基于阻抗分析法的柔性直流馈入容量计算方法  

Calculation Method for Flexible DC Infeed Capacity Based on Impedance Analysis

作　　者：蔡国伟[1] 王梓帆[1] 韩奕[2] 郭小江[2] CAI Guowei WANG Zifan HAN Yiz GUO Xiaojiang(School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China China Electric Power Research Institute, Beijing 100192, China)

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012 [2]中国电力科学研究院,北京市100192

出　　处：《电力系统自动化》2016年第21期66-72,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51507028);国家电网公司科技项目(XT71-15-053)

摘　　要：确定合理的直流馈入容量极限值对于保证受端电网安全稳定运行具有重要意义。以奈奎斯特判据为理论基础,提出了基于阻抗分析法的并网柔性直流输电系统馈入容量极限值计算方法。该方法不需要对变流器内部进行分析,只根据变流器的输出阻抗和电网阻抗的比值即可进行计算,使这种方法更加简捷。通过在IEEE 39节点系统上进行仿真分析,验证了所提方法的有效性,同时对影响直流输电系统的直流侧极限馈入容量的因素进行了分析。Determining the reasonable limit value of reasonable DC infeed capacity to ensure safe and stable operation of power grid is of great significance. According to the Nyquist criterion, a method is proposed based on impedance analysis to calculate the limit capacity of the grid-connected flexible DC transmission system. It makes the method simple so only the ratio of the grid impedance to the converter impedance is needed rather than learning about the inside of the converter. Through a simulation analysis on an IEEE 39-node system, the validity of the proposed method is verified, and the impact on the limit infeed capacity in the DC transmission system is briefly treated.

关 键 词：馈入容量 直流输电系统 奈奎斯特判据 阻抗分析法 

分 类 号：TM721.1[电气工程—电力系统及自动化]