The study of voltage stability about multi-infeed DC transmission systems is a new research field, so that voltage instability may probably threaten the security and stability of power grid.
多直流馈入输电系统的出现给电压稳定研究带来了全新的课题，电压失稳有可能成为这类电网安全稳定运行的最大威胁。
Based on the state-of-the-art research outputs, the stability and control of multi - infeed HVDC systems are comprehensively summarized with proposals of further research presented.
然后根据国内外的有关研究，对多馈入直流输电系统的稳定性和稳定控制进行了系统的总结，提出了进一步深入研究的建议。
In chapter 5, to improve transient stability of multi-infeed HVDC transmission systems, a kind of HVDC additional power modulator based on nonlinear variable structure theory is proposed.
在本文第五章中，为了提高多馈入交直流系统的暂态稳定性，提出一种直流非线性变结构附加功率调制器。
The analysis methods for multi-infeed HVDC systems are also assessed with existing problems and further improvements suggested.
最后对多馈入直流输电系统的分析方法进行了综述，并对其存在的问题提出了改进意见。
The analysis methods for multi-infeed HVDC systems are also assessed with existing problems and further improvements suggested.
最后对多馈入直流输电系统的分析方法进行了综述，并对其存在的问题提出了改进意见。
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