Fault diagnosis of three-parallel voltage-source converter for a high-power wind turbine

Title
Fault diagnosis of three-parallel voltage-source converter for a high-power wind turbine
Author(s)
이동춘고영종[고영종]이교범[이교범]김장목[김장목]
Keywords
SYSTEM
Issue Date
201208
Publisher
INST ENGINEERING TECHNOLOGY-IET
Citation
IET POWER ELECTRONICS, v.5, no.7, pp.1058 - 1067
Abstract
A fault detection method for the switch devices of three-parallel power converters in a wind-turbine system is presented. The proposed method utilises the measured three-phase currents (i(a)(s), i(b)(s), i(c)(s)) that were already used for controlling the converters. Additional current and voltage sensors are thus not necessary. Consequently, this particular feature potentially cuts costs to apply the detection algorithm. The three-phase currents are transformed to a stationary reference frame (i(d)(s), i(q)(s)). This reference frame possesses specific patterns in accordance to the conditions of the switch devices in the converter. Faulty switches can be detected by analysing the obtained pattern and pattern recognition is achieved by a neural network that has a learning capability. The proposed method is primarily able to diagnose an open fault switch in the converter. The reliability of the proposed fault detection method was proved by simulations and experiments using a 10 kW simulator.
URI
http://hdl.handle.net/YU.REPOSITORY/27480http://dx.doi.org/10.1049/iet-pel.2011.0109
ISSN
1755-4535
Appears in Collections:
공과대학 > 전기공학과 > Articles
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