Dynamic interaction between synchronous machine and DC‐power‐modulated LCC in electromechanical timescale. Issue 16 (6th February 2019)

• Record Type: Journal Article
• Authors: Hou, Jiazuo; Ma, Shicong; Gong, Xuan; Hu, Jiabing
• Is Part Of: Journal of engineering. Volume 2019:Issue 16(2019)
• Page Start: 1864
• Page End: 1868
• Publication Date: 2019-02-06
• Subjects: eigenvalues and eigenfunctions -- HVDC power convertors -- oscillations -- damping -- HVDC power transmission -- synchronous machines; DC‐power‐modulated LCC -- low‐frequency oscillation -- synchronous machine -- electromechanical timescale -- active power modulation -- damping effects -- line‐commutated converter -- high‐voltage direct current system -- HVDC system -- MATLAB‐Simulink -- small‐signal model -- motion equation concept; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.8735
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : Active power modulation of line‐commutated converter (LCC)‐based high‐voltage direct current (HVDC) system is increasingly utilised, especially for the case of damping low‐frequency oscillation associated with synchronous machine (SM) in electromechanical timescale (around 1 Hz). Many papers have tried to analyse the mechanism of damping effects, but almost rely on numerical studies, which cannot reveal the dynamic interaction between SM and DC‐power‐modulated LCC. This study proposes a small‐signal model of DC‐power‐modulated LCC based on motion equation concept. With this model, analytical investigation of low‐frequency oscillation from the scope of damping and synchronising powers is presented. Comparisons of analytical results and eigenvalues draw some general conclusions which offer insight into the dynamic behaviour. By examining the case of an SM connected to a DC‐power‐modulated LCC, simulations in MATLAB/Simulink are conducted to verify the analytical results.