The Study Of Crosslinking Of Power Cable Semiconducting Shielding Layer By Microwave Assist Heating

In the development of UV cross-linked polyethylene power cable insulationmanufacturing technology, the cable semiconducting shielding layer cannot becross-linked by UV irradiation, the cable semiconducting shielding layer is heated byusing microwave irradiation, which can be semiconducting shielding layer realize thesynchronous chemical crosslinking one kind of efficient heat method. Microwaveheating technology is using microwave and cable semiconducting shielding layermaterial coupling to produce heating that to heat semiconducting shield layer, thesurface temperature of semiconducting shielding is controlled by using control ofmicrowave power and time of microwave irradiation.The paper use the simulation software COMSOL to research the cablesemiconduction shielding layer temperature distribution by microwave heating. Toanalyze and discuss the effects of electromagnetic field distribution by changing thecavity size, position of sample, placed distance and microwave waveguideparameters. Microwave assisted heating cable semiconducting shielding layertemperature field change is obtained by the simulation, microwave assisted heatingsemiconducting shield feasibility is validated by comparing the experimental datawith simulation results. Master the different models, different waveguide, waveguideposition number changes the distribution of electromagnetic field in the cavity andhow to improve the efficiency of microwave cross-linked semiconducting shieldinglayer method. The actual process of device the size and placement of the waveguideis determined by simulation of temperature field change, and ultimately determinethe cavity length is750mm, the cavity radius is79.5mm, microwave assisted heatingmodel that waveguide horizontal spacing is270mm. By simulation and optimization to improve coverage, sample microwave semiconducting shielding layer microwaveabsorption rate. To the development of UV cross-linked polyethylene insulatedpower cable manufacturing technology, it is important guiding significance and rolein promoting that microwave assisted heating to realize semiconducting shieldinglayer real-time chemical crosslinking.