The Development of Precision 500/√3-kV Two-Stage Voltage Transformer With High-Voltage Excitation

被引：2

作者：

Liu, Hao ^{[1
,2
]}

Zhou, Feng ^{[2
]}

Chen, Lixue ^{[3
]}

Lei, Min ^{[2
]}

Yin, Xiaodong ^{[2
,4
]}

Jiang, Chunyang ^{[2
]}

Liu, Jian ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol HUST, Sch Elect & Elect Engn SEEE, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China

[2] China Elect Power Res Inst, Wuhan 430074, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol HUST, Sch Elect & Elect Engn SEEE, Wuhan 430074, Hubei, Peoples R China

[4] Wuhan Univ, Wuhan 430072, Hubei, Peoples R China

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2021年 / 70卷

关键词：

High voltage; high-voltage excitation; precision measurements; two-stage voltage transformer (VT); voltage coefficient; HZ;

D O I：

10.1109/TIM.2021.3053979

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Two-stage voltage transformer (VT) based on high-voltage excitation is usually less than 10 kV due to insulation limitation. To develop a two-stage VT with high-voltage excitation above 10 kV, this article designed two feasible structures. By calculating and comparing the lengths of the magnetic path, a better structural scheme was selected. The excitation winding and the precise ratio winding are in an "up-and-down" structure. This makes it work at a higher voltage possible. Moreover, a flexible compensation circuit was added to the secondary of this two-stage VT to acquire higher accuracy. Based on the principle, a 500/root 3-kV two-stage VT has been developed. The half-symmetry summation method was used to calibrate this two-stage VT. The measurement results indicate that the voltage coefficient is very low. The error is (-2.2 to +3.1) mu V/V for the ratio error and (-2.6 to -0.2) mu rad for the phase displacement in the range of (20%-120%) rated voltage.

引用

页码：1 / 7

页数：7