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联接弱交流电网的VSC-HVDC系统功率耦合特性及解耦策略 被引量:4
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作者 邵冰冰 赵书强 《电网技术》 EI CSCD 北大核心 2019年第12期4532-4540,共9页
针对联接弱交流电网的柔性直流输电系统的功率耦合问题,通过研究整流站/逆变站输出有功、无功和端电压幅值与注入电网的d、q轴电流间的线性化关系,揭示了弱交流电网下柔性直流输电系统的功率耦合特性,并提出一种功率解耦算法。最后,在PS... 针对联接弱交流电网的柔性直流输电系统的功率耦合问题,通过研究整流站/逆变站输出有功、无功和端电压幅值与注入电网的d、q轴电流间的线性化关系,揭示了弱交流电网下柔性直流输电系统的功率耦合特性,并提出一种功率解耦算法。最后,在PSCAD/EMTDC中搭建了联接弱交流电网的柔性直流输电系统仿真模型,通过仿真验证了功率的耦合特性。同时,与静态前馈补偿解耦算法和传统矢量电流控制算法相比,所提出的动态前馈补偿解耦算法具有更好的解耦效果。 展开更多
关键词 柔性直流输电系统 弱交流电网 功率耦合特性 动态前馈补偿
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A Precise Model for Simulation of Temperature Distribution in Power Modules 被引量:1
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作者 耿莉 陈治明 +2 位作者 R.Kruemmer T.Reimann J.Petzoldt 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2001年第5期548-553,共6页
The interaction between the active chips mounted and the same base plate is considered as a thermoelectrical coupling effect.An approach to coupling effect analysis of a multi-chip system is presented with IGBT as a s... The interaction between the active chips mounted and the same base plate is considered as a thermoelectrical coupling effect.An approach to coupling effect analysis of a multi-chip system is presented with IGBT as a sample.Finite element method is used to evaluate the temperature distribution in power modules.The precise electrothermal model is obtained by fitting the curve of transient thermal impedance with a finite series of exponential terms,in which,the thermal-coupling effect among chips is considered as a prediction of the highest transient temperature of the chips.This model can be used in many thermal monitoring systems.Both ANSYS and PSPICE si- mulation software have been employed,and the simulation results agree with the experimental ones very well. 展开更多
关键词 power electronics IGBT module thermal simulation thermal coupling
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