Criterion for the Electrical Resonance Stability of Offshore Wind Power Plants Connected Through HVDC Links

被引：57

作者：

Cheah-Mane, Marc ^{[1
]}

Sainz, Luis ^{[2
]}

Liang, Jun ^{[1
]}

Jenkins, Nick ^{[1
]}

Ugalde-Loo, Carlos Ernesto ^{[1
]}

机构：

[1] Cardiff Univ, Sch Engn, Cardiff CF24 3AA, S Glam, Wales

[2] Univ Politecn Cataluna, Dept Elect Engn, ETS Engn Ind Barcelona, E-08028 Barcelona, Spain

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2017年 / 32卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

Electrical resonance; HVDC converter; offshore wind power plant; positive-net-damping stability criterion; VSCS;

D O I：

10.1109/TPWRS.2017.2663111

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：

Electrical resonances may compromise the stability of HVDC-connected offshore wind power plants (OWPPs). In particular, an offshore HVDC converter can reduce the damping of an OWPP at low-frequency series resonances, leading to the system instability. The interaction between offshore HVDC converter control and electrical resonances of offshore grids is analyzed in this paper. An impedance-based representation of an OWPP is used to analyze the effect that offshore converters have on the resonant frequency of the offshore grid and on system stability. The positive-net-damping criterion, originally proposed for subsynchronous analysis, has been adapted to determine the stability of the HVDC-connected OWPP. The reformulated criterion enables the net damping of the electrical series resonance to be evaluated and establishes a clear relationship between electrical resonances of the HVDC-connected OWPPs and stability. The criterion is theoretically justified, with analytical expressions for low-frequency series resonances being obtained and stability conditions defined based on the total damping of the OWPP. Examples are used to show the influence that HVDC converter control parameters and the OWPP configuration have on stability. A root locus analysis and time-domain simulations in PSCAD/EMTDC are presented to verify the stability conditions.

引用

页码：4579 / 4589

页数：11