Reactive power penetration limit of a wind farm when connected to a weak power system

Author(s): A Sanelatha, K Nagasakab
a Electrical and Electronic Engineering Department, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Tokyo 184-8588, Japan
b Supervisor Professor of Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Tokyo 184-8588, Japan
International Journal of Smart Grid and Clean Energy, vol. 9, no. 6, November 2020: pp. 949-957
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.6.949-957

Abstract: When a wind farm (hereafter, WF) is connected to a weak grid, the linked bus voltage of the system rises above the specified value, and the reactive power is consumed, so the security and stability of the power system may be affected. In this research, we aim to solve the problem of reactive power shortage due to voltage fluctuation when a mega WF is linked to a weak gird. First, we investigated the optimal Wind Turbine (hereafter, WT) selection on MATLAB/Simulink and designed the WF. Next, we used MATLAB/Simulink and IEEE 30 Bus Test System to investigate the penetration limits of WF and its influences on weak grid using three cases. As results, Vestas V100:1.8MW (Doubly Fed Induction Generator: DFIG) became the optimal for our study and the capacity of mega WF became 54MW. Therefore, the penetration limits of WF to each case are measured and revealed in this paper.

Keywords: IEEE 30 bus test system, Mega Wind Farm (WF), weak grid, penetration limits
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