Modeling and fault characteristics analysis of doubly fed induction generator incorporating crowbar protection

الملخص EN

-The most widely used electrical energy plays the vital role in development and economy of any country as per capita use of energy straight linked with living standard.

However, this energy is extensively produced by fossil fuels which are not only declining rapidly but also a threat to ecology system.

Therefore, it encourages to project towards green society by incorporating more and more renewable energy in the system.

Sustainability and cost-effectiveness of wind makes it most promising technology than the rest of renewable energy sources but uncertainty and variability makes it difficult to integrate in the system.

Therefore, doubly fed induction generator (DFIG) which exhibits variable speed is required to address above issues.

In this work, a stator flux oriented vector control technique is used to perform a decoupled control of active and reactive power.

The DFIG power converter is protected by employing crowbar protection while short circuit which affects the fault characteristics.

Thus, the symmetrical fault (ABC) and asymmetrical fault (BC) characteristics are analyzed while the protection system (Crowbar) is active and inactive.

It was observed when asymmetric fault occurs on the collection line, the current of healthy phase is also increased at the turbine side and during symmetrical fault positive and negative sequence impedances of DFIG are not equal, unlike the traditional system.