多端柔性直流系统功率传输边界关键参数分析  

Analysis of Key Parameters for Power Transmission Boundary of MTDC System

作　　者：刘垚 裴玮[1,3] 邓卫[1,2] 孔力 LIU Yao;PEI Wei;DENG Wei;KONG Li(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian 116023,China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院洁净能源创新研究院,大连116023

出　　处：《电力系统及其自动化学报》2020年第9期68-76,共9页Proceedings of the CSU-EPSA

基　　金：国家科技部重点研发专项(2017YFB0903300);中国科学院先导A项目(XDA210050000)。

摘　　要：多端柔性直流技术是构建未来能源网络的关键技术之一。多端柔性直流系统的传输功率与系统参数间存在复杂的耦合关系。为了研究影响系统功率传输边界的关键因素,通过建立系统小信号模型,采用特征值法对系统振荡模态、灵敏度进行分析计算,分析得出影响多端系统传送功率容量的关键参数及变化规律。最后,利用电磁模型进行仿真验证,结果表明所提方法能够指出造成系统传输功率越界的关键因素,并给出了相应改进设计方案。Multi-terminal flexible DC(MTDC)technology is one of the key technologies to construct energy networks in the future.There is a complex coupling relationship between the power transmission capacity of a MTDC system and its parameters.In order to study the key factors that affect the system’s power transmission boundary,a small signal model of the system is constructed.By using the eigenvalue analysis method to analyze and calculate the system’s oscillation modes and eigenvalue sensitivity,the key parameters affecting the transmission capacity of the MTDC system are determined together with their varying characteristics.Finally,an electromagnetic model is used to simulate and verify the analysis.Results show that the proposed analysis method can determine the key factors that cause the transmission power to cross the boundary.In addition,the corresponding improved design scheme is given.

关 键 词：多端柔性直流 传输容量 小干扰稳定性 特征值灵敏度 

分 类 号：TM721[电气工程—电力系统及自动化]