CAJ | 학술논문

基于直流输电线路参数呈现明显的频变特性，提出了一种VSC-HVDC直流输电线路的故障定位方法。该方法利用两端电压、电流量分别计算沿线电压分布，并以电压分布在故障点处相等为判据进行故障定位。在频变参数模型基础上，利用相应的线路参数计算沿线任意点电压的时域值，并分析了数据窗长度对故障定位精度的影响。仿真结果表明，该方法可以实现全线范围内的快速准确的故障定位。
기우직류수전선로삼수정현명현적빈변특성，제출료일충VSC-HVDC직류수전선로적고장정위방법。해방법이용량단전압、전류량분별계산연선전압분포，병이전압분포재고장점처상등위판거진행고장정위。재빈변삼수모형기출상，이용상응적선로삼수계산연선임의점전압적시역치，병분석료수거창장도대고장정위정도적영향。방진결과표명，해방법가이실현전선범위내적쾌속준학적고장정위。
According to the frequency dependent characteristics of HVDC transmission lines, this paper proposes a two terminal fault location method for VSC-HVDC transmission lines. In the method, the voltage distributions are calculated by the voltages and currents measured at local and remote convert stations, and the fault points are located according to the judgement that the voltage distributions are equal at these points. Based on frequency dependent parameter model, the voltage at any point along the line in time domain can be calculated with the corresponding line parameters, and the influence of the data window length on the fault location is analyzed. Simulation results show that with the proposed method the faults location for VSC-HVDC transmission lines can be realized quickly and accurately.