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논문 기본 정보

자료유형
학술저널
저자정보
Neeraj Agrawal (Indian Institute of Science) Vinod John (Indian Institute of Science)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.18 No.5
발행연도
2018.9
수록면
1,567 - 1,576 (10page)

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초록· 키워드

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The reliability of grid-connected inverters can be improved by algorithms capable of diagnosing faults in LCL filters. A fault diagnostic method during inverter startup is proposed. The proposed method can accurately generate and monitor information on the peak value and the location of the peak frequency component of the step response of a damped LCL filter. To identify faults, the proposed method compares the evaluated response with the response of a healthy higher-order damped LCL filter. The frequency components in the filter voltage response are first analytically obtained in closed form, which yields the expected trends for the filter faults. In the converter controller, the frequency components in the filter voltage response are computed using an appropriately designed fast Fourier transform and compared with healthy LCL response parameters using a finite state machine, which is used to sequence the proposed startup diagnostics. The performance of the proposed method is validated by comparing analytical results with the simulation and experimental results for a three-phase grid-connected inverter with a damped LCL filter.

목차

Abstract
I. INTRODUCTION
II. LCL FILTER ANALYSIS
III. FSM FOR LCL FILTER FAULT DIAGNOSIS
IV. SIMULATION AND EXPERIMENTAL RESULTS
V. CONCLUSION
REFERENCES

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