CAJ | 학술논문

提出S变换的暂态能量法结合零序无功方向的故障选线及区段定位方法。将各馈线终端单元采集到的故障零序电流信息上传至主站，主站对全网故障信息进行信号分析，运用S变换获取表征故障信号的主导特征频率，比较此频率下各馈线的暂态能量及馈线之间的零序无功方向实现故障选线。根据故障线路上故障点前后波形差异，采用上述方法实现区段定位。仿真结果分析表明，选线和区段定位方法准确、可靠，且不受故障合闸角、噪声干扰等因素影响。
제출S변환적잠태능량법결합령서무공방향적고장선선급구단정위방법。장각궤선종단단원채집도적고장령서전류신식상전지주참，주참대전망고장신식진행신호분석，운용S변환획취표정고장신호적주도특정빈솔，비교차빈솔하각궤선적잠태능량급궤선지간적령서무공방향실현고장선선。근거고장선로상고장점전후파형차이，채용상술방법실현구단정위。방진결과분석표명，선선화구단정위방법준학、가고，차불수고장합갑각、조성간우등인소영향。
In the S-Transformation transient energy method in the zero-order reactive direction in combination with fault line selection and section location method,fault zero-order current information collected by feeder terminal units are uploaded to the main station,which makes signal analysis on the fault information of the entire network,uses S-transformation to obtain the main characteristic frequency of the characteristic fault signal,and compares the transient energy and zero-order reactive direction of the feeder lines at this frequency to complete fault line selection.According to the difference of waveform before and after the fault point of the fault line,the above method is adopted to realize section location.The simulation and analysis results indicate the accuracy and reliability of this approach,which is not affected by fault close angle,noise and other factors.