Circulating wind power generation system

Are there still circulating currents left in wind power generation systems?

Consequently, there are still some circulating currents left. Parallel operation is an effective way to improve the capacity of full power converters in wind power generation systems, but it causes the circulating current problem.

What is the topology of a parallel full-scale wind power generation system?

The topology of a parallel full-scale wind power generation system is shown in Fig. 1. It consists of a wind turbine, a generator and a full-scale converter. The wind turbine captures wind energy.

Can multiphase generators meet emerging requirements of wind power generation?

The multiphase generators could meet emerging requirements of the modern wind power generation. Different types of the multiphase converter topologies in wind power conversion are presented. Various kinds of modeling and control methods of the multiphase wind power generation are reviewed.

How many generations of wind turbines are there?

So far, there are three generations of wind turbines applied in wind farms [7, 8]: Directly grid-connected fixed-speed wind turbine based on a squirrel cage induction generator (SCIG).

Are circulating currents a disturbance to the load currents of a parallel system?

Actually, circulating currents can be regarded as a kind of disturbance to the load currents of a parallel system. Based on this idea, a novel control strategy based on circulating current feed-forward compensation for parallel full-scale wind power converters is proposed in this paper, and the feed-forward controller is designed.

How can circulating current control be implemented?

The proposed circulating current control can be implemented by the following procedures. First, the three-phase circulating currents of the parallel converter system can be calculated through measurement of the ac output currents of each parallel converter.