Low voltage level of wind turbine generator

Why is low voltage ride through important in wind energy conversion system?

The high penetration of grid connected wind energy has emerged as a recent trend in many countries. On the other hand, the problem of power generation loss due to the grid fault also arisen. The recent technological advancement suggests the importance of low voltage ride through (LVRT) in wind energy conversion system (WECS).

What are LVRT requirements in wind power?

There are two important requirements in wind power: reactive power control during normal operating conditions and Low Voltage Ride Through (LVRT) capability requirements during fault conditions . LVRT is an imperative capability for wind turbines to ensure its grid security .

What voltage does a wind turbine use?

A modern wind turbine is often equipped with a transformer stepping up the generator terminal voltage, usually a voltage below 1 kV (E.g. 575 or 690 V), to a medium voltage around 20-30 kV, for the local electrical connection within a wind farm (distribution level).

What is LVRT in wind turbine generators?

However, LVRT is a technique in making uninterrupted connectivity of WECS in the presence of grid fault. This paper presents the state of the art of LVRT capabilities of various wind turbine generators using FACTS devices and different converter controllers.

Can fixed-speed wind turbines improve LVRT capability?

This paper presented the comprehensive review of the state-of-the-art developments for LVRT capability improvement of WTs based on fixed-speed wind turbines, which is relatively a new concept in maintaining voltage profile of the wind power generation.

Do PMSG based wind turbines have LVRT capability?

PMSG based turbines have a better LVRT capability due to the full-scale power converters employed and mostly prefer software or control based LVRT solutions. Some of the old wind turbines of up to 700 kW and with stall regulation, the provision of putting add on LVRT is technically not possible.