IMPROVED GROUNDING TRANSFORMER DOUBLING AS STATION TRANSFORMER

WIPO Patent Application WO/2023/087435

A1

The present invention relates to an improved grounding transformer doubling as a station transformer, comprising: a grounding transformer secondary side; and a grounding transformer primary side comprising six primary side windings A1, A2, B1, B2, C1, and C2 that are wound on a three-phase core. Two of the primary side windings are distributed on each core column of the three-phase core, and the two primary side windings have an equal number of turns; the six primary side windings are wired in a Z-connection mode; the topological structure of the grounding transformer secondary side and the topological structure of the grounding transformer primary side are the same and are symmetrical to each other. According to the present invention, formulas I, II, and III of low-voltage output phase voltage vectors can successively be in phase with formulas IV, V, and VI of phase voltage vectors of high-voltage input side power grid voltage, respectively.

SHENG JIANKE (CN)
SHENG LIANGKE (CN)
ZHAN BAIQING (CN)
LUO WANLI (CN)
LI XIAOFENG (CN)
LIU XIANG (CN)
WANG ZHENGYUN (CN)

PCT/CN2021/136751

May 25, 2023

December 09, 2021

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GUANGDONG FULLDE ELECTRONICS CO LTD (CN)
ZHUZHOU FULLDE RAIL TRANSIT RES INST CO LTD (CN)
HUNAN FULLDE ELECTRICAL CO LTD (CN)

H01F27/30

WO2021169643A1

2021-09-02

CN102169749A	2011-08-31
CN104361982A	2015-02-18
CN105807137A	2016-07-27
CN201504101U	2010-06-09
GB595166A	1947-11-27

DONGGUAN CHUANGBO INTELLECTUAL PROPERTY AGENCY OFFICE (CN)

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