CAJ | 학술논문

针对特高压线路典型分布参数特性,利用现代信号处理方法一最小二乘矩阵束法实时分析故障电流谐波.以1000 kV电压等级的输电线路为模型,用EMTP仿真建模,给出了最小二乘矩阵束法分析线路中间和末端发生单相接地和三相短路时的故障信号中的自由分量衰减特征.仿真结果表明,最小二乘矩阵束法以衰减指数函数为模型,能够快速、准确地计算出故障信号中的频率分布、相应的频率衰减时间常数以及含量.同时也给出了电科院1000 kV的动模波形和EMTP仿真波形的结果比较.动模分析结果表明,仿真模型合理,该方法很适合于暂态谐波分析,为分析暂态量对保护的影响提供指导意义.
침대특고압선로전형분포삼수특성,이용현대신호처리방법일최소이승구진속법실시분석고장전류해파.이1000 kV전압등급적수전선로위모형,용EMTP방진건모,급출료최소이승구진속법분석선로중간화말단발생단상접지화삼상단로시적고장신호중적자유분량쇠감특정.방진결과표명,최소이승구진속법이쇠감지수함수위모형,능구쾌속、준학지계산출고장신호중적빈솔분포、상응적빈솔쇠감시간상수이급함량.동시야급출료전과원1000 kV적동모파형화EMTP방진파형적결과비교.동모분석결과표명,방진모형합리,해방법흔괄합우잠태해파분석,위분석잠태량대보호적영향제공지도의의.
To analyze the distribution parameter characteristics of UHV transmission line,we put forward the least square matrix pencil method(LSMPM)to identify the harmonic components of fault current,established a simulation model of UHV transmission line by EMTP software,and presented the decaying characteristics of free components under single fault and three-phase short circuit fault by the least square matrix pencil method.The simulation result shows that the method can accurately compute the frequencies,and the decaying factors and corresponding amount because the signal model of LSMPM can be generally written as the sum of a series of decaying exponentials.The results between dynamic simulation system and EMTP model are compared.The results from dynamic simulation analysis show that the model in the EMTP simulation is suitable,and this algorithm is suitable for transient harmonic analysis and gives some guideline in transient protection.