Fundamental-frequency and load-varying thermal cycles effects on lifetime estimation of DFIG power converter

Zhang, G.; Zhou, Dao; Yang, Jian; Blaabjerg, Frede

doi:10.1016/j.microrel.2017.06.069

Cited by 16 publications

(9 citation statements)

References 5 publications

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“…Considering the large time-scale of 1 h, all the variables related to the DFIG system are in steady state, hence the output power The lifetime estimation procedure and the corresponding results are described in Fig. 5, where a rainflow counting algorithm is used to extract the thermal cycles with their average and swing values [11]. In the thermal impedance model in Fig.…”

Section: A Lifetime Estimation At the Time Resolution Of 1 Hmentioning

confidence: 99%

Mission profile resolution effects on lifetime estimation of doubly-fed induction generator power converter

Zhang

Zhou

Blaabjerg

et al. 2017

2017 IEEE Southern Power Electronics Conference (SPEC)

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Abstract-In the wind energy generation system, mission profiles are complicated, which range from seconds to years. In order to estimate the consumed lifetime of the power converter, wind speed profiles with the time resolution of 1 hour, 1 second and 0.5 millisecond are studied in this paper, and the corresponding thermal modeling of power semiconductors are discussed. Accordingly, effects of different mission profiles on the consumed lifetime of the power converter are evaluated. In the above three thermal cycles, the IGBT of the grid-side converter and the diode of the rotor-side converter are more fragile, and the total consumed lifetimes are higher. Moreover, the short-term thermal cycles with milliseconds resolution induce the unbalance of the lifetime between the diode and IGBT of the grid-side converter, while thermal cycles with hour, second, and millisecond resolution consumes the similar lifetime of the power components in the rotor-side converter. Furthermore, it is concluded that the lifetime of power components reduces with the increased time resolution, especially for the rotor-side converter.

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Section: A Lifetime Estimation At the Time Resolution Of 1 Hmentioning

confidence: 99%

Mission profile resolution effects on lifetime estimation of doubly-fed induction generator power converter

Zhang

Zhou

Blaabjerg

et al. 2017

2017 IEEE Southern Power Electronics Conference (SPEC)

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“…The typical structure of WES based on doubly fed induction generator (DFIG) is shown in Figure 1. This structure comprises the wind turbine, the gearbox, the DFIG, the transformer, and the power electronics converters (PCVs), that is, the rectifier and the inverter 1, 2 …”

Section: Introductionmentioning

confidence: 99%

Remaining useful life estimation for thermally aged power insulated gate bipolar transistors based on a modified maximum likelihood estimator

Ismail

Saïdi

Sayadi

et al. 2020

Int Trans Electr Energ Syst

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Power electronics converters (PCVs) such as inverters and rectifiers are crucial parts in industrial applications and energy conversion and are commonly used in several power conversion systems. Previous works have only focused on the fault diagnosis of PCVs; however, recently more consideration has been paid on predicting failures. Thus, reinforcing the reliability of power semiconductor devices is crucial for extending the lifetime of the PCVs‐based electrical power systems. This paper presents a novel prognostic approach for estimating the remaining useful life (RUL) of the power insulated gate bipolar transistors (IGBTs) used in PCVs. An IGBT‐accelerated aging database set under thermal overstress is utilized to evaluate the proposed approach. A data‐driven method based on the feature extraction process and a modified maximum likelihood estimator (MLE) technique to RUL estimation of IGBT have been developed and applied. This method is validated to effectively predict the PVC failures based on an accelerated aging experimental data set.

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“…However, the lifetime model for the bond wire is independent with the cycle period, as this model assumes that the immediate plastic deformation leads to fatigue instead of the time-dependent creep. Besides, there are two kinds of thermal cycles in the wind power generation [14], [15]. One is the loading variation based thermal cycles, which are caused by changing wind speed and ambient temperature with cycle period from seconds to years.…”

Section: Introductionmentioning

confidence: 99%

“…The other is fundamentalfrequency based thermal cycles ranging from milliseconds to seconds, which are induced by the complementary conduction between the IGBTs and the freewheeling diodes within a fundamental frequency of the ac current through the power converter. Their effects on lifetime consumption have been studied in [14], and the fundamental-frequency based thermal cycle effects on the chip fatigue are the main focus of this paper.…”

Section: Introductionmentioning

confidence: 99%

Optimal Selection of Power Converter in DFIG Wind Turbine With Enhanced System-Level Reliability

Zhou

Zhang

Blaabjerg

2018

IEEE Trans. on Ind. Applicat.

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With the increasing penetration of wind power, reliable and cost-effective wind energy production is of more and more importance. As one of the common configurations, the doubly-fed induction generator based partial-scale wind power converter is still dominating in the existing wind farms, and its reliability assessment is studied considering the annual wind profile. According to an electro-thermal stress evaluation, the time-to-failure of the key power semiconductors is predicted by using lifetime models and Monte Carlo based variation analysis. Aiming for the system-level reliability analysis, a reliability block diagram can be used based on Weibull distributed component-level reliability. A case study of a 2 MW wind power converter shows that the optimal selection of power module may be different seen from the reliability perspective compared to the electrical stress margin. It can also be seen that the B1 lifetimes of the grid-side converter and the rotor-side converter deviate a lot by considering the electrical stresses, while they become more balanced by using an optimized design strategies. Thus, the systemlevel lifetime increases significantly with an appropriate design of the back-to-back power converters.

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Fundamental-frequency and load-varying thermal cycles effects on lifetime estimation of DFIG power converter

Cited by 16 publications

References 5 publications

Mission profile resolution effects on lifetime estimation of doubly-fed induction generator power converter

Mission profile resolution effects on lifetime estimation of doubly-fed induction generator power converter

Remaining useful life estimation for thermally aged power insulated gate bipolar transistors based on a modified maximum likelihood estimator

Optimal Selection of Power Converter in DFIG Wind Turbine With Enhanced System-Level Reliability

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