Evaluation of damping of subsynchronous interaction between direct-drive wind farm and LCC-HVDC based on the damping path analysis. (January 2023)

• Record Type: Journal Article
• Authors: Gao, Benfeng; Deng, Pengcheng; Wang, Yi; Yu, Hongyang; Ren, Bixing
• Is Part Of: International journal of electrical power & energy systems. Volume 144(2023)
• Publication Date: 2023-01
• Subjects: LCC-HVDC -- Subsynchronous interaction -- Damping path analysis -- Damping evaluation; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2022.108532
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: The damping path analysis method is proposed to study the subsynchronous interaction mechanism between direct-drive wind farm and LCC-HVDC. Damping torque analysis is extended to analyze the SSO mode dominated by PLL. The disturbance transfer process between the subsystems is revealed by damping path analysis. Damping path of the interaction between direct-drive wind farm and LCC-HVDC is separated and evaluated by corresponding damping torque coefficients. The impact of the controller parameters on the SSO mode damping are analyzed. Abstract: The interaction between direct-drive wind farm (DDWF) and LCC-HVDC may make the power system more prone to subsynchronous oscillation (SSO). This paper presents a damping path analysis method to analyze and evaluate the subsynchronous interaction between them from the perspective of the internal disturbance transfer of the system. First, damping torque analysis (DTA) is extended to the SSO mode dominated by phase-locked loop (PLL), and the stability of the DDWF with the LCC-HVDC (DDWFL) system is analyzed. Then based on the closed-loop transfer function block diagram of the DDWFL system, the disturbance transfer process between DDWF and LCC-HVDC is revealed to analyze the interaction mechanism in the SSO mode, and the closed-loop disturbance transfer paths that reflect the system damping are called the damping paths. Further, damping path of the subsynchronous interaction between DDWF and LCC-HVDC is separated, and its effect on the SSO mode damping is evaluated by damping coefficient. It is concluded that the SSO mode dominated by PLL has instability risk in the DDWFL system, and the subsynchronous interaction between DDWF and LCC-HVDC provides negative damping to the system. Finally, the time domain simulation results demonstrate the validation of damping evaluation based on damping path analysis.