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5L-ANPC逆变器中器件过电压分析及抑制 被引量:2

Analysis and Suppression of Device Over-voltage in 5L-ANPC Inverter
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摘要 针对光伏发电系统中的五电平中点有源箝位型逆变器进行研究,分析并抑制了三类引起低压器件过电压的问题。首先,通过引入吸收电容,抑制换流回路过长引起的高关断应力;其次,优化动作时序抑制前级高压器件切换引起的低压器件过电压;然后,设计特殊的关机模式抑制传统驱动全封锁关机造成的过电压问题。最后,在60 kW的实验样机上验证了电压应力抑制方法的有效性。 In this paper,the five-level active neutral-point-clamped(5L-ANPC)inverter in a photovoltaic power generation system is studied,and three types of over-voltage in the low-voltage device are analyzed.First,by introducing snubber capacitors,the high turn-off stress caused by the long commutation loop is suppressed.Second,the action sequence is optimized to suppress the over-voltage in the low-voltage device caused by the switching of the previous high-voltage device.Third,a special shutdown scheme is designed to suppress the over-voltage caused by the traditional shutdown scheme that turns off all drivers.Finally,the proposed voltage stress suppression method was verified on a 60 kW experimental prototype.
作者 黄杨涛 邓金溢 陈敏 徐德鸿 HUANG Yangtao;DENG Jinyi;CHEN Min;XU Dehong(Institute of Power Electronics,Zhejiang University,Hangzhou 310027,China)
出处 《电源学报》 CSCD 北大核心 2021年第6期129-136,共8页 Journal of Power Supply
关键词 逆变器 有源中点箝位 载波移相脉宽调制 电压应力 关机问题 inverter active neutral-point-clamped(ANPC) carrier phase-shifted pulse width modulation(PS-PWM) voltage stress shutdown problem
作者简介 黄杨涛(1997-),男,硕士研究生。研究方向:软开关技术与多电平变换器。E-mail:21810059@zju.edu.cn;邓金溢(1994-),男,博士研究生。研究方向:软开关技术与多电平变换器。E-mail:dengjinyi@zju.edu.cn;陈敏(1976-),男,博士,副教授。研究方向:新能源高效率功率变换技术,电力电子在电力系统中的应用技术,功率模块封装技术。E-mail:Heaven@cee.zju.edu.cn;通信作者:徐德鸿(1961-),男,博士,教授。研究方向:电力电子技术,先进风电、光伏变流器拓扑与控制,氢燃料电池电源系统及微电网。E-mail:xdh@cee.zju.edu.cn。
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