Towards More Reliable Renewable Power Systems - Thermal Performance Evaluation of DC/DC Boost Converters Switching Devices

Batunlu, Canraş; Albarbar, Alhussein

doi:10.11591/ijpeds.v6.i4.pp876-887

Cited by 4 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prior to discussing the reasons behind the different temperature profiles of the switching device of the converters while operated by P&O and IC MPPT algorithms, it is worth recalling their operating principles and main causes of the electro-thermal power loss occurring which affects the reliability [39].…”

Section: Dynamics Of the Perturb And Observe And Incremental Conductamentioning

confidence: 99%

Effects of Power Tracking Algorithms on Lifetime of Power Electronic Devices Used in Solar Systems

2016

Self Cite

View full text Add to dashboard Cite

Abstract:In photovoltaic solar energy systems, power management algorithms (PMAs), usually called maximum power point tracking (MPPT) algorithms, are widely used for extracting maximum available power at every point in time. However, tracking the maximum power has negative effects on the availability of solar energy systems. This is due, mainly, to the created disturbances and thermal stresses on the associated power electronic converters (PECs). This work investigates the effects of PMA on the lifetime consumption, thermal stresses and failures on DC-DC converters used in solar systems. Firstly theoretical analysis and modelling of photovoltaic solar systems including converter's electro thermal characteristics were developed. Subsequently, experiments on photovoltaic solar systems were carried out using two different PMAs, namely, perturb and observe (P&O) and incremental conductance (IC). Real-time data was collected, under different operating conditions, including thermal behavior using thermal imaging camera and dSPACE. Converters' thermal cycling was found to be approximately 3 • C higher with the IC algorithm. The steady state temperature was 52.7 • C, for the IC while it was 42.6 • C for P&O. Although IC algorithm offers more accurate power management tool, it causes more severe thermal stresses which, in this study, has led to approximately 1.4 times greater life consumption compared to P&O.

show abstract

Section: Dynamics Of the Perturb And Observe And Incremental Conductamentioning

confidence: 99%

Effects of Power Tracking Algorithms on Lifetime of Power Electronic Devices Used in Solar Systems

2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hence, the module losses were extracted to calculate the losses for each chip. An enhanced version of the driver circuit derived in references [29,30], was implemented in order to drive the inverter module. 3-phase/6-channel PWM feature of the DS5101 platform was used to generate gate signals.…”

Section: Modelling and Numerical Simulationmentioning

confidence: 99%

Strategy for enhancing reliability and lifetime of DC-AC inverters used for wind turbines

Batunlu

Albarbar²

2018

Microelectronics Reliability

View full text Add to dashboard Cite

Lifetime of wind turbine inverters is below expectations therefore, novel design and drive strategies are timely required to achieve optimum life span. In this work, a novel driving strategy to mitigate stresses on inverters is proposed. First, an electro thermal analysis was carried out using finite element modelling methods. Subsequently, the outcomes of the models were validated using DC/AC IGBT based power inverter module interfaced to 1.1kW electrical outputs of a horizontal wind turbine operated under different wind speeds. Real time data was collected using both dSPACE system and high speed thermal imaging camera. The proposed driving method is based on adjusting the switching frequency according to wind speed. Edge detection scheme was embedded in Simulink to determine temperature fluctuations caused by variations in wind speed profile. Effects of these fluctuations are mitigated by regulating the switching frequency and power losses based on a look up table and interpolation method. The proposed strategy of operation reduces cyclic temperature depended lifetime span (total lifetime consumption) to 1.45 x 10-5 cycles compared to 1.88 x 10-5 when operated under conventional fixed frequency. Wire-bond thermal stress was also reduced from 54.5 MPa, for the fixed switching frequency, to 45.5 MPa. This represents about 21% reduction in total lifetime consumption of inverter's wire-bond which, brings huge benefits to wind energy industry.

show abstract

“…Power loss calculation was achieved based on the output current and voltage signals of IGBT/Diode block element and coupled within thermal models. Zhou et al [16] studied another time-domain electro thermal model which was extended by other authors [17,18]. Look up table based power loss calculations were integrated with thermal models for electro thermal monitoring of multilevel converter power electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Real-time system for monitoring the electro-thermal behaviour of power electronic devices used in boost converters

Batunlu

Albarbar

2016

Microelectronics Reliability

View full text Add to dashboard Cite

Reliability of power electronic devices (PEDs) is a key issue to secure power supplies in modern word, especially, those generated from renewable energy sources. Thermal stress due to switching frequency and environmental conditions are commonest cause of currently unsatisfactory PEDs reliability scores. In this paper, the electro thermal performance of PEDs and related parameters are critically investigated using three types of differently manufactured insulated gate bipolar transistors (IGBTs). Namely, punch through (PT), non-punch through (NPT) and field stop (FS) silicon trench gate technologies. First, currents and voltages of the examined IGBTs were measured under different operating temperatures, switching frequencies and electrical loading conditions. Second, power losses of the examined devices were calculated, in real time, based on their measured currents and voltages using realistic mathematical model embedded in a dSPACE system. Subsequently, the power losses for each device were used as an input to a finite element model to graphically predict heat distributions for each of the monitored devices. Compared to expensive measurements taken by high-resolution thermal imaging cameras, the accuracy of the developed system achieved 97%. The obtained results demonstrate the developed model would serve as an inexpensive and powerful tool for monitoring PEDs thermal conditions.

show abstract

Towards More Reliable Renewable Power Systems - Thermal Performance Evaluation of DC/DC Boost Converters Switching Devices

Cited by 4 publications

References 37 publications

Effects of Power Tracking Algorithms on Lifetime of Power Electronic Devices Used in Solar Systems

Effects of Power Tracking Algorithms on Lifetime of Power Electronic Devices Used in Solar Systems

Strategy for enhancing reliability and lifetime of DC-AC inverters used for wind turbines

Real-time system for monitoring the electro-thermal behaviour of power electronic devices used in boost converters

Contact Info

Product

Resources

About