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A Magnetic-Integrated 10kV Prefabricated Substation with Function of Filtering
Pages: 222-230
Year: Issue:  10
Journal: Transactions of China Electrotechnical Society

Keyword:  Prefabricated substationfilteringintegrationreactor;
Abstract: To solve the harmonic pollution in low-voltage distribution system, a magneticintegrated 10 k V prefabricated substation with filtering function is proposed in this paper. Moreover, to cover the shortages of the air-core reactor and iron-core reactor, a different kind of reactor suitable for prefabricated substation is designed. The designed reactor is made up of two reverse series coils with the same number of turns, and is integrated in the distribution transformer. The integrated reactor has the advantages of good linearity, small volume, and low noise. Firstly, the detailed scheme of the 10 k V prefabricated substation with filtering function is introduced. Secondly, the decoupling techniques between the filtering reactors and transformer windings or among different filtering reactors are analyzed. What is more, the leakage inductance characteristic of the filtering reactors is proved. Finally, a 300 k VA experimental prototype is tested. The results show that the integrated filtering reactors have good linearity and low coupling, and the new 10 k V substation has good filtering effect.
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