Regional AVC Coordinating Control Strategy for Large-Scale Cascading Trip-off Prevention of Wind Turbines

doi:10.3969/j.issn.1000－7229.2014.01.015

Abstract

Abstract:

Large-scale cascading trip-off of wind turbine has become the new problem during the fast development of wind farm. Aiming at the cascading trip-off failures frequently occurring in Jiuquan wind farm, this paper analyzed the typical development process and time-spatial frame of the failures to find the main reason. Based on this, according to the fluctuation of wind power and the step changes of voltage caused by fixed reactive power compensation switching, the coordination control models and strategies of regional automatic voltage control （AVC） were proposed. Finally, the steady-state voltage analysis was carried out based on the real operation data of Hexi power grid, and the feasibility and effectiveness of the proposed models and strategies were verified through the control effect simulation of ‘2-24’ trip-off failure in Jiuquan.

Key words: wind turbines, cascading trip-off, regional AVC, coordination control

WANG Jiaming1, WANG Zhidong1, LI Hui1, DU Bo2. Regional AVC Coordinating Control Strategy for Large-Scale Cascading Trip-off Prevention of Wind Turbines[J]. ELECTRIC POWER CONSTRUCTION, 2014, 35(1): 78-83.

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