Dips Detection Techniques Discussion

In today's industrial world, renewable energy represents 16% of the total produced and consumed energy. Wind energy is gaining popularity and imposing bigger footprint in the natural sources of electricity and plays a key building block for economic recovery from the impact of COVID-19 according to the Global wind Energy Council. Yet, because its presence in the energy resource share is below 5%, since most of the wind farms use Doubly Fed Induction Generator (DFIG) it will suffer from grids faults such as symmetric dips. The scary part of the dips is that it will increase the currents at the back-to-back converters and even when dealing with them oscillation might destroy the turbine and generator assembly. In this paper we will review techniques used to detect the dips and override the heavy increase of the current using a crowbar, we will concentrate only on the detection and compare the resulting parameters while keeping the controllers and the value of the crowbar resistance unchanged.