Time-division Multiplexing Optical Live Detection Technology for Decomposition Products of C5-PFK Gas Mixtures in Insulated UHV Wall Bushings
The present work was one part of the systematic study of the use of C5-PFK gas mixture in typical insulating structures with respect to UHV bushings,and focused on exploring the feasibility and utility of applying time-division multiplexing fiber optical sensing to the assessment of insulation and decomposition properties of C5-PFK gas mixture.The main efforts could be stratified into two aspects:theoretical and software analysis,and hardware and apparatus im-plementation.The former aspect entailed molecular dynamics modeling of insulating and decomposition characteristics of C5-PFK gas mixture,self-programmed simulation of the variation law of absorption spectrum with temperature and pres-sure which obtained the coupling field distribution of UHV bushing fine electric heater in C5-PFK insulation environment,and deduction and prediction of decomposition gas concentration using grey system-NSGA-II hybridized algorithm.The latter aspect was the implementation of time-division multiplexing fiber optical sensing-based live detector capable of quan-titative and online monitoring component contents of decomposition gas,which involved the establishment of a full-scale tes-ting platform for high-voltage switchgear for power frequency,lightning and operational impulse properties of decomposition product,and the addressing of the influences of high frequency vibration and large temperature difference by iteratively optimizing the optical system.It can be concluded from the study that the use of time-division multiplexing fiber fiber sensing technology can realize highly sensitive and wide-concentration-range detection of decomposition product of C5-PFK gas mixture.
C5-PFK gasmolecular dynamicsgrey system-NSGA-II hybridized algorithmfull-scale testing platform for high-voltage switchgearoptical system
万方数据
维普
