Study on the Subsynchronous Resonance Control Method Based on the DFIG Grid-Side Converter

2018 2nd International Conference on Power and Energy Engineering

Yin, M.X.^1,2 ; Liu, H.^1,3 ; Li, Y.H.^1,3 ; Song, W.^2

State Grid Jibei Electric Power Research Institute, North China Electric Power Research Institute Co. Ltd., Beijing

100045, China^1

Department of Electrical and Electronic Engineering, North China Electric Power University, Baoding, China^2

Grid-connected Opeartion Technol. for Wind-Solar-Storage Hybrid Syst. State Grid Corp. Key Lab., Beijing

100045, China^3

关键词: Electromagnetic torques;    Grid-side converter;    Matlab simulations;    Rotor torque;    Subsynchronous resonance;    Supplementary damping;    Supplementary damping controllers;    Torque variations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/192/1/012001/pdf
DOI  :  10.1088/1755-1315/192/1/012001

来源: IOP

【 摘 要 】

DFIG-based series-compensated can increase the capacity of wind power transmission, but it can also cause the sub-synchronous resonance (SSR) problem. Based on the mechanism of subsynchronous resonance in DFIG, the electromagnetic torque variation under the variation of rotor speed can be divided into two parts, i.e. rotor torque variation and stator torque variation. Supplementary controller is added to the stator side converter, which is generated to provide positive damping. MATLAB simulation is carried out to compare the result of supplementary damping. Results show that supplementary damping controller makes DFIG keep stable under various rotor speeds and RSC inner-loop gain.