Analysis of control interaction between D-PMSGs-based wind farm and SVC

Abstract

According to an accident analysis report, with regard to sub-synchronous oscillation (SSO) in Xinjiang, China, dynamic reactive compensation devices have great influence on the existence of sub-synchronous harmonics. This paper based on the practical phenomenon for further study, focuses on the interaction between direct-drive permanent synchronous generators (D-PMSGs)-based wind farm and static var compensator (SVC). Detailed electro-magnetic transient simulation model, such as D-PMSGs-based wind farm compensated by SVC, is established in PSCAD/EMTDC. Time-domain simulation results demonstrate that there is interaction between D-PMSGs-based wind farm and SVC, which is closely related with the control parameters of SVC and D-PMSGs-based wind farm. This type of control interaction will lead to sub-synchronous oscillation. Therefore, the influence of above control parameters on the oscillation characteristics is further studied here. The practical significance of this paper is indicating the necessity of coordinating and optimising control parameters in large-scale wind farm.

Keywords

• permanent magnet generators
• time-domain analysis
• power generation control
• power grids
• wind power plants
• synchronous generators
• static VAr compensators
• power generation faults
• compensation
• control interaction
• D-PMSGs-based wind farm
• SVC
• sub-synchronous oscillation
• direct-drive permanent synchronous generators
• control parameters
• large-scale wind farm