PROJECT TITLE :

Battery Connected DFIG Wind System Analysis forStrong/Weak Grid Scenarios - 2016

ABSTRACT:

The paper helps to understand the performance of the grid with battery and doubly-fed induction generator (DFIG) wind turbines when operating in an exceedingly weak grid situation with a low short circuit ratio (SCR). The concept will analyze the performance of the grid with battery connected DFIG each in steady state and transient scenario. The grid can be represented as a Thevenin equivalent circuit and is rated at twelve.5 kV. A battery system and a wind system are connected at the purpose of common coupling (PCC). The battery system being modeled in PSCAD software is rated at one MW/1 MWh and the wind system model is rated at two MW. The grid has been characterised and analyzed based on 2 categories: sturdy grid and weak grid. A grid is considered to be weak when the flow of active and reactive power within the network causes a vital amount of voltage fluctuation at the purpose of common coupling. A grid is considered to be robust when the grid is stable with allowable nominal deviations with voltage and frequency. The strength of the grid will be measured by taking the ratio of grid's short circuit power with grid nominal power.