SSR analysis of DFIG-Based wind farm with VSM control strategy

Research output: Contribution to journalArticle

Authors

  • Kanghui Gu
  • Feng Wu
  • Ping Ju
  • Haiqiang Zhou
  • Jiajie Luo

Abstract

The wind turbine is usually integrated into the power grid via back to back converter, and the inertia is decreased. Virtual synchronous machine (VSM) control was proposed to improve inertia of the wind farm. While for the doubly-fed induction generator (DFIG)-based wind farm with traditional control strategy, sub-synchronous resonance (SSR) has become a significant problem when it is connected to series compensation transmission lines. Therefore, the impacts of VSM control strategy for DFIG on SSR need to be investigated. In this paper, a detailed small-signal stability analysis model of the VSM control strategy is first established and eigenvalue analysis is then carried out. SSR in the wind farm with the VSM control under different series compensation levels, controller parameters and wind speeds is analyzed, and it is also compared to that in the wind farm with the conventional vector control strategy (VC). Simulations are performed in PSCAD/EMTDC to verify the result of SSR analysis.

Details

Original languageEnglish
Pages (from-to)118702-118711
Number of pages10
JournalIEEE Access
Volume7
Publication statusPublished - 22 Aug 2019