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Title:
SHIELDING EQUALIZER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/188166
Kind Code:
A1
Abstract:
A shielding equalizer circuit, comprising a main circuit and an auxiliary circuit connected in parallel to the main circuit. The main circuit comprises a thyristor level equivalent circuit, capacitances to ground of metal terminals, and saturated reactor equivalent circuits. The auxiliary circuit comprises M π-shaped circuits successively connected in series. A potential fixed point of a shielding cover is electrically isolated from the main circuit, and only the head and tail ends of a converter valve are electrically connected to the shielding cover, so that current leakage effect of stray capacitance to ground in the converter valve is shielded, and uniform voltage distribution of large-scale series-connected thyristors in a wide frequency range is implemented. Under the impact of steep waves, the non-uniformity of thyristor voltages is lower than 1%, and the largest voltage steepness is reduced to 6.8 kV/μs, voltage distortion of key components of the converter valve in a wide frequency domain can be avoided, and the reliability and insulation tolerability of the components are improved.

Inventors:
TANG, Guangfu (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
GAO, Chong (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
HE, Zhiyuan (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
ZHA, Kunpeng (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
ZHOU, Jianhui (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
SHENG, Caiwang (No.270 Shunsha Road, Dadongliu Village Xiaotangshan Town, Changping District, Beijing 1, 102211, CN)
Application Number:
CN2017/085347
Publication Date:
October 18, 2018
Filing Date:
June 12, 2017
Export Citation:
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Assignee:
GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE CO., LTD. (18 Binhe Ave, Future Science ParkChangping District, Beijing 1, 102211, CN)
STATE GRID CORPORATION OF CHINA (No.86 Chang'an West Street, Xicheng District, Beijing 1, 100031, CN)
International Classes:
H02M1/00
Foreign References:
CN102723879A2012-10-10
CN103048595A2013-04-17
CN101937484A2011-01-05
CN106526446A2017-03-22
CN101923593A2010-12-22
DE19850840A12000-05-18
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (2nd Floor, Zhongguancun Intellectual Property Building Block B,No.21 Haidian South Road, Haidian District, Beijing 0, 100080, CN)
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