An Overview of Doubly-fed Induction Generator Models for Wind Energy Conversion Systems

摘要

In this paper, the modeling of doubly-fed induction generators (DFIG) for wind energy conversion systems is discussed. The concept of variable speed operation employed by DFIG systems has been widely accepted for wind power generating systems because of its many advantages such ability to extract maximum power at all wind speeds and independent control of active and reactive power. Today, many such wind farms are in operation and DFIG forms an essential component in the modeling of such wind farms. With increasing wind penetration in power systems, many national grid codes will demand comprehensive models and simulation studies of such generators under different power system conditions. In order to study the interaction between the wind farm and power system, increasingly comprehensive studies are necessary that require accurate models of DFIG systems. This paper presents an overview of DFIG models for various categories of power system phenomena, namely: steady-state, sub-transient (electromagnetic transient) and transient (electromechanical transient).