Abstract：In this paper, the characteristic of change rates of three-phase and two-phase short- circuit currents for shipboard AC network are theoretical analyzed. The effects of fault initial angle, power angle and line impedance on the change rates of short-circuit currents are studied. The relation between fault direction and polarity of change rate of initial short-circuit current is analyzed. Based on the analysis results, an integrative criterion of fault direction judgment using change rate of initial short-circuit current and fault initial angle is proposed. Using the criterion, the fault direction can be rapidly judged by detecting and comparing the fault initial angle and polarity of change rate of initial short-circuit current with less requirements of sampling precision, real-time date and computing capacity. Simulation results verify the validity of the proposed method of fault direction judgment.
黄靖, 张晓锋, 叶志浩, 张涛. 基于电流变化率与短路合闸角综合判据的船舶交流电网短路故障方向判断[J]. 电工技术学报, 2019, 34(21): 4611-4621.
Huang Jing, Zhang Xiaofeng, Ye Zhihao, Zhang Tao. Fault Direction Judgment for Shipboard AC Network Based on Integrative Criterion of Change Rate of Current and Fault Initial Angle. Transactions of China Electrotechnical Society, 2019, 34(21): 4611-4621.
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2019, Vol. 34 
