Discontinuous Modulation for Improved Thermal Balance of Three-Level 1500-V Photovoltaic Inverters under Low-Voltage Ride-Through

被引：2
|
作者：
He, Jinkui [1 ]
Sangwongwanich, Ariya [1 ]
Yang, Yongheng [2 ]
Quan, Zhongyi [3 ]
Li, Yunwei [3 ]
Iannuzzo, Francesco [1 ]
机构：
[1] Aalborg Univ, Dept Energy Technol, Pontoppidanstr 111, DK-9220 Aalborg, Denmark
[2] Zhejiang Univ, Coll Elect Engn, Zheda Rd 38, Hangzhou 310027, Peoples R China
[3] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada
来源：
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2021年
关键词：
Photovoltaic (PV) inverters; low voltage ride through; modulation; power loss; thermal stress;
D O I：
10.1109/ECCE47101.2021.9595130
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This paper investigates the thermal behavior of a 90-kW/1500-V, three-level, neutral-point-clamped (3L-NPC), single-stage PV inverter during low-voltage ride-through (LVRT) operation. To improve thermal performance during LVRT operation, a modified discontinuous pulse-width modulation (DPWM) scheme is proposed in this paper. As a major outcome, we concluded that, with the proposed scheme, the thermal stress is distributed more equally among the power devices compared to that with the conventional strategy. Simulation and experimental results are presented to assess the effectiveness of the proposed DPWM.
引用
收藏
页码：103 / 108
页数：6
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