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There is a difficulty in setting the coordination of over-current protection in the distribution network with distributed power sources and widely laying optical fiber for differential protection in the distribution network， the study on engineering practice of adopting 5G communication in differential protection in the distribution network is tried. Firstly， based on the 5G communication latency measured by the actual device in the URLLC （ultra-reliable and low latency communications） scenario， the form of the latency is analyzed， and the differential protection currentprotection current is chosen according to the current situation that the 5G communication latency occasionally exists the wide range of jitter. On this basis， a technology for constructing communication network based on the topology of distribution network and a construction technology of self-adaption current differential components in the distribution network is proposed. Finally， the current differential protection devices in the distribution network are developed and used in engineering， which proves the feasibility and reliability of the current differential protection in the distribution network based on 5G communication.

In this paper, sulfur-containing lubricating oil additive is prepared by sulfur-cured corn oil and corn oil ethyl ester. Results showed that the additive reduced friction and wear in the specimen contaminated lubricants. There were also indications that the frictional process, when coupled with the additive induced a structural change in the soot particles within the contact zones, contributing to the improved tribological performance. [ABSTRACT FROM AUTHOR]

In recent years, light-responsive molecules have been incorporated in metal-organic frameworks (MOFs) to fabricate light-responsive intelligent devices, where reversible isomerization of the guest molecules in the nanopores is crucial. However, how to design a porous environment of MOFs to achieve a reversible isomerization remains unknown until now. In this work, donor-acceptor Stenhouse adducts (DASAs), a new kind of visible light responsive compound, were confined in the nanopores of different MOFs to study their isomerization upon visible-light irradiation/mild heating. We found that the polarity of the pore environment is the key to control the reversibility of isomerization of such guest molecules. Under the guidance of this principle, MIL-53(Al) was screened to investigate the proton conductivity and switching performance of the DASA-confined MOF. The proton conductance was up to 0.013 S cm -1 at 80 °C and 98 % RH, and at least 30 switching cycles were achieved thanks to the Grotthuss-type mechanism and the low polarity of MIL-53(Al) pore environment., (© 2023 Wiley-VCH GmbH.)