基于区域控制器的IGBT模块热控制技术研究
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摘要
含有电力电子模块的电力系统设计通常受限于热限制,主要是考虑系统整体损耗和峰值电流的影响。热控制技术可以改善微网逆变器、分布式储能装置、动态无功补偿设备和交直流电机驱动等应用中电力电子功率模块的稳态和瞬态热机械应力。此处提出的控制技术通过控制功率模块的结温,借助在线结温值计算、开关频率调节和限制开关损耗的电流阈值防止绝缘栅双极型晶体管(IGBT)功率模块发生过热和功率循环故障。通过不同热运行区域的控制,保证电力电子功率模块持续运行,提高功率模块的可靠性和多晶硅热容量的利用率,避免电力电子模块在电力系统应用中的过度设计。实验结果和有限元分析过程进一步验证了所提热控制技术的有效性和实用性。
Power system designs with power electronics modules are often limited by thermal constraints, mainly considering the effects of overall system losses and peak currents.The thermal control technology can improve the steadystate and transient thermo-mechanical stress of power electronics power modules in applications such as micro-grid inverters,distributed energy storage devices,dynamic reactive power compensation devices,and AC/DC motor drives.The control technology proposed prevents overheating and power cycle failures of the insulated gate bipolar transistor(IGBT) power module by controlling the junction temperature of the power module,using on-line junction temperature calculations, switching frequency regulation,and current thresholds that limit switching losses.Through the control of different thermal operating regions, the power electronic power module is guaranteed to continue to operate,and the reliability of the power module and the utilization rate of the polysilicon heat capacity are improved,and over-design of the power electronic module in the power system application is avoided.Experimental results and finite element analysis further validate the effectiveness and practicality of the proposed thermal control technology.
Power system designs with power electronics modules are often limited by thermal constraints, mainly considering the effects of overall system losses and peak currents.The thermal control technology can improve the steadystate and transient thermo-mechanical stress of power electronics power modules in applications such as micro-grid inverters,distributed energy storage devices,dynamic reactive power compensation devices,and AC/DC motor drives.The control technology proposed prevents overheating and power cycle failures of the insulated gate bipolar transistor(IGBT) power module by controlling the junction temperature of the power module,using on-line junction temperature calculations, switching frequency regulation,and current thresholds that limit switching losses.Through the control of different thermal operating regions, the power electronic power module is guaranteed to continue to operate,and the reliability of the power module and the utilization rate of the polysilicon heat capacity are improved,and over-design of the power electronic module in the power system application is avoided.Experimental results and finite element analysis further validate the effectiveness and practicality of the proposed thermal control technology.
引文
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[6]李辉,白鹏飞,李洋,等.抑制IGBT器件结温的双馈风电变流器分段DSVPWM策略[J].电力自动化设备,2017,37(2):37-43.
[2]刘盛福,常垚,李武华,等.压接式IGBT模块的动态特性测试平台设计及杂散参数提取[J].电工技术学报,2017,32(22):50-57.
[3]李志刚,李雄,张强,等.SPWM模式下逆变器中IGBT结温的快速评估方法[J].高电压技术,2017,43(11):3683-3689.
[4]陈民铀,陈一高,高兵,等.考虑老化进程对热参数影响的IGBT模块寿命评估[J].中国电机工程学报,2017,37(18):5427-5436,5542.
[5]常垚,陈玉香,李武华,等.基于关断电流最大变化率的压接式IGBT模块结温提取方法[J].电工技术学报,2017,32(12):70-78.
[6]李辉,白鹏飞,李洋,等.抑制IGBT器件结温的双馈风电变流器分段DSVPWM策略[J].电力自动化设备,2017,37(2):37-43.