Study on Long-Term Operation Stability of Fiber Optical Current Transformer Based on Faraday Effect

2015 ◽  
Author(s):  
Hongxing Wang ◽  
Yuanpeng Guan
Keyword(s):  
Faraday Effect ◽  
Current Transformer ◽  
Term Operation ◽  
Fiber Optical ◽  
Operation Stability

Research on the Improvement of OCT Used in Power System

2013 ◽  
Vol 385-386 ◽  
pp. 995-998
Author(s):  
Hong Peng He ◽  
Jun Liu
Keyword(s):  
Power System ◽  
Solenoid Coil ◽  
Broad Application ◽  
Term Operation ◽  
Current Transducer ◽  
Operation Stability ◽  
The Magnetic Field ◽  
Application Prospects ◽  
Optical Structure

Smart grid puts forward higher requirements for measurement equipments, so optical current transducer (OCT) used in power system possess broad application prospects. In this paper, magnetism gathering technology is applied in the design of OCTs optical structure and the magnetism gathering optical structure based on solenoid coil is proposed. Compared with traditional bulk optical structure, this structure simplifies the optical structure significantly. Results of simulation and field operation indicate that this structure can not only enhance the magnetic field created by the measured current significantly, but also improve the long-term operation stability of OCT.

Nonvolatile Bistable Resistive Switching in Polyimide Bearing Trifluoromethyl Film

NANO ◽  
2017 ◽  
Vol 12 (05) ◽  
pp. 1750055
Author(s):  
Enming Zhao ◽  
Hui Li ◽  
Fengjuan Miao ◽  
Yanmei Sun
Keyword(s):  
Active Layer ◽  
Thermionic Emission ◽  
Memory Device ◽  
Term Operation ◽  
Current Voltage ◽  
Voltage Stress ◽  
Characteristics Analysis ◽  
Device Applications ◽  
Operation Stability

A functional polyimide (CF3 PI) was used as the active layer in our present work for electrical resistive memory device applications. Current–voltage ([Formula: see text]–[Formula: see text]) characteristics analysis on the polyimide memory devices indicates that the polyimide possesses a nonvolatile rewritable flash characteristic with an ON/OFF current ratio of about 104 at the threshold voltage of around [Formula: see text][Formula: see text]V and 3.8[Formula: see text]V. In addition, the device using the CF3 PI as the active layer reveals excellent long-term operation stability with the endurance of reading cycles up to 108 under a voltage pulse and retention times for at least 106[Formula: see text]s under constant voltage stress (1[Formula: see text]V). The conduction mechanisms are elucidated on the basis of the thermionic emission theory and filament conduction.

scholarly journals Design and Development of Sustainable Product Service Systems Based on Design-Centric Complexity

2021 ◽  
Vol 13 (2) ◽  
pp. 532
Author(s):  
Peng Zhang ◽  
Shaohua Jing ◽  
Zifeng Nie ◽  
Boyuan Zhao ◽  
Runhua Tan
Keyword(s):  
Design Stage ◽  
Functional Requirements ◽  
Early Design Stage ◽  
Term Operation ◽  
Development Framework ◽  
Design Attributes ◽  
Product Service ◽  
Operation Stability

Product-service system (PSS) complexity is rapidly increasing in order to meet complex user requirements. Increased complexity leads to PSSs failing to meet sustainability requirements in their initial design. To enhance PSS sustainability and support social benefits, this paper proposes a sustainable PSS development framework based on design-centric complexity (DCC) theory. In the early design stage of a PSS, DCC theory is used to analyze the complexity of the system. Determination of the types of complexity in the system and the corresponding problems is then performed. By combining the sub-field model of TRIZ, the problems can be converted and solved, and the functional periodicity may be established to reduce system complexity. By using this development framework, the conflicts and potential problems of design attributes can be reduced and the possibility of achieving PSSs functional requirements (FRs) can be enhanced. This will maintain the long-term operation stability for the system and enhance the sustainability of the PSS. Finally, the feasibility of the development framework is verified here through the case analysis of a bicycle sharing service and management system.

Analysis of crystallite size changes in a hematite and magnetite formed on steel used in the power idustry

2017 ◽  
Vol 1 (21) ◽  
pp. 65-73
Author(s):  
Monika Gwoździk
Keyword(s):  
Elevated Temperature ◽  
Oxide Layer ◽  
Cross Section ◽  
X Ray ◽  
Term Operation ◽  
Diffraction Line Profile ◽  
Crystallite Sizes ◽  
Scherrer Formula ◽  
Pipe Outlet

The paper presents results of studies on the crystallite sizes of oxide layer formed during a long-term operation on 10CrMo9-10 steel at an elevated temperature (T = 545° C, t = 200,000 h). This value was determined by a method based on analysis of the diffraction line profile, according to a Scherrer formula. The oxide layer was studied on a surface and a cross-section at the outer and inner site on the pipe outlet, at the fire and counter-fire wall of the tube. X-ray studies were carried out on the surface of a tube, then the layer’s surface was polished and the diffraction measurements repeated to reveal differences in the originated oxides layer.

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