KEYWORDS: Solar cells, Solar energy, Single mode fibers, Phase only filters, Capacitors, Power supplies, Optical fibers, Acoustic waves, Detector arrays, Design and modelling
A system of long-distance power-over-fiber (PoF) was developed, with the research of the nonlinear effect of single-mode fiber, 1550nm photovoltaic cell and power supply. The distance of energy and information transmission is more than 20km. Two low-loss windows of single-mode fiber are separated by a WDM. The band of 1550nm is used for energy transmission and 1310nm for communication. A 1550nm photovoltaic cell with multi junctions was customized, and the photoelectric conversion efficiency reaches 39.8%. Two stage boost circuit are used for maximum energy capture, and the super capacitor is used to achieve stable power supply. The system realizes the shooting of a picture every 10 seconds, and sends back with the data of temperature and humidity.
In the background of modern smart grid, fiber optic current transformer (FOCT) has become a research hotspot in power system because of its high accuracy, good dynamic performance and other excellent advantages. However, lower temperatures can easily lead to failures and shutdowns, which are extremely detrimental to the safety of the grid. In this paper, the optical frequency domain reflectometry (OFDR) technology is employed to investigate the scattering characteristic of fibers used in FOCT in massively variable temperature environments. The experimental results present the variation of optical loss of various optical fibers at different temperatures, which is particularly useful for further analyzing and investigating the low-temperature failure mechanisms of FOCT.
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