Abstract
In the view of the high complexity and a large amount of data of the electromagnetic transient model for the single wind generator, it is difficult to realize the multi-unit simulation modeling of large-scale wind farms by power system simulation software. In this paper, the simplified models of single direct drive and doubly-fed wind generator system are proposed, respectively. In order to study the output characteristics of the wind generator system, the components with small inertia constant in the electromagnetic transient model are neglected, and the shafting model, the converter model, and the control loops are simplified and reduced, respectively. Based on the study of the single electromagnetic transient model of wind generators, the simplified simulation models are built by the PSCAD (Power Systems Computer Aided Design) simulation platform, which are carried out under the conditions of constant wind speed, step wind speed, and fault. The output characteristics of the simplified models under different working conditions are compared in detail models. The simulation results show that, within the allowable calculation accuracy range, the dynamic response curves of the single simplified model and the electromagnetic transient model are consistent. The simulation speed can be significantly improved, the time consumption can be reduced, and the simulation speed can be increased more obviously when the number of simulation models increases. Therefore, it can be applied to the simulation research of multi-wind generators in large-scale wind farms.
Highlights
As energy and environmental issues become more severe, wind energy has been widely used in power systems due to its technological and cost advantages
In order to verify the correctness of the simplified model of a single direct-drive and doubly-fed wind generator based on PSCAD, simulation analysis was carried out under three conditions of constant wind speed, step wind speed, and fault
In order to verify the effectiveness of the simplified model in analyzing the dynamic process, the two types of wind generator models are run under step wind speed condition
Summary
As energy and environmental issues become more severe, wind energy has been widely used in power systems due to its technological and cost advantages. For the research of a single wind generator, one detailed electromagnetic transient simulation model can be established to comprehensively observe its response characteristics [4]. A large number of electromagnetic transient models will make the power system simulation model extremely complicated, which is not suitable for large-scale wind farm research. The clustering method could simulate the output characteristics of a large-scale wind farm, it sacrificed the characteristics of a single wind generation unit. According to the needs of studying the output characteristics of wind generators, in this paper, the simplified models of direct drive and doubly-fed wind generators are proposed, which are built based on the mathematical models. The verification shows that the application of the simplified models proposed in this paper to the simulation research of large-scale multi-unit wind farms has good results. They can be applied to large-scale multi-unit wind farms simulation research
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
