltage peaks within the generator that might harm the coils, and the IGBT is also used in WT's control systems.…”

Section: Life Prediction Modelsmentioning

confidence: 99%

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Kostandyan

Sørensen

2011

Energies

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Abstract:Wind turbine reliability is an important issue for wind energy cost minimization, especially by reduction of operation and maintenance costs for critical components and by increasing wind turbine availability. To develop an optimal operation and maintenance plan for critical components, it is necessary to understand the physics of their failure and be able to develop reliability prediction models. Such a model is proposed in this paper for an IGBT power electronic module. IGBTs are critical components in wind turbine converter systems. These are multilayered devices where layers are soldered to each other and they operate at a thermal-power cycling environment. Temperature loadings affect the reliability of soldered joints by developing cracks and fatigue processes that eventually result in failure. Based on Miner's rule a linear damage model that incorporates a crack development and propagation processes is discussed. A statistical analysis is performed for appropriate model parameter selection. Based on the proposed model, a layout for component life prediction with crack movement is described in details.

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Section: Life Prediction Modelsmentioning

confidence: 99%

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Kostandyan

Sørensen

2011

Energies

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“…The generic WT characteristics shown in Figure is the plot of its power coefficient C p against the tip‐speed ratio (TSR) λ , and the latter can be expressed as

λ = \frac{Rω}{V_{w}}

where, ω is the shaft speed, R is the length of the blade, and V w is the wind speed . λ opt is the unique value of λ at which the WT operates at its maximum efficiency of C pmax .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, MPPT is a requirement in WTG only from the cut‐in wind speed, V c , to V r . The V c and V r of a WT being typically around 3 and 12 m/s, respectively, the asking variability in ω of the generator is to the tune of 300% to 400% from the no load state to the full load operation. As such, a comprehensive MPPT demands matching between the torque‐speed characteristics of the WT and the generator.…”

Section: Introductionmentioning

confidence: 99%

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Development of a comprehensive MPPT for grid‐connected wind turbine driven PMSG

Vijayakumari

Kottayil

2019

Wind Energy

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This paper proposes a comprehensive MPPT method by which extraction of maximum power from wind turbine and its subsequent transfer through various power stages and final delivery to the connected grid are realized. In the proposed system, the operation of the wind turbine at its maximum efficiency point is maintained by control of grid-tied inverter such that the shaft speed of the generator is set to result the desired optimum tip speed ratio of the turbine. The proposed comprehensive MPPT estimates the required DC link voltage for each wind speed using a unified system model, uses a loss factor to account for the system losses, and then controls the inverter to push the WT extracted maximum power into the grid. The comprehensive MPPT is developed and is validated in MATLAB/Simulink platform in a wide range of operating wind speed. The results ascertain that the wind turbine is made to operate at its maximum efficiency point for all wind speeds below the rated one. KEYWORDS maximum power point tracking, turbine generator matching, unified system model, wind turbine generator 1 | INTRODUCTIONThe combined power conversion efficiency of a grid-connected fixed speed wind turbine generator (WTG), which essentially involves a squirrel cage induction generator coupled to a wind turbine (WT), varies with wind speed variation and thus yields poor average efficiency meaning suboptimal aggregate energy extraction for an installed WTG capacity. 1,2 On the other hand, the variable speed WTG, which employ either doubly fed induction generator (DFIG) or permanent magnet synchronous generator (PMSG), claim not only higher energy output owing to increased overall efficiency, but also longer plant life as the stress on tower, blades, gear, shaft etc. gets much reduced when compared with the fixed speed WTG. [1][2][3][4] The generic WT characteristics shown in Figure 1 is the plot of its power coefficient C p against the tip-speed ratio (TSR) λ, and the latter can be expressed aswhere, ω is the shaft speed, R is the length of the blade, and V w is the wind speed. 1-7 λ opt is the unique value of λ at which the WT operates at its maximum efficiency of C pmax . For any other value of λ, for example at λ 1 (that is less than λ opt ) and at λ 2 (that is higher than λ opt ), C p is less than C pmax . It therefore suggests the WT to have a varying ω in order to counteract the variation of V w in Equation 1.1 and thus to retain both λ and C p at the optimum point. In other words, if the turbine speed is allowed to vary proportional to the wind speed variation, then it is possible to maximize the wind electricity generation at any site and in turn maximize the profitability. Operation of WT at C pmax is termed as maximum power point tracking (MPPT) in a WT powered system.

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“…Similarly, in wind power generation applications, the widely varying and intermittent nature of the wind speed and low converter modulation frequencies also critically affect the reliability of IGBTs due to the thermal cycling [6]. Therefore, the converter has the dominating effect on the system reliability [7]. In general, power semiconductor devices contribute more than 20% failures of converters, and IGBTs are the most used devices.…”

Section: Introductionmentioning

confidence: 99%

Monitoring chip fatigue in an IGBT module based on grey relational analysis

Zhou

et al. 2016

Microelectronics Reliability

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Chip fatigue inside an insulated gate bipolar transistor (IGBT) module is a kind of incipient defect. It can be considered as an indication of the impending failure, and is utmost important for the safe operation of IGBT modules. Therefore, monitoring the chip fatigue is one of crucial measures to enhance the operating reliability of IGBT modules. This paper presents a prognostic approach for the chip fatigue based on grey relational analysis (GRA), which using dynamic change of the gate voltage as precursor parameter. This dynamic change is caused by aging of the intrinsic parasitic elements involved in gate drive circuit, which reflect the advent of chip fatigue. Grey relational grade is employed in this proposed prognostic approach to quantify the extent of those dynamic changes by little data, and find out potential chip fatigue. Then the operator would have a chance to schedule the maintenance and replace defective IGBT modules timely to avoid wear out. So it can be seen as a prefault diagnostic method. Finally, a confirmatory experiment is also carried out, and the correctness of the proposed approach is verified. Index tems-Power electronics, insulated gate bipolar transistor (IGBT), reliability, chip fatigue, grey relational analysis (GRA) I.

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Power Electronics Reliability Comparison of Grid Connected Small Wind Energy Conversion Systems

Cited by 10 publications

References 24 publications

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Development of a comprehensive MPPT for grid‐connected wind turbine driven PMSG

Monitoring chip fatigue in an IGBT module based on grey relational analysis

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