Evaluation of thermal imaging system and thermal radiation detector for real-time condition monitoring of high power frequency converters
Tóm tắt
We have carried out at laboratory test to study the feasibility of using thermal radiation detectors for online thermal monitoring of electrical systems in wind turbines. A 25 kW frequency converter is instrumented with a thermal camera, operating in the 8–14 μm wavelength range, and a single-pixel thermopile sensor, operating in the 4–8 μm wavelength range, to monitor the temperature development of the power electronics under various load sequences. Both systems performed satisfactorily with insignificant temperature deviations when compared to data from calibrated point contact sensor. With spatial averaging over a 7 mm × 7 mm for the camera and temporal averaging over 60 s for the thermopile sensor, we reduce the root mean square noise to 45 mK and 68 mK respectively. The low cost and simple operation of the thermopile sensor make it very attractive for condition monitoring applications, whereas the attractive feature of the camera is the possibility of multi-point or distributed temperature measurements.
Tài liệu tham khảo
Daneshi-Far Z, Capolino GA, Henao H (2010) Review of failures and condition monitoring in wind turbine generators. In: International conference on electrical machines, proceedings of ICEM conference, Rome, 6–10 Sept 2010
Lu B et al (2009) A review of recent advances in wind turbine condition monitoring and fault diagnosis. In: Power electronics and machines in wind applications, 2009. pp 1–7
Department of Defense (1995) The military handbook for reliability prediction of electronic equipment. Defense Printing Service, Mechanicsburg
Ciappa M, Fichtner W (2000) Lifetime prediction of IGBT modules for traction applications. In: Proceedings of IEEE 38th annual international reliability physics symposium, IEEE, pp 210–216
James PA (2012) Health monitoring of IGBTs in automotive power converter systems. PhD, The University of Manchester
Kuhn H, Mertens A (2009) On-line junction temperature measurement of IGBTs based on temperature sensitive electrical parameters. In: Proceedings of the 13th European conference on power electronics and applications 2009, pp 1–10
Bazzo JP, Lukasievicz T, Vogat M (2012) Thermal characteristics analysis of an IGBT using a fiber Bragg grating. Opt Lasers Eng 50:99–103
Gobi-640-GigE—Scientific brochure. http://www.xenics.com/en/infrared_camera/lwir_-_infrared_thermography_camera/gobi-640-gige__thermal_imaging_camera_with_gige_vision_interface.asp. Accessed 25 Feb 2014
TMP006EVM user guide and software tutorial. http://www.ti.com/lit/ug/sbou109a/sbou109a.pdf. Accessed 25 Feb 2014
Infrared thermopile sensor in chip-scale package. http://www.ti.com/lit/ds/sbos518c/sbos518c.pdf. Accessed 25 Feb 2014
SENTRY GB-200 wireless temperature monitoring. http://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/6B5FEFE64164D3FBC12577CB003EFDDA?OpenDocument. Accessed 25 Feb 2014
Kolstad H, Ljøkelsøy K (2002) 20 kW IGBT omformer. Beskrivelse, 3rd Utgave, SINTEF Energiforskning AS