مشخصات پژوهش

عنوان	A Hybrid Method to Eliminate Leakage Current and Balance Neutral Point Voltage for Photovoltaic Three-Level T-Type Inverter
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	PV, Three-level T-type inverter, Leakage current elimination, Common-mode voltage, Neutral point voltage balancing, carrier-based PWM, MVPWM, DPWM.
چکیده	Nowadays, neutral point voltage (NPV) balancing control and leakage current (LC) reduction methods are considered to improve the reliability of transformerless three-level T-type (3LT2 ) inverter. MVPWM method can control the inverter operation to eliminate the LC; however, is powerless to balance the NPV. Alternatively, DPWM methods can be implemented to balance the NPV. In this paper, a hybrid method for transformerless 3LT2 inverter is proposed to simultaneously minimize the LC and accomplish balancing control in case of NPV unbalancing. The proposed method applies MVPWM switching patterns to eliminate LC while the NPV is balanced. If the NPV becomes unbalanced, it applies specific switching patterns of the DPWM methods as alternative patterns to balance the NPV with minimal LC. Accordingly, the proposed method not only maintains the LC elimination advantage of the MVPWM method but also realizes the NPV balancing capability without any topology modification or adding electrical components. Noteworthy, even the NPV balancing is accomplished with minimal flow of the LC. The proposed method is carrier-based PWM, which shortens execution time and simplifies practical implementation. Experimental tests have been accomplished and results demonstrate the effectiveness of the proposed method on adding the NPV balancing capability with minimal LC to the MVPWM method.
پژوهشگران	محمدرضا لک (نفر اول)، یو ای - تینگ تی سای (نفر دوم)، بینگ - رانگ چاونگ (نفر سوم)، محمدحسن مرادی (نفر چهارم)