Evaluation of subsynchronous oscillation of Xiluodu right station - Guangdong double line ±500kV DC transmission project

Author

Yang Yu ; Qiu Wei ; Zhao Xiao-bin ; Deng Jing ; Wang Xi-tian

Author_Institution

CSG, Electr. Power Res. Inst., Guangzhou, China

fYear

2012

fDate

Oct. 30 2012-Nov. 2 2012

Firstpage

1

Lastpage

4

Abstract

HVDC transmission system may cause subsynchronous oscillation (SSO) in thermal generation units near rectifier station. Based on Xiluodu right station - Guangdong double line ±500kV DC transmission project and system conditions near rectifier station, the risk of subsynchronous oscillation (SSO) instability in nearby thermal generation units in Weixin Plant and Zhenxiong Plant is evaluated. In the first step the unit interaction factor (UIF) analysis method is used to seek out the operation conditions in which there are large turbine-generators prone to SSO instability. And the time-domain simulation method is used to further analyze the selected cases with UIF more than the threshold 0.05 in detail. The results shows that there is little risk under the nominal DC voltage conditions, but significant risk under the reduced DC voltage conditions for Xiluodu Project in 2013. SSDC is designed to mitigated the SSO instability for Xiluodu Project. Time domain simulation tests have been done to verified the SSDC effectiveness.

Keywords

HVDC power transmission; power system stability; rectifier substations; thermal power stations; time-domain analysis; turbogenerators; Guangdong double-line DC transmission project; HVDC transmission system; SSDC effectiveness; SSO instability mitigation; UIF analysis method; Weixin plant; Xiluodu Project; Xiluodu project; Xiluodu right station; Zhenxiong plant; nominal DC voltage conditions; rectifier station; reduced DC voltage conditions; subsynchronous oscillation instability; system conditions; thermal generation units; time-domain simulation method; turbine-generators; unit interaction factor analysis method; Damping; Generators; HVDC transmission; Oscillators; Rectifiers; Substations; Time domain analysis; damping controller (SSDC); double circuit DC transmission line on the same tower; subsynchronous; subsynchronous oscillation (SSO); time-domain simulation; unit interaction factor (UIF);

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology (POWERCON), 2012 IEEE International Conference on

Conference_Location

Auckland

Print_ISBN

978-1-4673-2868-5

Type

conf

DOI

10.1109/PowerCon.2012.6401327

Filename

6401327