Three-level ZCS Converter Suitable for Distributed Photovoltaic Power Accessing Medium Voltage DC Distribution Network

被引：0
|
作者：
Wu J. [1 ]
Azeem S.W. [2 ]
Zhu X. [1 ]
Xia F. [1 ]
Lian J. [3 ]
Ning G. [2 ]
机构：
[1] State Grid Suzhou Power Supply Company, Suzhou, 215004, Jiangsu Province
[2] School of Electrical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province
[3] NARI-Relays Electric Co., Ltd., Nanjing, 211106, Jiangsu Province
来源：
Dianwang Jishu/Power System Technology | 2019年 / 43卷 / 12期
关键词：
Neutral point clamped three-level circuit (NPC-TLC); Zero-current-switching (ZCS);
D O I：
10.13335/j.1000-3673.pst.2018.2474
中图分类号：
学科分类号：
摘要：
A novel three-level zero-current-switching (ZCS) converter operating in discontinuous current mode is proposed, which is composed of a traditional neutral point clamped three-level circuit (NPC-TLC) and an auxiliary control circuit, containing 6 switches and 2 transformers. By controlling the auxiliary circuit with pulse width modulation (PWM), ZCS is realized for the basic NPC-TLC delivering most of the power with remarkably reduced switching loss of the converter. The influence of turn ratio of the auxiliary transformer on switch current is discussed, and the parameter design principles are put forward. Simulation verification is performed with PLECS software. Finally, a prototype of 300V~1500V/1500W is built to verify the performance of the proposed converter. © 2019, Power System Technology Press. All right reserved.
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页码：4486 / 4494
页数：8
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