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Fault Diagnosis of Current Sensor in Grid-Connected Inverter Based on Sliding Mode Observer
ID：7 View Protection：ATTENDEE Updated Time：2023-06-14 20:00:05 Hits：1128 Oral Presentation

Start Time：2023-06-18 09:10（Asia/Shanghai）

Duration：20min

Session：S Oral Session » S1Oral Session 1 & Oral Session 4

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Abstract
In the grid-connected inverter, the current sensor is easily affected by various faults, which reduces the reliability. In the conventional current sensor fault diagnosis method, misjudgment will occur when the current step changes as only the residual error between reference current and the sampled one is used as the fault flag. To solve this problem, in this paper, the current space vector error projection is used as the correction term to reconstruct the fault phase current using a sliding mode observer. Then, the average absolute value of the residual error between reference current and the sampled current, and the average absolute value of the residual error between reconstructed current and the sampled current are used to diagnose the fault of the current sensor. As a result, misjudgment due to the step change of the current can be avoided. Finally, the feasibility of this method is verified on the Matlab/Simulink platform.
 
Keywords
current sensor fault;current space vector;current reconstruction;fault diagnosis
Speaker
Yanyan Li
Zhengzhou University of Light Industry

Yingxun Xia
Zhengzhou University of Light Industry

Leilei Guo
Associate professor College of Electrical and Information Engineering, Zhengzhou University of Light Industry

Nan Jin
Zhengzhou University of Light Industry

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Important Date

  • Conference Date

    Jun 16

    2023

    to

    Jun 19

    2023

  • Jun 15 2023

    Contribution Submission Deadline

  • Jul 02 2023

    Registration deadline

Sponsored By
Huazhong University of Science and Technology, China
(IEEE PELS)
IEEE
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