A Four-Winding Inductive Filtering Transformer to Enhance Power Quality in a High-Voltage Distribution Network Supplying Nonlinear Loads

Yuehui Chen, Zhao Huang, Zhenfeng Duan, Pengwu Fu, Guandong Zhou and Longfu Luo
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Yuehui Chen: State Grid Hunan Electric Power Company, Changsha 410012, China
Zhao Huang: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Zhenfeng Duan: State Grid Hunan Electric Power Company, Changsha 410012, China
Pengwu Fu: State Grid Hunan Electric Power Company, Changsha 410012, China
Guandong Zhou: State Grid Hunan Electric Power Company, Changsha 410012, China
Longfu Luo: The College of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Energies, 2019, vol. 12, issue 10, 1-13

Abstract: This paper solves the problem of reactive power and harmonics compensation in a high-voltage (HV) distribution network supplying nonlinear loads. An inductive filtering (IF) approach where passive filters connect to the filtering winding of a four-winding inductive filtering transformer (FW-IFT) is presented to enhance the power quality of the public grid. This method can not only greatly suppress harmonic currents of the medium and/or low-voltage (LV) side, but also prevent them from flowing into the public grid. The new main circuit topology, where the FW-IFT has specific filtering winding by adopting the ampere-turn balance of the transformer, is presented. On the basis of the structure of the FW-IFT, the magnetic potential balanced equation and inductive filtering technology, its equivalent circuit and mathematical model are established, and the filtering performances are analyzed in detail. Simulation and experimental results rated at SN-10/0.38 of the FW-IFT are presented to prove the efficacy of the comprehensive enhancement of power quality on the grid side.

Keywords: Four-winding inductive filtering transformer (FW-IFT); inductive filtering (IF); power quality; nonlinear loads; passive filter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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