Wide frequency range active damping of LCL-filtered grid-connected converters

The Journal of Engineering

Mark Sumner¹  Mohamed Rashed²  Abdelhady Ghanem²  Ibrahim. I. I. Mansy²  Mohamed Adel El-sayes² 

[1] Department of Electrical and Electronics Engineering, University of Nottingham;Electrical Engineering Department, Mansoura University;

关键词: frequency-domain analysis;    power convertors;    power filters;    power grids;    electric current control;    damping;    power system stability;    feedback;    voltage control;    multiple resonances;    LCL-filtered grid-connected converters;    wide frequency range active damping;    parallel grid-connected converters;    single grid-connected converters;    frequency domain analysis;    controller stability;    wide frequency active damping;    multiple resonance frequencies;    capacitor voltage feedback;    power converters;    multiple resonance effects;    active damping technique;   

DOI  :  10.1049/joe.2018.8164

来源: DOAJ

【 摘 要 】

It can be challenging to guarantee the stability of grids with many converters with LCL filters connected due to the presence of multiple resonances within the system. This paper presents an active damping technique to mitigate multiple resonance effects and harmonics in power converters connected to weak grids. The proposed technique employs grid current and capacitor voltage feedback to achieve active damping for a wide range of multiple resonance frequencies. The effectiveness of the proposed wide frequency active damping and improved controller stability is demonstrated through frequency domain analysis and experimental results for single and parallel grid-connected converters.

【 授权许可】

Unknown