Visible to the public Design of Distribution Devices for Smart Grid Based on Magnetically Tunable Nanocomposite

TitleDesign of Distribution Devices for Smart Grid Based on Magnetically Tunable Nanocomposite
Publication TypeJournal Article
Year of Publication2018
AuthorsChen, Z., Bai, B., Chen, D., Chai, W.
JournalIEEE Transactions on Power Electronics
Keywordscompositionality, contactor, controllable reactor, cyber physical systems, demagnetization control circuit, distribution devices, electrical safety, energy-saving contactor, Inductors, intelligent energy-saving power equipment, Internet of Things, Magnetic cores, magnetic properties, Magnetic Remanence, magnetically controllable reactor, magnetically tunable nanocomposite material core, nanocomposite, power system reliability, power transformer, power transformers, pubcrawl, reactors (electric), reliable energy-saving power equipment, Resiliency, Saturation magnetization, Smart grid, smart grid distribution devices design, Smart grids, smart power grids, smart power grids safe operation, Soft magnetic materials, transformer, transformer neutral point connection mode
AbstractThis paper designs three distribution devices for the smart grid, which are, respectively, novel transformer with dc bias restraining ability, energy-saving contactor, and controllable reactor with adjustable intrinsic magnetic state based on the magnetically tunable nanocomposite material core. First, the magnetic performance of this magnetic material was analyzed and the magnetic properties processing method was put forward. One kind of nanocomposite which is close to the semihard magnetic state with low coercivity and high remanence was attained. Nanocomposite with four magnetic properties was processed and prepared using the distribution devices design. Second, in order to adjust the magnetic state better, the magnetization and demagnetization control circuit based on the single-phase supply power of rectification and inverter for the nanocomposite magnetic performance adjustment has been designed, which can mutual transform the material's soft and hard magnetic phases. Finally, based on the nanocomposite and the control circuit, a novel power transformer, an energy-saving contactor, and a magnetically controllable reactor were manufactured for the smart grid. The maintained remanence of the nanocomposite core after the magnetization could neutralize the dc bias magnetic flux in the transformer main core without changing the transformer neutral point connection mode, could pull in the contactor movable core instead of the traditional electromagnetic-type fixed core, and could adjust the reactor core saturation degree instead of the traditional electromagnetic coil. The simulation and experimental results verify the correctness of the design, which provides reliable, intelligent, interactive, and energy-saving power equipment for the smart power grids safe operation.
Citation Keychen_design_2018