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We report high conversion efficiency, high peak power tunable Raman solitons generated in a Tm-doped fiber amplifier. The Raman solitons possess 80% of the pulse energy and have wavelength tunable range from 2.05 μm to 2.25 μm. 166-fs soliton pulses are obtained at wavelength of 2.25 μm with an average power of 970 mW, corresponding to a peak power of 140 kW.
Vibration of AC filter capacitor generates loud noises in HVDC converter stations, which would reach 105dB. Currently, vibration features are not investigated thoroughly. The objective of this work was to measure vibration velocity distribution on AC filter capacitor surfaces and to investigate the vibration features. In the experiments, the capacitor was applied currents consist of three components...
As one of the most important equipment in power system, power transformer plays a major role in guarantying the safe and stable operation of power system. Among the faults in transformer, winding deformation takes a large part. Since 1970s, lots of method, such as Frequency Response Analysis, Low Voltage Impulse have been put into winding deformation detection. Among these methods, Vibration Analysis...
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