Abstract
The objective of this paper is to perform a hybrid design for an Adaptive Neuro-Fuzzy Inference System (ANFIS) optimized by Particle Swarm Optimization (PSO) to improve the dynamic voltage stability of a grid-connected wind power system. An onshore 99.2MW wind farm using Doubly Fed Induction Generator (DFIG) is studied. To compensate the reactive power absorbed from the power grid of the wind farm, a Static VAR Compensator (SVC) is proposed. To demonstrate the performance of the proposed hybrid PSO–ANFIS controller, simulations of the voltage response in time-domain are performed in Matlab to evaluate the effectiveness of the designed controller. From the results, it can be concluded that the proposed hybrid PSO-optimized ANFIS-based model can be applied to enhance the dynamic voltage stability of the studied grid-connected wind power system.
Highlights
Renewable energy is important nowadays and wind generators or solar panels are used in many countries, while wind generators are applied more widely than before
In relevance to a wind generator, Doubly Fed Induction Generator (DFIG) is the most prevalent generator because of its high efficiency compared to other types of wind generators such as permanent magnet synchronous generator (PMSG) and induction generator (IG) [1]
Authors showed that with the proposed storage system, voltage drops, and harmonic voltage and current distortion at the wind farm output can be improved when a short circuit occurs in the connection with the power grid
Summary
Renewable energy is important nowadays and wind generators or solar panels are used in many countries, while wind generators are applied more widely than before. The output power of the wind generators can be connected to form a wind farm and they can feed a power grid using a step-up transformer. The randomness of wind energy affects the power quality of the connected power systems. In [5], a power quality study of a large-scale wind farm with and without storage was studied. Authors showed that with the proposed storage system, voltage drops, and harmonic voltage and current distortion at the wind farm output can be improved when a short circuit occurs in the connection with the power grid. The SVC is located in the middle of the transmission line to reduce the oscillation of the system and improve grid stability [8, 9]
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