Title:
VACUUM ON-LOAD TAP CHANGER TEST SYSTEM AND HARMONIC CURRENT SOURCE
Document Type and Number:
WIPO Patent Application WO/2023/231278
Kind Code:
A1
Abstract:
The present application discloses a vacuum on-load tap changer test system. The system comprises a fundamental power supply (100) and a harmonic current source (200); the fundamental power supply (100) is used for generating a fundamental current; the harmonic current source (200) comprises a rectifier circuit (201), an inverter circuit (202), and a harmonic current control circuit (203); an input end of the rectifier circuit (201) is connected to an alternating current power supply, and an output end of the rectifier circuit (201) is connected to an input end of the inverter circuit (202); an output end of the inverter circuit (202) is connected to an input end of the harmonic current control circuit (203); an output end of the harmonic current control circuit (203) is adapted to be connected to a vacuum on-load tap changer; the fundamental power supply (100) is used for generating a fundamental current; the rectifier circuit (201) is used for converting an alternating current into a direct current; the inverter circuit (202) is used for converting the direct current into a harmonic current according to a preset harmonic current order; the harmonic current control circuit (203) is used for adjusting the amplitude and phase of the harmonic current according to target slope of a current zero-crossing point, so that the fundamental current and the harmonic current are superimposed and output to the vacuum on-load tap changer.
Inventors:
ZHANG CHANGHONG (CN)
DENG JUN (CN)
LV JINZHUANG (CN)
XIA GULIN (CN)
ZHOU HAIBIN (CN)
ZHANG LIANG (CN)
XIE ZHICHENG (CN)
LI WEIGUO (CN)
PAN ZHICHENG (CN)
YANG XU (CN)
ZHANG JINYIN (CN)
WANG HAIJUN (CN)
CHEN WEI (CN)
LI SHIJIE (CN)
CHEN WEI (CN)
ZHANG YINING (CN)
DENG JUN (CN)
LV JINZHUANG (CN)
XIA GULIN (CN)
ZHOU HAIBIN (CN)
ZHANG LIANG (CN)
XIE ZHICHENG (CN)
LI WEIGUO (CN)
PAN ZHICHENG (CN)
YANG XU (CN)
ZHANG JINYIN (CN)
WANG HAIJUN (CN)
CHEN WEI (CN)
LI SHIJIE (CN)
CHEN WEI (CN)
ZHANG YINING (CN)
Application Number:
PCT/CN2022/126954
Publication Date:
December 07, 2023
Filing Date:
October 24, 2022
Export Citation:
Assignee:
MAINTENANCE & TEST CENTRE CSG EHV POWER TRANS COMPANY (CN)
International Classes:
H02M5/458; G01R31/327; H02M1/08; H02M1/32
Foreign References:
| CN101064479A | 2007-10-31 | |||
| CN107248743A | 2017-10-13 | |||
| CN108344941A | 2018-07-31 | |||
| CN106772003A | 2017-05-31 | |||
| JPS60185178A | 1985-09-20 |
Other References:
YAO SHI, ZHOU CHUANG; XU ZHAODAN; QIN ZHIXIAN; WU RENNENG: "Development of a Testing Device for Transformer On-load Tap Changer Based on AC and DC Characteristics", ELECTRIC ENGINEERING, vol. 4, 25 February 2022 (2022-02-25), pages 129 - 130, 133, XP093116435
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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