Centralized wind power generation system

The successful coordination between wind turbines and system operators is accomplished by using a centralized wind farm control system. The wind farm control system acts as a central part of the system and distributes active power references among wind turbines.

However, the traditional power system generation units are centralized located synchronous generators with different characteristics compared with wind turbines. This paper presents an overview of the issues about integrating large-scale wind power plants into modern power systems.

In wind generation systems, the wind turbine, the electrical generator and the grid-interfaced converters are three key components that have been developed in the past 30 years32,33. The turbine converts wind energy into mechanical energy.

centralized generated system has a central location of power being generated before the generated power is transmitted, distributed and therefore made available to consumers. Clearly, power generated at the central station cannot be same as the total sum of power supplied to consumers.

Two typical configurations of power electronic converter-based wind turbine generation systems have been widely adopted in modern wind power applications: type 3 wind generation systems with doubly fed induction generators (DFIGs) (Fig. 2a); and type 4 wind generation systems with permanent magnet synchronous generators (PMSGs) (Fig. 2b).

To support the power system operation and control, the generation units are required to be able to increase or decrease power output with falling or rising frequency. During an over-frequency, the power output can be reduced by shutting down some wind turbines in a wind farm or by controlling wind turbines, such as pitching.