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논문 기본 정보

자료유형
학술저널
저자정보
B. Hemanth Kumar (Visvesvaraya National Institute of Technology) Makarand M. Lokhande (Visvesvaraya National Institute of Technology) Raghavendra Reddy Karasani (Sagi RamaKrishnam Raju (SRKR) Engineering College) Vijay B. Borghate (Visvesvaraya National Institute of Technology)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.18 No.1
발행연도
2018.1
수록면
56 - 69 (14page)

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In this paper, an improved Space Vector Modulation (SVM) based fault tolerant operation on a nine-level Cascaded H-Bridge (CHB) inverter with an additional backup circuit is proposed. Any type of fault in a power converter may result in a power interruption and productivity loss. Three different faults on H-bridge modules in all three phases based on the SVM approach are investigated with diagrams. Any fault in an inverter phase creates an unbalanced output voltage, which can lead to instability in the system. An additional auxiliary unit is connected in series to the three phase cascaded H-bridge circuit. With the help of this and the redundant switching states in SVM, the CHB inverter produces a balanced output with low harmonic distortion. This ensures high DC bus utilization under numerous fault conditions in three phases, which improves the system reliability. Simulation results are presented on three phase nine-level inverter with the automatic fault detection algorithm in the MATLAB/SIMULINK software tool, and experimental results are presented with DSP on five-level inverter to validate the practicality of the proposed SVM fault tolerance strategy on a CHB inverter with an auxiliary circuit.

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Abstract
I. INTRODUCTION
II. NINE-LEVEL CASCADED H-BRIDGE INVERTER
III. SPACE VECTOR MODULATION (SVM) CONTROL STRATEGY
IV. PROPOSED SVPWM BASED FAULT TOLERANCE STRATEGY
V. FAULT DETECTION TECHNIQUE
VI. INVESTIGATION OF THE FAULT TOLERANT TECHNIQUE
VII. CONCLUSION
REFERENCES

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