CAJ | 학술논문

为解决传统基于行波自然频率的单端故障测距方法在单相或远距离故障时测距精度不高的问题，提出了一种基于行波自然频率的杆塔故障定位新方法，该方法对主自然频率辨识精度不敏感，具备较好的抗差性能，提高了单相或远距离故障情况下的测距效果。通过辨识线路两端故障电流中的主自然频率值，并根据行波主自然频率值与故障距离间的倒数关系，由线路两端的主自然频率值之比，确定故障距离占线路全长的比例。仿真结果表明，所述方法故障定位精度高、稳定性好，定位结果不受季节、弧垂变化及故障距离和故障类型的影响，利于实际现场中故障位置的查找。
위해결전통기우행파자연빈솔적단단고장측거방법재단상혹원거리고장시측거정도불고적문제，제출료일충기우행파자연빈솔적간탑고장정위신방법，해방법대주자연빈솔변식정도불민감，구비교호적항차성능，제고료단상혹원거리고장정황하적측거효과。통과변식선로량단고장전류중적주자연빈솔치，병근거행파주자연빈솔치여고장거리간적도수관계，유선로량단적주자연빈솔치지비，학정고장거리점선로전장적비례。방진결과표명，소술방법고장정위정도고、은정성호，정위결과불수계절、호수변화급고장거리화고장류형적영향，리우실제현장중고장위치적사조。
In order to solve the problem of low accuracy of the single-ended fault location method based on natural frequencies of the traveling wave during single-phase or remote fault,a novel method of tower fault location using natural frequencies of the traveling wave is proposed.This method is not affected by fault types and simply depends on the accuracy of the main natural frequency,while capable of obtaining better fault location results during remote fault.By identifying the main natural frequency of the fault current at both ends of the transmission line,the ratio of the fault distance and the line length can be obtained as the inverse relationship between fault distance and the value of the main natural frequency.Simulation results show that the proposed method is effective and stable.The fault location results are hardly affected by fault distance and the variation of season and sagging in fineness,facilitating fault position confirmation on the spot.