电力系统自动化2019，Vol.43Issue(5)：83-91,113,10.DOI:10.7500/AEPS20180106004
高比例变流型电源并网的输电系统三相短路电流计算
Three-phase Short-circuit Current Calculation for Power Transmission System with High Penetration of Converter-type Sources
摘要
Abstract
Short-circuit current level of power transmission system may increase with high penetration of converter-type sources, and power equipment selection will be faced with higher requirements for dynamic and thermal stability. Three-phase short-circuit current expression of converter-type sources is obtained by analyzing measured short-circuit current waveform and its change rule of envelope line. According to current output characteristics presented by converter-type sources in different periods of fault, equivalent circuits of fault transient state and steady state are proposed. In power grid with converter-type sources, superposition theorem is used to calculate AC component and DC component of short-circuit current. Then the peak value of short-circuit current is evaluated effectively, and the calculation results can be used for grid planning as well as equipment selection.Finally, the calculation results of proposed method and conventional method are compared with that of electromagnetic transient through 6-node 500 kV Huainan power grid and 35-node 220 kV Huaisu power grid, then effectiveness of the proposed method is verified.关键词
高比例/变流型电源/短路电流/直流分量/冲击电流Key words
high-penetration/converter-type source/short-circuit current/DC component/impact current引用本文复制引用
马静,刘青,吴佳芳,陈煜,沈玉明,周念成..高比例变流型电源并网的输电系统三相短路电流计算[J].电力系统自动化,2019,43(5):83-91,113,10.基金项目
国家自然科学基金资助项目(51577018) （51577018）
重庆市基础科学与前沿技术研究专项(cstc2015jcyjBX0033) （cstc2015jcyjBX0033）
This work is supported by National Natural Science Foundation of China (No. 51577018) and the Chongqing Research Program of Basic Research and Frontier Technology (No. cstc2015jcyjBX0033). （No. 51577018）
