Instability of Wind Turbine Converters during Current Injection to Low Voltage Grid Faults and PLL Frequency Based Stability Solution

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

266 Citationer (Scopus)

Abstract

In recent grid codes for wind power integration, wind turbines are required to stay connected during grid faults even when the grid voltage drops down to zero; and also to inject reactive current in proportion to the voltage drop. However, a physical fact, instability of grid-connected converters during current injection to very low (close to zero) voltage faults, has been omitted, i.e., failed to be noticed in the previous wind power studies and grid code revisions. In this paper, the instability of grid side converters of wind turbines defined as loss of synchronism (LOS), where the wind turbines lose synchronism with the grid fundamental frequency (e.g., 50 Hz) during very deep voltage sags, is explored with its theory, analyzed and a novel stability solution based on PLL frequency is proposed; and both are verified with power system simulations and by experiments on a grid-connected converter setup.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Systems
Vol/bind29
Udgave nummer4
Sider (fra-til)1683-1691
Antal sider9
ISSN0885-8950
DOI
StatusUdgivet - 9 jan. 2014

Fingeraftryk

Dyk ned i forskningsemnerne om 'Instability of Wind Turbine Converters during Current Injection to Low Voltage Grid Faults and PLL Frequency Based Stability Solution'. Sammen danner de et unikt fingeraftryk.

Citationsformater