Stability Analysis of Large Wind Farms Connected to Weak AC Networks Incorporating PLL Dynamics

Givaki, K.; Xu, Lie

Abstract

Voltage source converter interfaced wind turbines connected to weak grids can induce system instability. A state space model is used in this paper to study the stability of large wind farms. Dynamics of the phase locked loop is integrated to the state space model. The advantage of this model is that it allows study the stability of systems with parallel wind turbines. Studies on the dynamic responses of the system show the importance of including phase locked loop as its existence can induce system instability especially under weak network conditions. This model can be used to study the stability of converter interfaced wind farms and helps to design the converter controller to ensure wind farm system stability when connected to weak grids.

Citation

Givaki, K., & Xu, L. (2016). Stability Analysis of Large Wind Farms Connected to Weak AC Networks Incorporating PLL Dynamics. In International Conference on Renewable Power Generation (RPG 2015). https://doi.org/10.1049/cp.2015.0440

• Conference Name: International Conference on Renewable Power Generation (RPG 2015)
• Start Date: Oct 17, 2015
• End Date: Mar 18, 2015
• Acceptance Date: Oct 17, 2015
• Online Publication Date: Apr 7, 2016
• Publication Date: Apr 7, 2016
• Deposit Date: Jul 30, 2018
• Publicly Available Date: Jul 31, 2018
• Publisher: Institute of Electrical and Electronics Engineers
• Book Title: International Conference on Renewable Power Generation (RPG 2015)
• ISBN: 9781785610400; 9781785610417
• DOI: https://doi.org/10.1049/cp.2015.0440
• Keywords: Phase locked loop, stability, vector current control, voltage source converter, wind farm
• Public URL: http://researchrepository.napier.ac.uk/Output/1139422