Novel LVRT Testing Method for Wind Turbines Using Flexible VSC Technology
Journal article, 2015

Wind energy is one of the fastest growing renewable energy sources. For this reason, several countries have included requirements in their grid codes to guarantee proper operation of wind turbines under stable operations of the power systems as well as under grid disturbances. This paper presents a novel methodology for grid code testing of wind turbines based on voltage source converter (VSC) technology. In particular, this paper focuses on a low voltage ride through (LVRT) test of a full size converter-based wind turbine. The investigated testing setup consists of a 4-MW wind turbine and an 8-MW back-to-back VSC system, operated as test equipment. The control algorithm of the testing device is derived in detail and validated through time-domain simulations. The risk of poorly damped resonances and possible interaction between the testing equipment and the tested object is investigated through small signal analysis. The obtained results demonstrate the flexibility of the proposed approach in controlling the voltage at the wind turbine terminals, including the ability in emulating the short-circuit impedance of the grid at the connection point.

wind power

low voltage ride through (LVRT)

Engineering

voltage source converter (VSC) control

Electrical & Electronic

Energy & Fuels

Grid codes

Author

Nicolas Espinoza

Chalmers, Energy and Environment, Electric Power Engineering

Massimo Bongiorno

Chalmers, Energy and Environment, Electric Power Engineering

Ola Carlson

Chalmers, Energy and Environment, Electric Power Engineering

IEEE Transactions on Sustainable Energy

1949-3029 (ISSN)

Vol. 6 3 1140-1149

Driving Forces

Sustainable development

Areas of Advance

Energy

Subject Categories

Energy Systems

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/tste.2015.2427392

More information

Created

10/7/2017