TY - GEN
T1 - A Modified Carrier-Based Discontinuous PWM for Photovoltaic Three-Level Converter with Reduced Common Mode Voltage Ripple
AU - Li, Shangkun
AU - Song, Xuhui
AU - Zhang, Fan
AU - Chen, Yuxuan
AU - Zhang, Xuan
AU - Li, Jiajin
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Nowadays, three-level inverters are frequently applied in photovoltaic (PV) systems because of their high efficiency and low harmonics. To improve the power density of transformerless three-level inverters, the high switching frequency is considered which causes lager switching losses. Discontinuous PWM (DPWM) is a solution to reduce switching losses. However, conventional DPWMs cause common mode voltage (CMV) ripple which worsens the reliability of PV systems. To solve this problem, DPWMA is proposed by selecting space vectors which CMV amount are low, but the CMV ripple can be further reduced. In this paper, a modified carried-based DPWM is proposed to reduce CMV ripple of DPWMA. Carrier types of every phase are selected to realize an improved PWM sequence according to switching clamping modes. Finally, the proposed modulation strategy is verified in different modulation index by the simulation.
AB - Nowadays, three-level inverters are frequently applied in photovoltaic (PV) systems because of their high efficiency and low harmonics. To improve the power density of transformerless three-level inverters, the high switching frequency is considered which causes lager switching losses. Discontinuous PWM (DPWM) is a solution to reduce switching losses. However, conventional DPWMs cause common mode voltage (CMV) ripple which worsens the reliability of PV systems. To solve this problem, DPWMA is proposed by selecting space vectors which CMV amount are low, but the CMV ripple can be further reduced. In this paper, a modified carried-based DPWM is proposed to reduce CMV ripple of DPWMA. Carrier types of every phase are selected to realize an improved PWM sequence according to switching clamping modes. Finally, the proposed modulation strategy is verified in different modulation index by the simulation.
KW - common mode voltage (CMV) ripple
KW - discontinuous pulse width modulation A (DPWMA)
KW - photovoltaic(PV)
KW - T-type three-level converter
UR - https://www.scopus.com/pages/publications/85182762637
U2 - 10.1109/ICPET59380.2023.10367527
DO - 10.1109/ICPET59380.2023.10367527
M3 - 会议稿件
AN - SCOPUS:85182762637
T3 - 2023 5th International Conference on Power and Energy Technology, ICPET 2023
SP - 65
EP - 70
BT - 2023 5th International Conference on Power and Energy Technology, ICPET 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th International Conference on Power and Energy Technology, ICPET 2023
Y2 - 27 July 2023 through 30 July 2023
ER -
