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The quasi-Z-source inverter (QZSI) has been presented suitable for solar photovoltaic applications mainly because of its one stage buck/boost capability and improved reliability. Carefully designed closed-loop control strategy is usually demanded by QZSI in photovoltaic applications for voltage boost, grid-connection and the maximum power point tracking (MPPT). Cascaded QZSI as to further step up...
The voltage-fed Z-source inverter/quasi-Z-source inverter (qZSI) has been presented suitable for photovoltaic (PV) applications mainly because of its single-stage buck and boost capability and improved reliability. This paper further addresses detailed modeling and control issues of the qZSI used for distributed generation (DG), such as PV or fuel cell power conditioning. The dynamical characteristics...
According to the operation performance of Doubly-fed wind power system, a novel soft grid connection strategy with initial error compensation is proposed in this paper. Grid connection mathematical model of doubly-fed induction generator is deduced, and soft grid-connection control system of DFIG is designed based on the stator flux orientation vector control technique with the rotor current dynamic...
This paper presents a hybrid control strategy for photovoltaic (PV) simulator, which emulates the output characteristics of PV arrays under different irradiation, temperature, and loads. The mathematic modeling of the I-V curve of PV arrays is investigated in this paper, and accordingly the voltage control or current control method is worked out for different segments of PV output characteristics...
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