文档名:多端柔直换流站高频谐振及传播机理分析与抑制
摘要:针对空载线路投入引起的多端柔性直流(modularmultilevelconvertermulti-terminaldirectcurrent,MMC-MTDC)输电系统高频谐振的问题,首先建立了MMC高频简化阻抗模型,基于阻抗分析法分析了空载线路投入引发单个MMC发生高频谐振的电气机理,分析发现由于空载线路投入使得MMC交流侧等效阻抗在高频段呈现负阻尼,继而引发高频谐振.而后针对不同控制方式下的受端换流站进行联合建模,通过对高频谐振能量在站间的传播路径及其对受端MMC运行影响的研究,发现MMC交流侧高频谐振能通过直流线路对其他MMC产生影响,其影响程度与外环控制方式有关.针对高频谐振问题,采用电压前馈增设带阻滤波器的抑制策略,消除了MMC在高频谐振点的负阻尼,完成了对起振MMC的阻抗重塑,有效抑制了MMC高频谐振,并降低了高频谐振能量传播对其余MMC的负面影响.最后利用RT-LAB5600实时在线仿真平台,验证了MMC高频谐振分析方法的正确性与相应抑制方法的有效性.
Abstract:Toaddresstheissueofhigh-frequencyresonanceinmultiterminalflexibledirectcurrent(DC)transmissionsystemscausedbyunloadedlineinput,asimplifiedimpedancemodelisestablishedforMMCinthehigh-frequencyrange.Basedontheimpedanceanalysis,theelectricalmechanismofhigh-frequencyresonanceinasingleMMCcausedbyanunloadedlineinputwasanalyzed.Theanalysisshowsthatowingtotheunloadedlineinput,theMMCAC-sideequivalentimpedanceexhibitsnegativedampinginthehigh-frequencyrange,leadingtohigh-frequencyresonance.Jointmodelingwasthenconductedforthereceivingconverterstationsunderdifferentcontrolmethods.Byanalyzingthepropagationpathofhigh-frequencyresonanceenergybetweenstationsanditsimpactontheoperationofreceivingMMCs,researchhasshownthathigh-frequencyresonanceontheACsideofMMCcanaffectotherMMCsthroughDClines.Thedegreeoftheimpactisrelatedtotheexternalcontrolmethod.Tosolvetheproblemofhigh-frequencyresonance,asuppressionmethodinvolvingtheadditionofabandstopfiltertothevoltagefeedforwardwasadoptedtoeliminatethenegativedampingoftheMMCatthehigh-frequencyresonancepoint,completetheimpedancereshapingoftheoscillatingMMC,effectivelysuppressthehigh-frequencyresonanceoftheMMC,andreducethenegativeimpactofhigh-frequencyresonanceenergypropagationonotherMMCs.Finally,theaccuracyoftheMMChigh-frequencyresonanceanalysisandtheeffectivenessofthecorrespondingsuppressionmethodwereverifiedusingtheRT-LAB5600real-timeonlinesimulationplatform.
作者:陈继开 孙崇博 李阳 张嘉扬Author:CHENJikai SUNChongbo LIYang ZHANGJiayang
作者单位:现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市132012
刊名:电力建设
Journal:ElectricPowerConstruction
年,卷(期):2024, 45(2)
分类号:TM71
关键词:多端柔性直流(MMC-MTDC) 高频谐振 阻抗分析法 能量传播路径
Keywords:modularmultilevelconvertermultiterminaldirectcurrent(MMC-MTDC) high-frequencyresonance impedanceanalysis energypropagationpath
机标分类号:TM721.1R242G206
在线出版日期:2024年2月3日
基金项目:多端柔直换流站高频谐振及传播机理分析与抑制[
期刊论文] 电力建设--2024, 45(2)陈继开 孙崇博 李阳 张嘉扬针对空载线路投入引起的多端柔性直流(modularmultilevelconvertermulti-terminaldirectcurrent,MMC-MTDC)输电系统高频谐振的问题,首先建立了MMC高频简化阻抗模型,基于阻抗分析法分析了空载线路投入引发单个MMC发...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
多端柔直换流站高频谐振及传播机理分析与抑制 Analysis and Suppression of High-Frequency Resonance and Propagation Mechanism in Multiterminal Flexible Direct Converter Station
多端柔直换流站高频谐振及传播机理分析与抑制.pdf
- 文件大小:
- 7.67 MB
- 下载次数:
- 60
-
高速下载
|
|