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http://dx.doi.org/10.5370/KIEE.2011.60.8.1515

Output Voltage Control of Z-Source Inverter by the Detection of the Input DC Voltage and Z-Network Capacitor Voltage  

Kim, Se-Jin (전남대학교 전기공학과)
Jung, Young-Gook (대불대학교 융합기술학부)
Lim, Young-Cheol (전남대학교 전기공학과)
Choi, Joon-Ho (전남대학교 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.8, 2011 , pp. 1515-1522 More about this Journal
Abstract
This paper proposes the algorithm for the output AC voltage control of Z-source inverter by the detection of the input DC voltage and Z-network capacitor voltage. The actual modulation index of the proposed method is detected by the capacitor voltage in Z-network and input DC voltage of three-phase Z-source inverter. Control modulation index for the output voltage control is calculated by the detected actual modulation index and reference modulation index. And, calculated control modulation index is applied to the modified space vector modulation (SVM) for control the output voltage of Z-source inverter. To verify the validity of the proposed method, PSIM simulation was achieved and a DSP controlled 1[kW] three-phase Z-source inverter was producted. The simulation and experiment were performed under the condition that the load was changed in case of the constant input DC voltage and the input DC voltage was changed in case of the load was constant. As a result, we could know that the output phase voltage of Z-source inverter followed to the reference voltage 70[VRMS] despite the load or the input DC voltage were suddenly changed.
Keywords
Z-source inverter; Output voltage control; Detection of the input DC voltage and Z-network capacitor voltage; Modulation index; Modified space vector modulation(SVM);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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