摘要
直流系统阻抗扫描是多端直流(multi-terminal direct current,MTDC)输电谐振抑制、直流滤波器设计等研究的重要手段。该文提出了一种适用于MTDC的直流系统阻抗扫描方法,并通过对谐波阻抗计算方法的改进,消除了扫描过程中换流器自身谐波造成的误差。以四端直流系统为例,详细研究了直流系统阻抗扫描过程中注入谐波源的幅值、相位、频率分布等各种因素对测量结果准确性的影响。PSCAD/EMTDC仿真结果表明,所提方法可对MTDC的直流系统进行准确的阻抗扫描,因此对直流工程具有参考价值。
DC system impedance scanning is one of the important means of harmonic suppression research and DC filter design on multi-terminal direct current （MTDC） transmission. This paper presents a DC system impedance scanning method for MTDC, in which the error from converter generated harmonic is excluded by improving impedance formula. Influence of various factors on the impedance scanning, such as amplitude, phase and frequency distribution of the injected harmonic source, is also studied. PSCAD/EMTDC simulation result shows that the presented method is effective and reliable for DC system impedance scanning of MTDC, which has reference value of DC engineering.
作者
崔康生
文俊
赵晓斌
李蓉
闫涵
段锐敏
CUI Kangsheng WEN Jun ZHAO Xiaobin LI Rong YAN Han DUAN Ruimin(School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China Electric Power Research Institute, Yunnan Power Grid Co, , Ltd. , Kunming 650217, China)
出处
《电力建设》
北大核心
2017年第8期17-23,共7页
Electric Power Construction
