شماره ركورد كنفرانس :
5060
عنوان مقاله :
A Modified Discontinues PWM to Reduce Common Mode Voltage and Switching Loss for Photovoltaic Transformerless T-Type Inverter
Author/Authors :
Ehsan، Asadi School of Electrical and Computer Engineering College of Engineering - University of Tehran Tehran, Iran , Gholamreza، Moradi School of Electrical and Computer Engineering College of Engineering - University of Tehran Tehran, Iran , Majid، Sanatkar-Chayjani School of Electrical and Computer Engineering College of Engineering - University of Tehran Tehran, Iran , Shahrokh ، Farhangi School of Electrical and Computer Engineering College of Engineering - University of Tehran Tehran, Iran , Mojtaba ، Salavati School of Electrical and Computer Engineering College of Engineering - University of Tehran Tehran, Iran
كليدواژه :
Common Mode Voltage (CMV) , T-type Inverter , photovoltaic (PV) systems , constant leakage current , Pulse Width Modulation (PWM) , Space Vector Modulation (SVM)
عنوان كنفرانس :
11th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)
چكيده فارسي :
فاقد چكيده فارسي
چكيده لاتين :
In recent years, transformerless photovoltaic
systems have become popular because of their advantages such
as smaller size, lower cost, and higher efficiency. However, the
flow of the leakage current due to removing of the transformer
is a disadvantage of these systems. In this paper, a modified
Discontinues PWM (DPWM) method is proposed in order to
reduce common-mode voltage and also switching losses of a Ttype
inverter. These goals have been achieved by selecting the
vectors corresponding to lower or zero common-mode voltage
while the required number of switching in a period is decreased.
The voltage variation of DC link midpoint and output current
THD are also analyzed. Simulation results confirm that the
proposed modulation method reduce the switching losses and
RMS value of leakage current compare to conventional SVM for
a 50 kW three phase transformerless T-type inverter.
