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Title:
TRANSFORMER-LESS STATIC SYNCHRONOUS SERIES COMPENSATOR AND PROTECTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/000224
Kind Code:
A1
Abstract:
A transformer-less static synchronous series compensator (SSSC) for an AC electrical power transmission system having a transmission line carrying an AC current and a method for protection against electrical damage are provided. The transformer-less SSSC including: a voltage source converter (100) having a DC input and an AC output and being configured to generate an alternating voltage with controllable magnitude and controllable phase angle across the AC output, the AC output being configured to inject the generated alternating voltage into a phase of the transmission line; a filter circuit (101) being arranged coupled with the voltage source converter (100) in parallel across the AC output of the voltage source converter (100); a bypass circuit (102); and an electrical current limiting circuit (103) being coupled with the bypass circuit (102) in series; wherein: the series-coupled current bypass circuit (102) and electrical current limiting circuit (103) are coupled with a first capacitive element (1011) of the filter circuit (101) in parallel. The transient nature of the electrical current limiting circuit (103) will limit the increase in the current flowing through the thyristor of the bypass circuit (102) thus limit the current peak when the bypass circuit (102) is switched on. Consequently, the current limiting circuit (103) acts like limiting the current transients generated from the influences of both of the line fault current and the discharging current.

Inventors:
XIE, Hailian (Hongyuan Apartment B2106, No. 4 Jiuxianqiao Road Chaoyang District, Beijing 5, 100015, CN)
LI, Tinho (Room 2609, Lung Wan House Lung Poon Court, Diamond Hill,Kowloon, Hong Kong, Kong, CN)
Application Number:
CN2015/082836
Publication Date:
January 05, 2017
Filing Date:
June 30, 2015
Export Citation:
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Assignee:
ABB TECHNOLOGY LTD (Affolternstrasse 44, Zurich, Zurich, CH)
XIE, Hailian (Hongyuan Apartment B2106, No. 4 Jiuxianqiao Road Chaoyang District, Beijing 5, 100015, CN)
LI, Tinho (Room 2609, Lung Wan House Lung Poon Court, Diamond Hill,Kowloon, Hong Kong, Kong, CN)
International Classes:
H02J3/18
Domestic Patent References:
2010-09-02
Foreign References:
CN102931667A2013-02-13
CN103606951A2014-02-26
CN102064555A2011-05-18
CN101346868A2009-01-14
Attorney, Agent or Firm:
BOSS & YOUNG PATENT AND TRADEMARK LAW OFFICE (5/F, Tower A Bldg. No. 1, GT International Center, Jia 3 Yongandongli, Jianguomenwai Avenue, Chaoyang District, Beijing 2, 100022, CN)
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